The last picture asks if i need a different size do you do custom sizes? what i would like is the profile of the 21g, but shorter such that its only10

The 21 gallon tank measures roughly 9" x 17" x 43" The 10 gallon tank measures roughly 10" x 15" x 21" With that being said the 21 and 10 are very similar in the length and width. The height is just scaled down but roughly 22" to reduce the overall volume. Thanks

What sizes are the threaded connections? It looks like theres 3 blue ones and one red one? Are those the only openings?

3 of the ports (blue ones) are 3/8 threaded NPT female Typically a threaded barb connector is screwed in to attach reinforced vinyl tubing with a hose clamp. A blue blue one with the 1.25 size (red one) should be on the high side of the tank when mounted and the blue one is attached to a vent tubing. The other two blue ones mounted at the bottom of that side. One has a tubing going to drain valve. The other is typically vinyl tubing to the input side of a 12VDC RV water pump. The large Red one) is a 1.25 inch. No threads. For use with a slip over flex tubing with a hose clamp for a gravity feed fill tube. Ideally this red port should be on the high side when you mount the tank.

If I’m using this as a gray water tank, how do I drain the water out of it? What equipment do I need for that?

The tank has many 1/2” threaded holes so you can mount it many ways. Use one of the 1/2” holes and add water line and off/on valve to it. We use Pex waterline from Hdepot. Or you could use clearctubing

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💧 Stay hydrated on the go with leak-proof confidence!

DURABLE SEAMLESS DESIGN - Rotationally molded polyethylene ensures no leaks or bursts—built to last.
VERSATILE CONNECTION PORTS - Equipped with one 1.25" fill inlet and three 3/8" NPT fittings for flexible installation.
SPACIOUS 16 GALLON CAPACITY - Ideal for extended RV trips or marine adventures without constant refills.
NON PRESSURIZED VENT READY - Designed for vented systems to prevent damage—perfect for professional-grade setups.
BPA FREE CORROSION RESISTANT - Safe for fresh water storage and resistant to stains, rust, and corrosion for long-term use.

This 16 gallon BPA-free fresh/gray water tank features a durable, seamless polyethylene build with multiple connection points, designed specifically for RVs, horse trailers, and marine use. Its corrosion-resistant, non-pressurized design ensures safe, reliable water storage for professionals and enthusiasts alike.

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