Custom RV Holding Tanks
Poly Holding Tank Replacements
Looking for a RV holding tank replacement? Chose this poly tank for the ultimate in strength and leakproof performance. Waste liquid storage has never been more secure or installation, easier. These are extra strong tanks that are nearly unbreakable, coupled with rotomolded (seamless) construction that eliminates weak spots and seams prone to leaking, these waste holding tanks do not disappoint. Affordable and custom-made to fit perfectly, the fittings are spin welded to provide a perfect and secure fit. With no seams to break or leak, the exceptional durability of these holding tanks for rv’s can’t be beat... Rest easy knowing that they will stand up to the rigors of over the road use with ease.
Tailor your tank's dimensions to what's needed, and place the fittings precisely where they're needed for easy installation and a custom fit. We spin-weld the fittings to guarantee a flawless and secure connection for your RV holding tanks. These holding tanks for RV's fully comply with FDA regulation CFR 177.1520, thereby making them suitable for the storage of drinking/potable water. Completely sealed, these custom RV water tanks boast walls that are rotomolded and 3/8" thick, providing remarkable strength and ensuring a long lifespan for your tank. Allow us to assist you with projects that require a distinct size or shape, ensuring that you acquire the precise tank that meets your needs.
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Holding Tanks for RV’s
Discover our premium selection of custom RV holding tanks, meticulously crafted from superior FDA-approved polyethylene plastic resin, ensuring safe and leakproof liquid storage. These versatile tanks are suitable for a variety of applications, including RVs, boats, and marine vessels. Unparalleled in strength and functionality, their one-piece roto-molded construction guarantees impeccable durability, effectively preventing cracks and leaks. Equipped with female NPT openings, these tanks seamlessly integrate with any RV plumbing system. Not only are they cost-effective, but they also prioritize environmental sustainability, thanks to their spin weld fittings that guarantee a flawless fit for your tank.
One Clarion is committed providing you with the highest quality and best priced RV Holding tanks on the market! Simply Choose the shape and size of tank that you need, and call us!
Custom-Made RV Holding Tanks
Bottom Dump Waste Tanks

Part No. | Capacity | Length | Width | Depth | Drawings |
H-220 | 11 gallons | 64 | 6 | 8.25 | Drawing (pdf) |
H-263 | 11 gallons | 74 | 5.75 | 8.75 | Drawing (pdf) |
H-249 | 14 gallons | 31.5 | 17 | 8.75 | Drawing (pdf) |
H-229 | 15 gallons | 37 | 16 | 7.5 | Drawing (pdf) |
H-572 | 24 gallons | 73.75 | 11.5 | 9 | Drawing (pdf) |
H-510 | 25 gallons | 46 | 15 | 9.5 | Ask for details |
H-224 | 25 gallons | 75.75 | 8 | 13 | Drawing (pdf) |
H-223 | 27 gallons | 76 | 16 | 13 | Drawing (pdf) |
H-251 | 35 gallons | 52 | 24 | 8.5 | Drawing (pdf) |
H-286 | 35 gallons | 76 | 11 | 12.75 | Drawing (pdf) |
H-277 | 38 gallons | 28.25 | 23.25 | 14 | Drawing (pdf) |
H-280 | 40 gallons | 27.5 | 23.5 | 14 | Drawing (pdf) |
H-317 | 40 gallons | 79 | 11 | 13 | Drawing (pdf) |
H-312 | 40 gallons | 90 | 33.5 | 12 | Drawing (pdf) |
H-276 | 43 gallons | 84 | 11 | 13 | Drawing (pdf) |
H-418 | 43 gallons | 85 | 17.5 | 9.75 | Drawing (pdf) |
H-432 | 44 gallons | 65 | 15.25 | 12 | Drawing (pdf) |
