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RV Fresh Water Tanks

Safe Drinking Water Storage

Fresh Water Tank DrawingExplore unbeatable prices for RV fresh water tanks, available in nearly all sizes. When it comes to superior quality and outstanding performance, your search ends here. These custom RV water tanks are meticulously crafted using FDA-approved virgin polyethylene plastic resins and are nearly unbreakable.

Gain peace of mind on your travels with our RV freshwater tanks. Engineered for durability and strength, they outlast any other tanks available in the market. Constructed as a single solid piece, our tanks are thick, seamless, and completely free from worries about contamination or leaks. Designed to withstand the test of time, our tanks provide a long-lasting solution. For a perfect fit and secure connection, we offer customization options for dimensions and incorporate spin-weld fittings to ensure a secure plumbing connection.

Common sizes: 40 gallon rv fresh water tank, 50 gallon rv fresh water tank, 100 gallon rv fresh water tank.  But also available in many more sizes.  See charts below to find the perfect fit!


Custom RV Water Tanks - Certified for Safety

Our fresh water RV tanks comply with FDA regulation CFR 177.1520, making them perfectly suitable for storing drinking/potable water. With tank walls that are 3/8" thick, you’ll enjoy exceptional strength and an extended service life with this rv water tank. When your project demands unique sizes or shapes, our dedicated team is ready to assist you in finding the ideal RV fresh water holding tank that matches your specific needs.


Bow Shaped RV Water Tanks

bow shape tank
Part No. Capacity Length Width Depth Drawings
W-367 8 gallons 19.5 13.5 7.5 drawing (pdf)
W-370 12 gallons 24 15 12 drawing (pdf)
W-366 15 gallons 36 13.5 7.5 drawing (pdf)
W-361 16 gallons 15 25.25 13 drawing (pdf)
W-365 25 gallons 59 13.5 7.5 drawing (pdf)
W-363 35 gallons 66 15.5 9.81 drawing (pdf)
W-359 56 gallons 90 17.5 12 drawing (pdf)
W-360 56 gallons 90 17.5 12 drawing (pdf)

L Shaped RV Water Tanks

l shape tank
Part No. Capacity Length Width Depth Drawings
W-14 7 17 9.5 19 ask for details
W-283 31 54 9 13.5 drawing (pdf)
W-278 31 96 19 8 drawing (pdf)
W-377 32 44 18 14.25 drawing (pdf)
W-432 32 45 18 10.5 drawing (pdf)
W-311 35 52 38 4.5 drawing (pdf)
W-454 36 108 14.5 5.75 drawing (pdf)
W-346 38 81 35 6 drawing (pdf)
W-286 39 59 36 4.5 drawing (pdf)
W-252 40 45.5 15.5 18 drawing (pdf)
W-290 40 51 25.5 9 drawing (pdf)
W-269 40 53 24 9 drawing (pdf)
W-43 40 70 21 12.75 drawing (pdf)
W-458 40 87 24.5 8.75 drawing (pdf)
W-253 50 54 36 9 drawing (pdf)
W-39 50 71 17.25 12.25 drawing (pdf)
W-419 92 53 36.5 13.5 drawing (pdf)
W-385 93 39 36 20 drawing (pdf)
W-219 100 65 22.75 22 drawing (pdf)
W-436 100 76 62 8.5 drawing (pdf)

