Marine Holding Tanks
Boat Water Holding Tank
One Clarion has the ultimate marine holding tank, designed for maximum strength and a custom fit. These marine water holding tanks are made from one-piece and are seamless, designed to keep your water safe from contamination and leaks. These strong and durable tanks are customized to fit your dimensions perfectly, with spin-weld fittings to make sure you have a precise plumbing connection. Molded with FDA-approved virgin polyethylene plastic resins, our high-quality marine water tanks are ideal for marine boat tanks, graywater tanks, RV tanks, ballast tanks, and more.
Plastic marine holding tanks comply with both FDA regulation CFR 177.1520 and Coast Guard Standards, ensuring you have appropriate potable water storage for your boat. Our custom holding tanks have 3/8" thick walls, providing longer tank life. Knowledgeable team members can help you get the exact fit you need for your marine tank! Call us today.
Marine Holding Tanks
We are committed giving you the highest quality marine tanks on the market! Designed with as a one-piece tank, these tanks are durable and practical. Our boat water tanks are seamless so they don’t crack or weaken over time. The FDA-approved, virgin polyethylene resin is roto molded, giving you the best possible tank for storing water in boats and marine vessels, including yachts, sailboats, or deep sea fishing boats. Tanks have female NPT openings in the same position on one end, giving you the option to use with any marine plumbing. Both cost effective and eco-friendly, our custom holding tanks have spin weld fittings to for a perfect tank fit.
Custom Marine 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 Marine 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 Marine 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 Marine 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 Marine 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 Marine 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 Marine 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 Marine 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 Marine Holding Tanks
Recessed Side Dump Holding Tanks with Rails
Custom Marine 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 Marine 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) |
Why Use Rotational Molding for Marine Water Tanks?
A unique type of tank fabrication, rotational molding is ideal for marine water tanks. Heating virgin, polyethylene resin inside a hollow, closed mold makes the one-piece tank. The resin at temperatures range from 260°C to 370°C to evenly coated the mold with resin. Centrifugal force during rotation produces a smooth, watertight product with even, consistent walls. Roto mold tanks have a longer life expectancy than other fresh water tanks and are strong, durable, and meet potable water specifications.
Our Marine Water Tank Ordering Process
We want to work with you for an efficient marine tank ordering process. Our custom tanks are completely without pre-drilled holes, providing a blank canvas to cut holes and fittings exactly where you need them. Our custom boat water tank are able to rotate or move to fit your specific space.
- 1.- Begin by filling in a tank drawing with your particular tank dimensions and specifications.
- 2.- Our team will review your drawing and contact you with suggestions and feedback for the best tank fit.
- 3.- We work with you until the design is exactly what you need, and then processes your order.
- 4.- Although we encourage you to provide the most specific information available to fit tank sizes and locations, if you're not sure about all the details, we are happy to help guide you through the process.
*Mounting straps are not included with this tank, and it is not for use with gasoline fuel storage. If you are looking for a different type of tank, our team can help you find the right custom tank to fit your specific need.
Marine Water Tank Accessories
We offer custom boat water tanks that fit your specific dimensions and location. We also install spin weld fittings upon request for permanent connections. Let us make sure you have a successful project, whether you need a unique size or shape. We customize your marine water tank to accommodate your needs.
Polyethylene fittings for graywater and holding water tanks are made with a spin welding process. Strong and durable, spin welding creates fittings that won’t leak or break. We make our fittings for your specific tank, ensuring a precise and permanent connection.
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 a wide selection of sizes.
Battery boxes are available to store your marine batteries. Keep battery from tipping or accidentally shorting out, as well as protecting your battery from corrosion.
Sustainable Custom Plastic Marine Storage
Custom plastic marine holding tank gives you a sustainable solution for environmentally friendly water storage. Manufactured with non-toxic material, water 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 boat water tanks. Reduce your carbon footprint with our flexible, cost-effective plastic marine tanks.
No matter which marine water tank you choose, we are committed to customizing the exact size, shape, or capacity you need. Let our team help you decide with customizing your perfect water tank.
Ask us for more information on custom marine water tank or our other available custom tanks!
Marine Holding Tank Frequently Asked Questions
Marine Holding Tank FAQs
Our custom marine holding tanks are great for marine boat tanks, graywater tanks, RV tanks, ballast tanks, and more. The roto molded FDA-approved virgin, polyethylene tanks are leak proof and corrosion resistant, making them an ideal choice for a variety of uses. Our high-quality marine water tanks last longer that many competitor tanks making them a cost-effective option.
Our boat tanks have spin weld connections that won’t break or leak. The spin welding process joins polyethylene fittings to your tank with surface friction concentrated in a circular weld joint. The fitting is spun relative to the tank while force is applied, causing the plastic to heat and melt, creating a permanent fitting. It can be made so your tank’s connection is perfect for your marine plumbing. The simple and highly energy efficient process is fast, strong and cost less than other fittings.