H-354 | 44 gallons | 78 | 12.5 | 13 | Drawing (pdf) |
H-359 | 47 gallons | 68 | 27.25 | 7.5 | Drawing (pdf) |
H-311 | 48 gallons | 80 | 20 | 12 | Drawing (pdf) |
H-437 | 51 gallons | 85 | 17.5 | 11.25 | Drawing (pdf) |
H-226 | 52 gallons | 84 | 13.25 | 13 | Drawing (pdf) |
H-316 | 55 gallons | 79 | 15.5 | 13 | Drawing (pdf) |
H-281 | 59 gallons | 42 | 27.25 | 13 | Drawing (pdf) |
H-375 | 60 gallons | 79.75 | 16.25 | 13.25 | Drawing (pdf) |
H-275 | 62 gallons | 84 | 15.5 | 13 | Drawing (pdf) |
H-419 | 63 gallons | 85 | 24.75 | 9.75 | Drawing (pdf) |
H-287 | 65 gallons | 76 | 20 | 12.75 | Drawing (pdf) |
H-353 | 66 gallons | 78 | 18.5 | 13 | Drawing (pdf) |
H-304 | 66 gallons | 85 | 21 | 11.75 | Drawing (pdf) |
H-433 | 70 gallons | 65 | 22.75 | 12 | Drawing (pdf) |
H-227 | 72 gallons | 84.25 | 18 | 13 | Drawing (pdf) |
H-436 | 73 gallons | 85 | 24.75 | 11.25 | Drawing (pdf) |
H-362 | 90 gallons | 79.75 | 24 | 13.25 | Drawing (pdf) |
H-422 | 110 gallons | 63 | 24.75 | 17.75 | Ask for details |
Custom-Made RV Holding Tanks
End Dump Holding Tanks

Part No. | Capacity | Length | Width | Depth | Drawings |
H-545 | 6 gallons | 38.375 | 15 | 3.5 | Ask for details |
H-273 | 8 gallons | 15 | 17 | 8 | Drawing (pdf) |
H-135 | 8 gallons | 22.75 | 12.75 | 7.5 | Drawing (pdf) |
H-128 | 9 gallons | 32.5 | 15 | 6.5 | Drawing (pdf) |
H-256 | 9 gallons | 35 | 11.75 | 6 | Drawing (pdf) |
H-491 | 9 gallons | 82 | 6 | 6.75 | Ask for details |
H-565 | 9 gallons | 84.25 | 8 | 8.5 | Drawing (pdf) |
H-380 | 10 gallons | 43.5 | 15 | 5.75 | Drawing (pdf) |
H-384 | 10 gallons | 43.5 | 15 | 5.75 | Drawing (pdf) |
H-325 | 10 gallons | 61.5 | 8 | 8.5 | Drawing (pdf) |
H-493 | 10 gallons | 68 | 8 | 7.625 | Drawing (pdf) |
H-219S | 10 gallons | 70 | 5.5 | 15 | Drawing (pdf) |
H-219L | 12 gallons | 88 | 5.5 | 15 | Drawing (pdf) |
H-131 | 15 gallons | 58 | 14.25 | 6 | Drawing (pdf) |
H-379 | 16 gallons | 56 | 10 | 8.5 | Drawing (pdf) |
H-307 | 16 gallons | 65 | 20 | 4.5 | Drawing (pdf) |
H-253 | 17 gallons | 30 | 20 | 8 | Drawing (pdf) |
H-566 | 18 gallons | 30 | 19.875 | 8.75 | Drawing (pdf) |
H-244 | 19 gallons | 54 | 22 | 6.5 | Drawing (pdf) |
H-567 | 19 gallons | 76 | 16 | 5 | Drawing (pdf) |
H-96 | 20 gallons | 26 | 19.75 | 11 | Drawing (pdf) |
H-448 | 20 gallons | 42 | 29.5 | 5.25 | Drawing (pdf) |
H-502 | 20 gallons | 48 | 16 | 8 | Drawing (pdf) |
H-424 | 20 gallons | 61 | 14.75 | 6.5 | Drawing (pdf) |
H-551 | 21 gallons | 32 | 17 | 10.75 | Drawing (pdf) |
H-571 | 21 gallons | 61 | 11 | 9 | Drawing (pdf) |
H-454 | 21 gallons | 95 | 13.75 | 7.5 | Drawing (pdf) |
H-294 | 22 gallons | 40 | 20 | 8 | Drawing (pdf) |
H-272 | 23 gallons | 38 | 25.5 | 6.5 | Drawing (pdf) |
H-298 | 23 gallons | 43 | 10.5 | 13 | Drawing (pdf) |
H-447 | 23 gallons | 68 | 20 | 5.25 | Drawing (pdf) |
H-103 | 24 gallons | 76 | 11 | 8.5 | Drawing (pdf) |
H-521 | 24 gallons | 93.25 | 13.625 | 7.1875 | Ask for details |
H-278 | 25 gallons | 38 | 26 | 7.5 | Drawing (pdf) |
H-295 | 25 gallons | 42 | 20 | 8 | Drawing (pdf) |
H-453S | 25 gallons | 82 | 13 | 7.5 | Drawing (pdf) |
H-560 | 26 gallons | 73.75 | 12 | 9 | Drawing (pdf) |
H-444 | 26 gallons | 81.5 | 14.5 | 6.25 | Drawing (pdf) |
H-21 | 27 gallons | 44 | 13.25 | 12.5 | Drawing (pdf) |
H-356 | 27 gallons | 82 | 16 | 6 | Drawing (pdf) |
H-453L | 27 gallons | 94 | 13 | 7.5 | Drawing (pdf) |
H-558 | 28 gallons | 55 | 13.625 | 9.875 | Drawing (pdf) |
H-217 | 29 gallons | 74.25 | 21.25 | 6.5 | Drawing (pdf) |