Rectangle Shaped RV Water Tanks

rectangular shape tank
Part No. Capacity Length Width Depth Drawings
W-364 2 gallons 9.75 9.75 6 drawing (pdf)
W-49 3 gallons 16 7.5 6.5 drawing (pdf)
W-77 5 gallons 15.5 15.5 5 drawing (pdf)
W-369 6 gallons 16 12 8 ask for details
W-354 6 gallons 17 12 8 drawing (pdf)
W-26 8 gallons 19.25 13 9.5 drawing (pdf)
W-306 8 gallons 36 16 4 ask for details
W-376 8 gallons 54 6 7 ask for details
W-245 9 gallons 17.625 15.625 8.25 ask for details
L-1 10 gallons 18 16 8 drawing (pdf)
W-53 10 gallons 24 14.5 7.5 drawing (pdf)
W-210 10 gallons 24 15.5 8 drawing (pdf)
W-33 10 gallons 31 15.5 6 drawing (pdf)
W-294 10 gallons 40 25 9.25 drawing (pdf)
L-2 12 gallons 24 16 8 drawing (pdf)
W-28 13 gallons 30 14 8.25 drawing (pdf)
W-355 15 gallons 17.75 14.75 14.75 drawing (pdf)
W-27 15 gallons 22.25 13 13 drawing (pdf)
W-327 15 gallons 23 16 11 drawing (pdf)
L-3 15 gallons 30 16 8 drawing (pdf)
W-97 15 gallons 33 21.5 5.75 ask for details
W-328 15 gallons 48.5 10.75 7.875 drawing (pdf)
W-282 16 gallons 30.125 17.25 8 drawing (pdf)
W-209 19 gallons 36 15.5 8 drawing (pdf)
W-51 20 gallons 21 17 14 drawing (pdf)
W-80 20 gallons 24 17.75 12 drawing (pdf)
W-368 20 gallons 24.5 15.5 13.5 drawing (pdf)
W-95 20 gallons 30 18 9 drawing (pdf)
W-81 20 gallons 33.25 17.25 8.75 drawing (pdf)
L-4 20 gallons 36 16 8 drawing (pdf)
W-320 21 gallons 21 21 12.5 drawing (pdf)
W-371 21 gallons 29 20 9 drawing (pdf)
W-268 22 gallons 35 14 12 ask for details
W-304 25 gallons 25 21 12 drawing (pdf)
W-45 25 gallons 27 20 12 drawing (pdf)
W-85 25 gallons 34 17.5 11 drawing (pdf)
W-20 25 gallons 42 16 10 ask for details
L-5 25 gallons 48 16 8 drawing (pdf)
W-201 25 gallons 52.5 12 10.75 drawing (pdf)
W-31 27 gallons 21 18 18 drawing (pdf)
W-2 27 gallons 35 15 13 drawing (pdf)
W-335 27 gallons 42.5 17.5 9 drawing (pdf)
W-285 27 gallons 44 17 9 drawing (pdf)
W-225 28 gallons 34.25 17.5 12 ask for details
W-207 28 gallons 35.25 15 13 drawing (pdf)
W-55 28 gallons 52 12 11 drawing (pdf)
W-323 29 gallons 25 24 12 drawing (pdf)
W-244 30 gallons 29.75 25.75 9.5 drawing (pdf)
W-30 30 gallons 32 20 12 drawing (pdf)
W-254 30 gallons 33 20 11 drawing (pdf)
W-292 30 gallons 34.5 18 12 drawing (pdf)
W-233 30 gallons 35.5 19 10.75 drawing (pdf)
W-32 30 gallons 42 28 6.5 drawing (pdf)
W-280 30 gallons 44 14 12 drawing (pdf)
W-338 30 gallons 45.5 22 7.75 drawing (pdf)
W-236 32 gallons 50.5 20 8 ask for details)
W-373 32 gallons 64 24 5.25 drawing (pdf)
W-237 33 gallons 30 16 16 drawing (pdf)
W-332 33 gallons 42 21.5 9 drawing (pdf)
W-234 34 gallons 48 21 8 drawing (pdf)
W-22 35 gallons 31.5 19.5 14.75 drawing (pdf)
W-316 35 gallons 33 28 9 ask for details
W-202 35 gallons 37 20 12 drawing (pdf)
W-75 35 gallons 69 11 11 drawing (pdf)
W-324 38 gallons 41.5 17.75 12.5 ask for details
W-266 38 gallons 47 17 12.125 ask for details
W-3 38 gallons 48.5 14 13 drawing (pdf)
W-205 38 gallons 58.5 16.125 10 drawing (pdf)
W-227 38 gallons 71.5 13 10 drawing (pdf)
W-259 39 gallons 28.375 18 17.5 drawing (pdf)
W-257 39 gallons 55 28 6.25 drawing (pdf)
W-248 40 gallons 31 26 11.75 drawing (pdf)
W-291 40 gallons 31.75 28 11.25 drawing (pdf)
W-307 40 gallons 33 22.5 13.5 ask for details
W-293 40 gallons 34 16 17 drawing (pdf)
