Custom RV Holding Tanks
Strong Poly Tanks for Water Storage
If you need a high-quality custom RV holding tanks, you've come to the right place. These custom RV water tanks are made from FDA-approved virgin polyethylene plastic resins, which are suitable for RV freshwater tanks, RV holding tanks, marine boat tanks, graywater tanks, ballast tanks, and more. Our tanks are seamless and one-piece, so they are extremely strong, and you don't have to worry about contamination or leakage. We can customize our tanks to your dimensions and spin-weld fittings to ensure a perfect fit and connection for your custom RV holding tanks.
RV fresh water tanks comply with FDA regulation CFR 177.1520 and Coast Guard Standards making them suitable for drinking/potable water storage. Completely enclosed, our custom RV water tanks have 3/8" thick walls, making your tank strong for a long service life. Let us help you with projects requiring a unique size or shape to make sure you have the right tank fit.
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Custom RV Holding Tanks
These custom water tanks for RVs are made from high-quality polyethylene plastic resin that is FDA-approved and safe for drinking water. You can use them in RVs, boats and marine vessels of any kind. They are very strong and practical, with a one-piece roto-molded design that prevents cracks and leaks. They have female NPT openings that fit any RV plumbing system. They are also economical and eco-friendly, with spin weld fittings that ensure a perfect fit for your tank.
One Clarion is committed providing you with the highest quality and best priced RV Holding tanks on the market!
Custom 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 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 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 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 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 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 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 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 RV Holding Tanks
Recessed Side Dump Holding Tanks With Rails

Custom 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 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.
Custom Water Tanks for RV - Process
If you need a custom RV water tank, we can help you design and create it according to your specifications. These custom RV water 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.
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.
- 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.
Roto Molding for RV Holding Tanks
Imagine a water tank that is strong, seamless and built to last. That's what you get when you choose our RV holding tank. We use a special technique called roto molding to create your tank from the finest polyethylene resin. This resin is heated and spun inside a mold that shapes it into a smooth and even wall. The temperature is carefully controlled to ensure the best quality and a tank that will go the distance. You will love this custom RV water tanks that can withstand any adventure.
RV Holding Tank 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. No matter what size or shape you need for your project, we can tailor your RV water tank to suit your needs.
Polyethylene fittings for holding and fresh water tanks are made with a spin welding process. This produces a strong, durable permanent joint link that won’t leak or break. We make fittings for your specific tanks, ensuring a precise connection fit. | ![]() |
We also offer a variety of compartments, including rounded corner open ended, square corner open-ended, and square corner top and end compartments in a variety of sizes. See our available compartments sizes and shapes |
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We have a variety of battery boxes available for your marine battery to keep it from tipping or accidentally shorting out. It also protects your battery from corroding. See our available battery box sizes. |
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Sustainable Custom Plastic Storage
Custom plastic RV tanks give a sustainable solution for environmental friendly water storage. Manufactured with non-toxic material, tanks have a low carbon emission during their life cycle. Our tanks can withstand corrosion, are leak proof, resist UV damage, and last longer than other tanks. Reduce your carbon footprint with our flexible, cost-effective custom RV water tanks.
Request A Free Quote!
Questions? We can help! Call us at 1-863-261-8388 or
request a price quote.
The Custom RV Holding Tank provides a wide range of customization for your tank size, shape and fit. We create the perfect fresh water tank for your boat. Talk with one of our team members to find out more about our custom boat water tanks and other marine tanks to fit your project needs.
Other Products
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