H-270 | 30 gallons | 50.5 | 20 | 8 | Drawing (pdf) |
H-449 | 30 gallons | 54 | 43.75 | 5.75 | Drawing (pdf) |
H-476 | 30 gallons | 90 | 16 | 6 | Ask for details |
H-237 | 30 gallons | 98 | 16 | 6 | Drawing (pdf) |
H-562 | 31 gallons | 58 | 22 | 8 | Drawing (pdf) |
H-67 | 32 gallons | 36 | 36 | 7.25 | Drawing (pdf) |
H-531 | 32 gallons | 96 | 14.5 | 8 | Drawing (pdf) |
H-370 | 34 gallons | 104 | 10 | 9 | Drawing (pdf) |
H-420 | 35 gallons | 104 | 17.25 | 6 | Drawing (pdf) |
H-305 | 35 gallons | 47 | 26.5 | 9 | Drawing (pdf) |
H-215 | 36 gallons | 48 | 36 | 7 | Drawing (pdf) |
H-388 | 38 gallons | 54.75 | 21.5 | 9.25 | Drawing (pdf) |
H-218 | 38 gallons | 68.25 | 21.25 | 8 | Drawing (pdf) |
H-536 | 38 gallons | 90 | 16 | 8.5 | Drawing (pdf) |
H-498 | 42 gallons | 60 | 30 | 7.25 | Drawing (pdf) |
H-432 | 44 gallons | 65 | 15.25 | 12 | Drawing (pdf) |
H-570 | 47 gallons | 48 | 27 | 15 | Drawing (pdf) |
H-359 | 47 gallons | 68 | 27.25 | 7.5 | Drawing (pdf) |
H-515 | 48 gallons | 44 | 29 | 11 | Ask for details |
H-514 | 50 gallons | 38 | 35 | 11 | Drawing (pdf) |
H-361 | 50 gallons | 42 | 32 | 10.5 | Drawing (pdf) |
H-257 | 51 gallons | 30 | 26 | 16 | Drawing (pdf) |
H-284 | 55 gallons | 42 | 27.25 | 13 | Drawing (pdf) |
H-303 | 55 gallons | 51 | 27.25 | 14 | Drawing (pdf) |
H-85 | 55 gallons | 51.75 | 28 | 10 | Drawing (pdf) |
H-266 | 56 gallons | 60 | 29.5 | 13 | Drawing (pdf) |
H-484 | 56 gallons | 60 | 30 | 9 | Ask for details |
H-421 | 56 gallons | 65 | 20.25 | 17.75 | Drawing (pdf) |
H-365 | 60 gallons | 60.25 | 21 | 13 | Drawing (pdf) |
H-260 | 60 gallons | 65 | 26 | 13 | Drawing (pdf) |
H-143 | 60 gallons | 72 | 16 | 14.5 | Drawing (pdf) |
H-569 | 76 gallons | 48 | 15 | 27 | Drawing (pdf) |
H-265 | 77 gallons | 60 | 29.5 | 13 | Drawing (pdf) |
H-540 | 78 gallons | 50 | 50 | 8.625 | Drawing (pdf) |
H-259 | 82 gallons | 65 | 29.5 | 13 | Ask for details |
H-390 | 82 gallons | 80 | 15 | 19.5 | Drawing (pdf) |
H-144 | 93 gallons | 72.25 | 24 | 14.5 | Drawing (pdf) |
H-310 | 104 gallons | 57 | 28 | 20 | Drawing (pdf) |
H-165 | 110 gallons | 65 | 21 | 13 | Drawing (pdf) |
H-165M | 110 gallons | 65 | 21 | 21.5 | Drawing (pdf) |
H-166 | 115 gallons | 60.25 | 24 | 20 | Drawing (pdf) |
H-366 | 120 gallons | 65 | 24 | 20 | Drawing (pdf) |
H-331 | 123 gallons | 100 | 32 | 11 | Drawing (pdf) |
H-313 | 135 gallons | 83 | 37 | 19 | Drawing (pdf) |
H-360 | 170 gallons | 58 | 24 | 30 | Drawing (pdf) |
H-543 | 250 gallons | 72 | 48 | 19 | Drawing (pdf) |
Custom-Made RV Holding Tanks
End Dump Holding Tanks with Rails

Part No. | Capacity | Length | Width | Depth | Drawings |
H-130 | 12 gallons | 18 | 17.75 | 14.25 | Drawing (pdf) |
H-79 | 15 gallons | 60 | 11.75 | 7.75 | Drawing (pdf) |
H-59 | 17 gallons | 71.25 | 14.75 | 6.5 | Drawing (pdf) |
H-28 | 20 gallons | 34 | 15 | 12 | Drawing (pdf) |
H-42 | 21 gallons | 36 | 21 | 7.5 | Drawing (pdf) |
H-201 | 22 gallons | 50.5 | 17.25 | 8.75 | Drawing (pdf) |
H-34 | 23 gallons | 33.75 | 20 | 9.5 | Drawing (pdf) |
H-47 | 24 gallons | 54.75 | 21 | 7.5 | Drawing (pdf) |
H-65 | 23 gallons | 30 | 21 | 11 | Drawing (pdf) |
H-330 | 25 gallons | 31 | 27 | 9.5 | Drawing (pdf) |
H-55 | 25 gallons | 51 | 23.75 | 9 | Drawing (pdf) |
H-355 | 25 gallons | 54 | 32 | 5.75 | Drawing (pdf) |
H-72 | 21 gallons | 59.25 | 16 | 8.5 | Drawing (pdf) |
H-205 | 27 gallons | 26.75 | 20 | 8.5 | Drawing (pdf) |
H-213 | 27 gallons | 55 | 23.75 | 7.75 | Drawing (pdf) |
H-3 | 27 gallons | 55 | 24 | 7 | Drawing (pdf) |