W-313 40 gallons 38 25 11 ask for details
W-17 40 gallons 41 15.25 15.5 ask for details
W-284 40 gallons 41 21 11 drawing (pdf)
W-296 40 gallons 41 21 11 drawing (pdf)
W-204 40 gallons 42.25 27 9.5 drawing (pdf)
W-96 40 gallons 54 20 9 ask for details
W-295 40 gallons 54 23.5 8 drawing (pdf)
W-1 40 gallons 58 14 12 drawing (pdf)
W-226 40 gallons 58 21 8 ask for details
W-270 40 gallons 60 18 9.375 drawing (pdf)
W-314 40 gallons 60 18 9.375 ask for details
W-231 41 gallons 50 19 10 drawing (pdf)
W-48 41 gallons 60 28 6 drawing (pdf)
W-380 43 gallons 99 13.75 7.5 ask for details
W-250 44 gallons 38 17 16 drawing (pdf)
W-38 44 gallons 42 26.5 9.5 ask for details
W-309 44 gallons 60 31 5.75 ask for details
W-24 45 gallons 40 19 16 drawing (pdf)
W-35 45 gallons 42 20 13 ask for details
W-25 45 gallons 48 28 8 drawing (pdf)
W-264 45 gallons 64 24 7.5 drawing (pdf)
W-79 47 gallons 48 19.75 12 drawing (pdf)
W-279 48 gallons 72 20 8 drawing (pdf)
W-249 50 gallons 26 21.5 21 drawing (pdf)
W-275 50 gallons 45 26 10 ask for details
W-289 50 gallons 48 18 14.5 drawing (pdf)
W-318 50 gallons 51 28 8.375 ask for details
W-330 50 gallons 54.75 27 8 drawing (pdf)
W-208 50 gallons 57 36 6 drawing (pdf)
W-228 50 gallons 64 32 6 drawing (pdf)
W-271 50 gallons 68 13.5 13.5 drawing (pdf)
W-212 52 gallons 58 24 9 drawing (pdf)
W-12 53 gallons 30.25 24.5 17.25 ask for details
W-305 54 gallons 55 28 8.375 drawing (pdf)
W-403 55 gallons 45 23 12.75 ask for details
W-302 55 gallons 51 21 13 drawing (pdf)
W-4 55 gallons 60 20.5 11 drawing (pdf)
W-76 57 gallons 48 24 12 drawing (pdf)
W-300 60 gallons 48 21.5 14.5 drawing (pdf)
W-74 60 gallons 50 18 16 drawing (pdf)
W-276 60 gallons 53.5 21 13 drawing (pdf)
W-277 60 gallons 57 28 9 drawing (pdf)
W-37 60 gallons 70 26 8 ask for details
W-59 60 gallons 79.25 15.75 11.5 drawing (pdf)
W-331 62 gallons 50 32 9 drawing (pdf)
W-223 65 gallons 34 24 18.5 ask for details
W-362 65 gallons 39.75 23.75 16.25 drawing (pdf)
W-241 65 gallons 60 22 11.5 drawing (pdf)
W-220 68 gallons 42.5 39 9.5 drawing (pdf)
W-84 68 gallons 48.5 26 13 drawing (pdf)
W-213 72 gallons 34.5 23 21.5 drawing (pdf)
W-34 74 gallons 65 20.75 13 drawing (pdf)
W-251 80 gallons 59 49.5 7 drawing (pdf)
W-315 93 gallons 71 27 11.5 ask for details
W-218 95 gallons 41 25.25 22 drawing (pdf)
W-230 97 gallons 67 48 7 drawing (pdf)
W-214 98 gallons 52 26 17 drawing (pdf)
W-221 100 gallons 36 27.5 23.5 drawing (pdf)
W-101 100 gallons 50 40 12 drawing (pdf)
W-68 103 gallons 59.25 23.625 17.75 ask for details
W-63 105 gallons 46.5 33 16 drawing (pdf)
W-88 105 gallons 48 24 21.5 drawing (pdf)
W-60 105 gallons 79.25 27 11.5 drawing (pdf)
W-310 105 gallons 92 27.5 10 ask for details
W-308 107 gallons 94 27 9.75 ask for details
W-238 128 gallons 64.5 40 11.5 ask for details
W-347 132 gallons 65 38 12.5 drawing (pdf)
W-239 140 gallons 64.5 43.5 11.5 drawing (pdf)
W-272 142 gallons 60 43 13.75 drawing (pdf)
W-108 145 gallons 50 31.25 22 drawing (pdf)
W-69 145 gallons 69.75 44 11 ask for details
W-56 160 gallons 64.75 43 13.75 drawing (pdf)
W-345 163 gallons 65 30.5 19.25 drawing (pdf)
W-372 188 gallons 62 40 17.5 drawing (pdf)
W-476 300 96 30 24 drawing (pdf)
W-475 375 96 30 30 drawing (pdf)

