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A.A

A.A 42 Gallon RV Fresh/Gray Water Tank 39" x 18" x 14" - BPA Free (42 Gallon)

  • Based on 857 reviews
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Availability: In Stock.
Fulfilled by Amazon

Arrives Saturday, Aug 29
Order within 19 hours and 22 minutes
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Size: 42 Gallon


Features

  • This 42 gallon water tank measures 39" x 18" x 14" (not including fittings)
  • All tanks come with (1) 1.25" water fill inlet and (3) 3/8" NPT connections. Non-Pressurized Tank - The tank must be vented
  • These rotational molded fresh water tanks are made from a high quality durable polyethylene material.
  • One piece seamless construction - No Seams to burst
  • Stain, corrosion and rust resistant features make them ideal for replacement or OEM installation on RVs, horse trailers or marine products.

Description

Concession & Food Vendors You must verify requirements with health department where inspection will be made before purchasing. Verify Requirements on Fresh Water Tank, Gray Water Tank, fittings, drainage, and mounting placement. Preparation of The Water Tank As with any food related purchase sanitize each tank prior to use. There may be debris to remove from the manufacturing process. Wipe with damp cloth to remove surface dust or scuffs from the warehouse. Installation Tips For The Water Tank -This is a Non-Pressurized Water Tank that must be vented allowing air in and out when in use. -The purchase of additional fittings to install the tank and connect water lines will needed. -Do not hook a pressurized garden hose directly to tank without venting it, damage can and will occur. -Do not over-tighten fitting on top the water tank, damage can and will occur. -We stock many different fill dishes and food grade water fill hoses, check out our stock for more information. -It is recommended to have a certified technician install all parts to prevent tank damage -There are no installation instructions included. Mounting & Bracing The Water Tank -Place tank on level surface and brace to prevent the water tank from shifting or moving during transit. -Do not hang tank by straps, as this can damage the water tank. -Do not place weight on top of the water tank. Warranty -Cutting or modifying the tank in any way voids any/all warranty. Using this tank for any purpose other than fresh or gray water storage will void any/all warranty. Tank Measurements -14” x 18” x 39” Longest Length (not including fittings) -Rotate the tank to change height or width -Average thickness 1/8” +/- -The fittings are roughly 2.5" long -All measures are within +/- 0.5" Water Tank Fittings -(1) 1.25" Water Fill Inlet -(3) 3/8" NPT Connections.

Brand: A.A


Color: White


Material: Polyethylene (PE)


Product Dimensions: 39"L x 18"W x 14"H


Capacity: 42 gallons


Brand Name: A.A


Unit Count: 1 Count


Number of Items: 1


UPC: 701231042356


Manufacturer: Automotive Authority LLC


Manufacturer Part Number: FWT-RV


Item Dimensions L x W x H: 39"L x 18"W x 14"H


Capacity: 42 gallons


Color: White


Shape: Rectangular


Material Type: Polyethylene (PE)


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Aug 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Works great for our camper.
Size: 16 Gallon
I recently ordered the 16 Gallon RV Fresh/Gray Water Tank (24" x 15" x 10") to replace the tank in our camper, and I couldn’t be happier with our choice! Right from the start, this tank impressed us with its quality and performance. The size is absolutely perfect for our needs. It fits seamlessly into the designated space in our camper, and we had no issues fitting it into place. This was a concern for us, as we wanted something that would not only work well but also fit snugly without any modifications. Installation was a breeze! I appreciated how straightforward the process was, with clear instructions that made it easy to hook everything up. Within no time, we were fully operational and ready for our next camping trip. The tank’s design allows for easy access to all necessary attachments, which simplifies the installation process significantly. Durability is another major advantage of this tank. It's made from BPA-free materials, which gives me peace of mind knowing it's safe for fresh water use. The construction feels incredibly sturdy, and I’m confident it can withstand the rigors of camping trips, from rough terrains to temperature changes. Overall, I highly recommend the 16 Gallon RV Fresh/Gray Water Tank to any RV or camper owner looking for a reliable and high-quality replacement. Its perfect size, easy installation, and durable build make it an excellent choice. Thanks to this tank, we’re all set for many more adventures on the road! ... show more
Reviewed in the United States on December 5, 2024 by Sean

  • Works Great
Size: 42 Gallon
My 42 Gallon tank works great and if I had to buy another one, I will the price is just right for my budget.
Reviewed in the United States on February 5, 2026 by Amazon Customer

  • Smooth operation and solid feel.
Size: 10 Gallon & 16 Gallon
Smooth operation and solid feel.
Reviewed in the United States on March 16, 2026 by Dr. Jalyn Mraz

  • Very nice tank !
Size: 16 Gallon
Very nice tank, well constructed and fitting are perfect.
Reviewed in the United States on December 28, 2025 by Harold W

  • Odd Sizes
Size: 10 Gallon
We purchased the 10 gallon water tank for our van conversion, it fits well under the sink in our cabinets and it seems to be good construction. This gets 4 stars for one reason: the oddball sizes. the fill port is 1.25 inches which is a really weird size to try to find at the hardware store (it’s fine if you’re plumbing it to a full spout on the exterior of the vehicle but if you have different intentions it’s nearly impossible to plumb anything else off the fill spout. We ended up getting a mechanical tester plug that we can remove when we fill the tank up) the other three ports are 3/8 npt which proved to be challenging to find at the local hardware stores. Thankfully ace hardware had 3/8” mpt to 1/2” barb in stock but that was the last store I checked at. Kinda strange they wouldn’t use 1/2” npt which is much more available. ... show more
Reviewed in the United States on July 1, 2024 by Amazon Customer

  • Well Made
Size: 16 Gallon
Well made and durable. Just the right size and configuration.
Reviewed in the United States on November 24, 2025 by Mike Williamson

  • Well built.
Size: 16 Gallon
These tanks arrived just as advertised. The size was correct and the fittings were in the place that I needed them. I got two of these to replace the water bladder in my Hunter 25 sailboat. The space for the water bladder was such that two tanks side by side will give me a nice 32 gallons of available water instead of 10 from the old bladder. I suspect I will have no issues while out sailing. ... show more
Reviewed in the United States on January 12, 2024 by Alex

  • Bulging 2-3” each direction
Size: 30 Gallon
Right out of the box, it was bulging as much 2 inches on every single side. It does NOT lay flat! If you’re tight on space or ordered this to fit somewhere specific, keep in mind that the dimensions are going to be off by a couple inches because of the bulging and you must strap it down since it won’t lay flat. I pulled the red plug and it deflated a bit. But still bulging like crazy! ... show more
Reviewed in the United States on July 18, 2026 by Hsquared

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