H-204 | 27 gallons | 57 | 20 | 9 | Drawing (pdf) |
H-57 | 25 gallons | 64 | 18 | 7.5 | Drawing (pdf) |
H-368 | 29 gallons | 48 | 38 | 5.5 | Drawing (pdf) |
H-64 | 30 gallons | 30 | 25 | 11 | Drawing (pdf) |
H-24 | 30 gallons | 35.75 | 24 | 10 | Drawing (pdf) |
H-339 | 30 gallons | 55 | 22 | 10 | Drawing (pdf) |
H-584 | 31 gallons | 54 | 22 | 8 | Drawing (pdf) |
H-463 | 31 gallons | 60 | 23 | 7.75 | Ask for details |
H-393 | 32 gallons | 43 | 23 | 10.25 | Drawing (pdf) |
H-206 | 32 gallons | 55 | 20.25 | 9.5 | Drawing (pdf) |
H-52 | 32 gallons | 67.5 | 20 | 7.75 | Drawing (pdf) |
H-464 | 34 gallons | 60 | 23 | 7.75 | Ask for details |
H-305 | 35 gallons | 47 | 26.5 | 9 | Drawing (pdf) |
H-512 | 34 gallons | 55 | 24 | 10.5 | Drawing (pdf) |
H-45 | 35 gallons | 49.25 | 27 | 8.5 | Drawing (pdf) |
H-51 | 35 gallons | 67.5 | 26 | 7.75 | Drawing (pdf) |
H-252 | 36 gallons | 45 | 22 | 10.5 | Drawing (pdf) |
H-6 | 37 gallons | 48.5 | 25 | 9 | Drawing (pdf) |
H-334 | 39 gallons | 54.75 | 27 | 8.75 | Drawing (pdf) |
H-14 | 39 gallons | 55 | 26.5 | 9 | Drawing (pdf) |
H-7 | 40 gallons | 54.5 | 26.5 | 9 | Drawing (pdf) |
H-308 | 40 gallons | 54.75 | 27 | 9 | Drawing (pdf) |
H-333 | 40 gallons | 55 | 32 | 10 | Drawing (pdf) |
H-501 | 40 gallons | 56 | 28.5 | 8.25 | Drawing (pdf) |
H-290 | 40 gallons | 56.5 | 24.5 | 8.75 | Ask for details |
H-364 | 40 gallons | 57 | 25 | 9.5 | Drawing (pdf) |
H-383 | 40 gallons | 57 | 42 | 7 | Drawing (pdf) |
H-513 | 40 gallons | 60 | 27 | 10 | Ask for details |
H-507 | 40 gallons | 84 | 27 | 6.5 | Drawing (pdf) |
H-225 | 44 gallons | 61 | 31.25 | 8.5 | Drawing (pdf) |
H-407 | 45 gallons | 58 | 25 | 8.75 | Drawing (pdf) |
H-371 | 50 gallons | 53 | 27 | 10 | Drawing (pdf) |
H-516 | 50 gallons | 69 | 29 | 8.25 | Ask for details |
H-363 | 55 gallons | 60 | 35 | 9.25 | Drawing (pdf) |
H-17 | 55 gallons | 70 | 27 | 8.75 | Ask for details |
Custom-Made RV Holding Tanks
L-Shaped End Dump Holding Tanks

Part No. | Capacity | Length | Width | Depth | Drawing |
H-235 | 9 gallons | 28 | 17.5 | 6 | Drawing (pdf) |
H-232 | 10 gallons | 30 | 16 | 6.25 | Drawing (pdf) |
H-435 | 13 gallons | 30 | 20 | 8 | Drawing (pdf) |
H-236 | 15 gallons | 72.5 | 15 | 6 | Drawing (pdf) |
H-234 | 18 gallons | 28 | 27 | 6.5 | Drawing (pdf) |
H-238 | 19 gallons | 71.5 | 18 | 5 | Drawing (pdf) |
H-522 | 19 gallons | 97.4375 | 16.375 | 7.625 | Drawing (pdf) |
H-520 | 20 gallons | 103.4375 | 16.375 | 7.625 | Drawing (pdf) |
H-568 | 20 gallons | 44 | 41.5 | 6 | Drawing (pdf) |
H-236D | 20 gallons | 72.5 | 15 | 7.5 | Ask for details |
H-398 | 22 gallons | 38.25 | 44 | 7.75 | Drawing (pdf) |
H-537 | 23 gallons | 47.75 | 23.25 | 10.5 | Drawing (pdf) |
H-40 | 24 gallons | 36 | 20 | 12.75 | Drawing (pdf) |
H-367 | 25 gallons | 42 | 44 | 7.75 | Drawing (pdf) |
H-509 | 25 gallons | 42.5625 | 25.0625 | 7.25 | Ask for details |
H-238D | 25 gallons | 71.5 | 18 | 6.5 | Ask for details |
H-460 | 26 gallons | 37 | 30.5 | 7.5 | Ask for details |
H-549 | 26 gallons | 54.5 | 19 | 13.375 | Ask for details |
H-538 | 31 gallons | 103 | 34 | 8.5 | Drawing (pdf) |
H-348S | 32 gallons | 57 | 44 | 8 | Drawing (pdf) |
H-369 | 34 gallons | 80 | 33 | 9.5 | Drawing (pdf) |
H-539 | 37 gallons | 104 | 28.5 | 10.5 | Drawing (pdf) |
H-534 | 39 gallons | 104 | 18.5 | 6.25 | Drawing (pdf) |
H-417 | 40 gallons | 57 | 58 | 8 | Drawing (pdf) |
H-535 | 41 gallons | 104 | 18.5 | 6.25 | Drawing (pdf) |
H-345 | 41 gallons | 80 | 36 | 6.75 | Drawing (pdf) |