Rectangle Shaped RV Water Tanks with Rails

rectangle shape with rails tank
Part No. Capacity Length Width Depth Drawings
W-78 25 47 22.625 6.5 drawing (pdf)
W-357 30 46.25 31.5 6 drawing (pdf)
W-235 30 54 22 6.5 drawing (pdf)
W-247 38 45 22 10.5 drawing (pdf)
W-356 40 57 35 6 drawing (pdf)
W-206 40 60.5 20.75 8.5 drawing (pdf)
W-336 45 56 30 7.75 drawing (pdf)
W-434 50 57 35 6.5 drawing (pdf)
W-342 52 58 31 7 ask for details
W-301 53 60 39.5 5.5 drawing (pdf)
W-337 54 54.5 28.5 9 drawing (pdf)
W-216 55 67 32 7 drawing (pdf)
W-232 57 56.625 28.5 9 drawing (pdf)
W-333 57 57 28.5 9 drawing (pdf)
W-334 66 42.5 39 10 drawing (pdf)
W-341 72 60 53 5.5 ask for details
W-340 90 60 52.5 7 drawing (pdf)
W-439 97 57 39.5 11 drawing (pdf)
W-348 100 65 39.5 9.875 drawing (pdf)
W-352 105 60 39.5 11 ask for details

Wedge Shaped RV Water Tanks

wedge shape tank
Part No. Capacity Length Width Depth Drawings
W-358 8 gallons 19.75 17.75 8 drawing (pdf)
W-375 17 gallons 24.5 22 9 drawing (pdf)
W-274 65 gallons 69 24.25 10.75 ask for details
W-273 70 gallons 73.75 24.25 10.75 ask for details
W-211 72 gallons 61.75 24 13 drawing (pdf)
W-281 81 gallons 70 26.75 11.75 drawing (pdf)
W-349 82 gallons 48 40.5 11 ask for details
W-224 88 gallons 73.75 24.25 12.75 ask for details
W-353 93 gallons 59 36.5 11.375 drawing (pdf)
W-303 97 gallons 73 24.75 14 drawing (pdf)
W-215 100 gallons 78 26 14 drawing (pdf)
W-99 105 gallons 60 40.5 11.25 ask for details
W-374 107 gallons 76 38.5 10.125 ask for details
W-350 108 gallons 76 40 10 ask for details
W-378 110 gallons 57 32 16 ask for details
W-93 150 gallons 67.5 40.5 14.25 drawing (pdf)