H-533 | 43 gallons | 53 | 36.25 | 10.5 | Drawing (pdf) |
H-84 | 50 gallons | 60 | 27 | 11.5 | Ask for details |
H-314 | 71 gallons | 77 | 34.75 | 9.75 | Drawing (pdf) |
H-458 | 74 gallons | 57.5 | 19.25 | 20 | Drawing (pdf) |
H-459 | 103 gallons | 57.5 | 26.5 | 20 | Ask for details |
Custom-Made RV Holding Tanks
L-Shaped Side Dump Holding Tanks

Part No. | Capacity | Length | Width | Depth | Drawing |
H-302 | 13 gallons | 65.75 | 22.75 | 6 | Drawing (pdf) |
H-301 | 16 gallons | 73.5 | 34.25 | 6 | Drawing (pdf) |
H-429 | 20 gallons | 80 | 40.5 | 6 | Drawing (pdf) |
H-285 | 24 gallons | 50 | 22 | 8.75 | Drawing (pdf) |
H-475 | 26 gallons | 44 | 38.25 | 8 | Ask for details |
H-233 | 35 gallons | 74 | 33.5 | 6 | Drawing (pdf) |
H-109 | 40 gallons | 76 | 27 | 10 | Drawing (pdf) |
H-425 | 45 gallons | 93 | 30 | 8.5 | Drawing (pdf) |
Custom-Made RV Holding Tanks
Recessed End Dump Holding Tanks

Part No. | Capacity | Length | Width | Depth | Drawing |
H-326 | 9 gallons | 31.5 | 15.5 | 8 | Drawing (pdf) |
H-27 | 10 gallons | 31.25 | 6.5 | 8.5 | Drawing (pdf) |
H-327 | 10 gallons | 46 | 16.5 | 8.5 | Drawing (pdf) |
H-306 | 11 gallons | 18.5 | 14.25 | 15.5 | Drawing (pdf) |
H-322 | 12 gallons | 53 | 11 | 8 | Drawing (pdf) |
H-573 | 13 gallons | 19.75 | 17.75 | 13.5 | Drawing (pdf) |
H-552 | 14 gallons | 25 | 19.5 | 9.125 | Ask for details |
H-382 | 14 gallons | 67 | 11 | 8 | Drawing (pdf) |
H-271 | 16 gallons | 72.5 | 11 | 8.5 | Drawing (pdf) |
H-274 | 16 gallons | 79.5 | 11 | 8 | Drawing (pdf) |
H-381 | 18 gallons | 67 | 11 | 8 | Drawing (pdf) |
H-328 | 18 gallons | 68 | 14 | 8 | Drawing (pdf) |
H-248 | 18 gallons | 70.75 | 12 | 7.5 | Drawing (pdf) |
H-323 | 19 gallons | 68 | 12.25 | 8.5 | Drawing (pdf) |
H-337 | 20 gallons | 68 | 15 | 8.5 | Drawing (pdf) |
H-261 | 20 gallons | 71 | 15 | 8.5 | Drawing (pdf) |
H-321 | 20 gallons | 96 | 11 | 7.5 | Drawing (pdf) |
H-553 | 21 gallons | 24 | 19.5 | 12.75 | Drawing (pdf) |
H-556 | 21 gallons | 24.0625 | 20.4375 | 14.25 | Drawing (pdf) |
H-338 | 24 gallons | 68 | 15 | 8 | Drawing (pdf) |
H-555 | 27 gallons | 28 | 20 | 15 | Drawing (pdf) |
H-20 | 27 gallons | 53 | 13 | 12 | Drawing (pdf) |
H-247 | 27 gallons | 73.75 | 15 | 7.75 | Drawing (pdf) |
H-97 | 30 gallons | 38.75 | 21.5 | 11.5 | Drawing (pdf) |
H-91 | 30 gallons | 54.5 | 32 | 7 | Drawing (pdf) |
H-37 | 35 gallons | 70 | 15 | 10 | Drawing (pdf) |
H-315 | 40 gallons | 57 | 28 | 9 | Drawing (pdf) |
H-351 | 44 gallons | 59 | 17 | 13 | Drawing (pdf) |
H-486 | 47 gallons | 78 | 16.9375 | 11.375 | Ask for details |
H-490 | 47 gallons | 81 | 17 | 11.625 | Ask for details |
H-471 | 48 gallons | 54.25 | 20 | 13 | Ask for details |
H-481 | 59 gallons | 78 | 20 | 11.375 | Ask for details |
H-385 | 60 gallons | 76.5 | 14.75 | 16 | Ask for details |
H-391 | 61 gallons | 80 | 13.75 | 20.5 | Ask for details |
H-482 | 63 gallons | 78 | 23 | 11.375 | Ask for details |
H-487 | 68 gallons | 78 | 23.5 | 11.375 | Ask for details |
H-489 | 68 gallons | 81 | 23.5 | 11.625 | Ask for details |
H-169 | 72 gallons | 90 | 20 | 11 | Drawing (pdf) |
H-477 | 74 gallons | 57.5 | 48.5 | 9.25 | Ask for details |
H-357 | 75 gallons | 76.5 | 13.5 | 21 | Drawing (pdf) |
H-243 | 78 gallons | 85 | 13.25 | 18.5 | Ask for details |
H-557 | 80 gallons | 37 | 22.5 | 25.625 | Drawing (pdf) |
H-470 | 80 gallons | 56.75 | 48.75 | 7.75 | Ask for details |
H-495 | 80 gallons | 58 | 24.5 | 17 | Ask for details |
H-473 | 100 gallons | 63.75 | 23.5 | 19 | Ask for details |
Custom-Made RV Holding Tanks
Recessed End Dump Holding Tanks w/Rails

Part No. | Capacity | Length | Width | Depth | Drawing |
H-586 | 12 gallons | 35.5 | 18 | 6 | Ask for details |
H-587 | 19 gallons | 52 | 19 | 6 | Drawing (pdf) |
H-577 | 23 gallons | 48 | 17.5 | 10 | Drawing (pdf) |
H-508 | 35 gallons | 56 | 24 | 8.125 | Ask for details |
Custom-Made RV Holding Tanks
Recessed Side Dump Holding Tanks

Part No. | Capacity | Length | Width | Depth | Drawing |
H-575 | 12 gallons | 19.75 | 17.75 | 10 | Drawing (pdf) |
Custom-Made RV Holding Tanks
Recessed Side Dump Holding Tanks With Rails

Custom-Made RV Holding Tanks
Side Dump Holding Tanks

Part No. | Capacity | Length | Width | Depth | Drawing |
H-542 | 9.5 gallons | 26.875 | 20.25 | 6.875 | Ask for details |
H-574 | 10 gallons | 46.75 | 28 | 2.75 | Drawing (pdf) |
H-324 | 11 gallons | 34.5 | 16.5 | 6.5 | Drawing (pdf) |
H-576 | 11 gallons | 46.75 | 28 | 3.5 | Drawing (pdf) |
H-559 | 14 gallons | 46 | 16 | 6 | Drawing (pdf) |
H-564 | 18 gallons | 36.25 | 24.125 | 6 | Drawing (pdf) |
H-428 | 21 gallons | 53 | 24 | 6 | Drawing (pdf) |
H-550 | 24 gallons | 32 | 23 | 9.125 | Drawing (pdf) |
H-423 | 25 gallons | 39 | 31 | 6.5 | Drawing (pdf) |
H-561 | 29 gallons | 30.375 | 28.3125 | 9.75 | Drawing (pdf) |
H-532 | 30 gallons | 110 | 14.5 | 6 | Drawing (pdf) |
H-450S | 32 gallons | 38.75 | 46 | 6.5 | Drawing (pdf) |
H-416 | 35 gallons | 104 | 17.25 | 6 | Drawing (pdf) |
H-450L | 35 gallons | 42 | 46 | 6.5 | Drawing (pdf) |
H-578 | 38 gallons | 72.5 | 22 | 6.5 | Drawing (pdf) |
H-452 | 41 gallons | 83 | 16 | 10.25 | Drawing (pdf) |
H-414 | 41 gallons | 85.5 | 16 | 10.75 | Drawing (pdf) |
H-126 | 42 gallons | 42 | 27.25 | 10.5 | Drawing (pdf) |
H-239 | 42 gallons | 42.5 | 27.25 | 10.5 | Drawing (pdf) |
H-443 | 44 gallons | 85.5 | 22 | 10.25 | Drawing (pdf) |
H-541 | 45 gallons | 55 | 50 | 6 | Ask for details |
H-439 | 53 gallons | 84 | 20.5 | 9.75 | Drawing (pdf) |
H-283 | 57 gallons | 42 | 27.25 | 13 | Drawing (pdf) |
H-349 | 57 gallons | 70 | 24 | 10 | Drawing (pdf) |
H-441 | 59 gallons | 85.5 | 22 | 10.25 | Drawing (pdf) |
H-442 | 59 gallons | 85.5 | 22 | 10.25 | Drawing (pdf) |
H-282 | 60 gallons | 60 | 27 | 11.5 | Drawing (pdf) |
H-415 | 60 gallons | 85.5 | 24.5 | 10.75 | Drawing (pdf) |
H-451 | 64 gallons | 83 | 24.5 | 10.25 | Drawing (pdf) |
H-155 | 65 gallons | 85 | 22.75 | 12.5 | Drawing (pdf) |
H-426 | 65 gallons | 87.5 | 22 | 11.25 | Drawing (pdf) |
H-427 | 65 gallons | 87.5 | 22 | 11.25 | Drawing (pdf) |
H-440 | 70 gallons | 84 | 25 | 9.75 | Drawing (pdf) |
H-386 | 77 gallons | 87.5 | 22 | 13 | Drawing (pdf) |
H-387 | 77 gallons | 87.5 | 22 | 13 | Drawing (pdf) |
H-554 | 250 gallons | 72 | 48 | 19 | Drawing (pdf) |
Custom-Made RV Holding Tanks
Side Dump Holding Tanks with Rails

Part No. | Capacity | Length | Width | Depth | Drawing |
H-82 | 18 gallons | 35.5 | 23.75 | 7.25 | Drawing (pdf) |
H-299 | 18 gallons | 45.25 | 27.5 | 5.5 | Drawing (pdf) |
H-530 | 19 gallons | 42 | 28 | 5.75 | Drawing (pdf) |
H-523 | 20 gallons | 53 | 16.5 | 4.8125 | Drawing (pdf) |
H-342 | 20 gallons | 55 | 20 | 7 | Drawing (pdf) |
H-343 | 20 gallons | 55 | 20 | 7 | Drawing (pdf) |
H-344 | 20 gallons | 55 | 47 | 6 | Ask for details |
H-563 | 21 gallons | 48.5 | 22.5 | 6 | Drawing (pdf) |
H-300 | 24 gallons | 52 | 17 | 8 | Drawing (pdf) |
H-246 | 25 gallons | 56 | 40 | 8 | Drawing (pdf) |
H-100 | 25 gallons | 58 | 32 | 6 | Drawing (pdf) |
H-83 | 25 gallons | 58 | 32 | 6 | Drawing (pdf) |