Seamless Integration and Optimal Efficiency

Experience the exceptional strength and durability of our custom water tanks. Designed with a one-piece roto-molded construction, our tanks are incredibly robust, eliminating the risk of cracks and leaks. Featuring female NPT openings and spin-weld fittings, our tanks seamlessly integrate into your RV plumbing system, making installation a breeze.

 rotomolding process graphic

Easy Ordering Process

At One Clarion, we recognize the uniqueness of every RV, which is why we offer the flexibility to design and create a custom RV fresh water tank based on your precise specifications. With no pre-drilled holes limiting your choices, you have the freedom to determine the placement of holes and fittings on your tank, ensuring a perfect fit for your space and requirements.

Here's a straightforward step-by-step guide to help you get started:

  1. square shape tank with fixtures marksComplete a tank drawing with accurate dimensions and desired features. Indicate the preferred port locations on the drawing.
  2. Our dedicated team will carefully review your drawing and promptly get in touch to discuss it further. We'll provide valuable feedback and suggestions to enhance your design for optimal functionality.
  3. We'll work closely with you until you're fully satisfied with the final design. Once approved, we'll promptly process your order, ensuring a seamless experience from start to finish.
  4. To ensure precise fulfillment of your requirements, it is highly recommended to provide detailed information about the sizes and locations of your tank components. If you have any uncertainties or require adjustments, our team is readily available to assist you throughout the process.

Please note that mounting straps are not included with this tank, and it is not suitable for gasoline fuel storage.

If you require a different type of tank, our team is more than capable of helping you find the perfect custom solution to meet your specific needs. Experience the convenience and reliability of a custom-designed RV water tank today. Let us bring your vision to life and deliver a superior water storage solution tailored exclusively for you.

RV Accessories

At One Clarion, we understand the importance of customizing your RV experience to match your unique needs and requirements. From spin-weld fittings to versatile compartments and battery boxes, we have everything you need to go along with your RV fresh water tank.

white fittingSpin-Weld Fittings for Secure Connections
Achieve reliable and secure connections with our polyethylene fittings, expertly crafted using state-of-the-art spin welding technology. Through this advanced process, we ensure the creation of robust and long-lasting joints that are completely leak-proof and resistant to breakage. Our fittings are meticulously manufactured to match your specific tanks, guaranteeing a precise and secure connection that will endure over time.

white fittingVersatile Storage
Make the most of your RV's storage capacity with our diverse range of compartments. Whether you prefer rounded corner open-ended, square corner open-ended, or square corner top and end compartments, we have various sizes available to suit your needs. Thoughtfully designed, these compartments offer convenient storage options, allowing you to efficiently organize your belongings. Explore our comprehensive selection of sizes and shapes to discover the perfect compartments for your requirements.

See: Custom Storage Compartments

white fittingBattery Boxes for Protection
Ensure optimal protection for your marine battery with our selection of battery boxes. These sturdy boxes not only keep your battery securely in place but also shield it from potential hazards such as tipping, accidental short-circuiting, and corrosion. Browse through our range of available battery box sizes to find the perfect fit for your marine battery, offering you peace of mind and maximum battery longevity.

Sustainable Water Storage Solutions

eco-friendly logoAt One Clarion, we prioritize sustainability. Our custom plastic RV tanks offer an environmentally friendly solution for water storage. Manufactured with non-toxic materials, our tanks contribute to low carbon emissions throughout their life cycle. Built to withstand corrosion, leak-proof, and resistant to UV damage, our tanks outlast others in longevity and durability. By choosing our 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 40 gallon RV freshwater tank, a 50 gallon RV Freshwater Tank, a 100 gallon fresh water tank, or any other size 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!


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