H-25 | 25 gallons | 59 | 27 | 5.5 | Drawing (pdf) |
H-228 | 29 gallons | 64.75 | 17 | 7.75 | Ask for details |
H-75 | 30 gallons | 43 | 20.5 | 12 | Drawing (pdf) |
H-335 | 30 gallons | 52 | 29 | 8 | Drawing (pdf) |
H-332 | 30 gallons | 55 | 35 | 7 | Drawing (pdf) |
H-347 | 30 gallons | 53.75 | 28 | 6.5 | Ask for details |
H-210 | 30 gallons | 56 | 36 | 6 | Drawing (pdf) |
H-210M | 30 gallons | 56 | 36 | 6.5 | Drawing (pdf) |
H-211 | 30 gallons | 56 | 36 | 6 | Drawing (pdf) |
H-547 | 31 gallons | 60 | 30 | 6 | Drawing (pdf) |
H-202 | 32 gallons | 54 | 28 | 7.75 | Drawing (pdf) |
H-212 | 34 gallons | 54 | 28 | 7.25 | Drawing (pdf) |
H-392 | 34 gallons | 54.25 | 28 | 7.25 | Drawing (pdf) |
H-211M | 34 gallons | 56 | 36 | 6.5 | Ask for details |
H-318 | 35 gallons | 55.5 | 30 | 7.5 | Drawing (pdf) |
H-208 | 35 gallons | 56 | 28 | 8 | Drawing (pdf) |
H-527 | 35 gallons | 59 | 28 | 8.125 | Drawing (pdf) |
H-582 | 37 gallons | 61.875 | 24 | 8 | Drawing (pdf) |
H-583 | 37 gallons | 61.875 | 24 | 8 | Drawing (pdf) |
H-358 | 38 gallons | 56 | 30 | 7.5 | Drawing (pdf) |
H-469 | 38 gallons | 60 | 24 | 8 | Ask for details |
H-221 | 39 gallons | 55.75 | 30 | 8 | Drawing (pdf) |
H-5 | 40 gallons | 52.5 | 24.25 | 9.25 | Drawing (pdf) |
H-505 | 40 gallons | 53 | 34 | 7.75 | Drawing (pdf) |
H-506 | 40 gallons | 53 | 34 | 7.75 | Drawing (pdf) |
H-352 | 40 gallons | 55 | 32 | 10 | Drawing (pdf) |
H-340 | 40 gallons | 55 | 35 | 7 | Drawing (pdf) |
H-341 | 40 gallons | 55 | 47 | 6 | Drawing (pdf) |
H-288 | 40 gallons | 56 | 30 | 7.75 | Drawing (pdf) |
H-474 | 40 gallons | 56 | 40 | 8 | Ask for details |
H-309 | 40 gallons | 57.75 | 42 | 6.75 | Drawing (pdf) |
H-289 | 40 gallons | 58 | 38 | 7.75 | Drawing (pdf) |
H-319 | 40 gallons | 59 | 28 | 8 | Drawing (pdf) |
H-320 | 40 gallons | 59 | 28 | 8 | Drawing (pdf) |
H-500 | 40 gallons | 65 | 24 | 8.25 | Drawing (pdf) |
H-245 | 41 gallons | 56 | 40 | 8 | Drawing (pdf) |
H-209 | 41 gallons | 56 | 32 | 7 | Drawing (pdf) |
H-203 | 42 gallons | 54.25 | 28 | 9 | Drawing (pdf) |
H-445 | 42 gallons | 54.5 | 26.5 | 9 | Drawing (pdf) |
H-240 | 44 gallons | 57 | 42 | 7 | Drawing (pdf) |
H-207 | 45 gallons | 56 | 40 | 7.75 | Drawing (pdf) |
H-378 | 45 gallons | 56 | 45 | 5.25 | Drawing (pdf) |
H-336 | 36 gallons | 57.25 | 32 | 9 | Drawing (pdf) |
H-409 | 45 gallons | 58.5 | 45 | 5.25 | Drawing (pdf) |
H-267 | 45 gallons | 60.5 | 33 | 9 | Drawing (pdf) |
H-455 | 46 gallons | 58 | 25 | 10 | Drawing (pdf) |
H-412 | 46 gallons | 64 | 31 | 8 | Drawing (pdf) |
H-585 | 47 gallons | 61 | 26 | 9.5 | Drawing (pdf) |
H-430 | 47 gallons | 61 | 36 | 7 | Drawing (pdf) |
H-526 | 48 gallons | 48 | 36 | 6.75 | Drawing (pdf) |
H-446 | 50 gallons | 54 | 35 | 9 | Drawing (pdf) |
H-413 | 50 gallons | 56 | 30 | 10 | Drawing (pdf) |
H-499 | 50 gallons | 56 | 35 | 9 | Drawing (pdf) |
H-431 | 50 gallons | 61 | 40 | 6.75 | Drawing (pdf) |
H-579 | 50 gallons | 65 | 29 | 8.25 | Drawing (pdf) |
H-497 | 55 gallons | 54 | 34 | 9 | Drawing (pdf) |
H-434 | 55 gallons | 56 | 35 | 9 | Drawing (pdf) |
H-438 | 55 gallons | 56 | 36 | 9 | Drawing (pdf) |
H-268 | 60 gallons | 60.5 | 33 | 9 | Drawing (pdf) |
H-581 | 65 gallons | 60 | 32 | 10.5625 | Drawing (pdf) |
H-580 | 67 gallons | 62 | 33.5 | 10.125 | Drawing (pdf) |
H-524 | 76 gallons | 64 | 46 | 8.25 | Drawing (pdf) |
H-544 | 80 gallons | 37 | 22.5 | 18.75 | Drawing (pdf) |
Give us a call at 1-863-261-8388 or fill out our quote request form to discuss your roto mold project requirements.
How to Order your RV Holding Tank
Custom RV holding tanks are easily adaptable, with no pre-drilled holes that limit your options. You can decide where to place the holes and fittings on your tank to suit your space and needs, ensuring a perfect fit.
To get started, just follow these steps:
- Fill in a tank drawing with the dimensions and features of your desired tank. Indicate on the drawing where you want the ports on your tank to be located. Try to be as accurate as possible with the measurements. Use the contact us form (or email) to send the drawing to us. Send them to us using email or the contact form on this wesbsite please.
- Our team will review your drawing and get in touch with you to discuss it further. We will offer you feedback and suggestions to improve your design.
- We will work with you until you are happy with the final design, and then we will process your order.
- We recommend that you provide us with the most detailed information you can about the sizes and locations of your tank components. If you are unsure about anything, don't worry - our team is here to assist you and make any changes you require.

*Mounting straps are not included with this tank, and it is not for use with gasoline fuel storage. If you need a different type of tank, our team can help you find the right custom tank to fit your specific needs.
Need pricing for marine water tanks? Give our sales team a call at 1-863-261-8388 or fill out our quote request form to discuss your boat tank project requirements.
Roto Molded RV Holding Tanks
Enjoy peace of mind and comfort with this extraordinary RV holding tank—the embodiment of strength, seamlessness, and unwavering longevity. Thes tanks are meticulously crafted utilizing the cutting-edge technique of roto molding. This innovative manufacturing process involves heating and spinning the finest polyethylene resin available within a precision mold, resulting in a flawlessly smooth and uniform wall formation. The temperature is carefully regulated throughout the process to ensure optimal quality and deliver a tank that is built to endure the test of time. Tanks created through this method exhibit exceptional sturdiness, rendering them virtually indestructible, with no seams or vulnerable points susceptible to breakage or leakage. Embrace the remarkable resilience of the custom RV holding tanks, engineered to withstand the most daring adventures without compromise.
RV Accessories
At One Clarion, we provide custom water tanks for your RV that match your exact dimensions and needs. We can also add spin-weld fittings if you need them. We also carry protective battery boxes, and custom storage solutions. No matter what size or shape you need for your project, we can tailor your RV water tank to suit your needs.

A secure & perfect fit with Spin-Weld Fittings
Unlock dependable and secure connections with these polyethylene fittings, meticulously crafted using state-of-the-art spin welding technology. This cutting-edge process guarantees the formation of resilient and enduring joints that are completely impervious to leaks and resistant to breakage. Every fitting undergoes meticulous manufacturing to ensure a flawless match with your individual tanks, providing a precise and steadfast connection that withstands the test of time. These fittings, designed for both holding and fresh water tanks, are meticulously fabricated utilizing the spin welding process. This results in the creation of robust and long-lasting permanent joints, delivering unmatched leak resistance and durability. We take pride in tailoring fittings specifically for your unique tanks, ensuring an impeccable connection fit that instills confidence.
Versatile Compartments
Expand the storage capacity of your RV to its fullest potential with our versatile range of compartments. Select from a diverse array of options, including rounded corner open-ended, square corner open-ended, and square corner top and end compartments, all available in a variety of sizes. These intelligently designed compartments offer convenient storage solutions, enabling you to effectively organize your possessions. Discover our extensive assortment of sizes and shapes, ensuring you find the ideal compartments that perfectly cater to your requirements.
Battery Boxes for Optimal Protection
Enhance the safety and longevity of your battery with these premium battery boxes. Designed to shield against tipping, accidental short-circuiting, and corrosion, these robust boxes provide optimal protection for your valuable battery. Not only do they ensure the secure containment of your battery, but they also act as a reliable barrier against potential harm. Explore our diverse range of battery box sizes, enabling you to discover the precise fit for your marine battery.Sustainable Custom Plastic Storage Solutions

At One Clarion, we prioritize sustainability. These custom plastic RV tanks offer an environmentally friendly solution for water storage. Manufactured with non-toxic materials, these tanks contribute to low carbon emissions throughout their life cycle. Built to withstand corrosion, leak-proof, and resistant to UV damage, these tanks outlast others in longevity and durability. By choosing flexible and cost-effective custom RV water tanks, you actively reduce your carbon footprint while enjoying reliable water storage.
Experience the Difference with One Clarion
Whether you're looking for a custom RV holding tank, or a water tank for your RV, or any other style of custom RV water tank, we have the solution. These tanks are built to last, and are priced to sell. See for yourself and call us!
Other Products
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Custom Rotomolded Tanks | Camper Black Water Tanks | RV Water Tanks |
Questions? We can help! Call us at 1-863-261-8388 or request a price quote.