Elkhart Plastics

91 Gallon RV Water Tank 55 x 55 x 7 1/2 Elkhart Plastics EPI 4389

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  • 91 Gallon RV Water Tank 55 x 55 x 7 1/2 Elkhart Plastics EPI 4389
  • 91 Gallon RV Water Tank 55 x 55 x 7 1/2 Elkhart Plastics EPI 4389



When it comes to installing the best tank for your RV, in this case, it's hip to be square. A perfectly square tank with amazing capacity for your RV, concession trailer, small home, apartment, fifth wheel, concession stand, toy hauler, and horse trailer.

Blank tanks like the EPI 4389 have a wide range of applications. This quality tank can be used as a fresh water or gray water tank. If you have a food-based RV, trailer, or truck you can purchase a set for your vehicle and because of the simple and low-profile construction, these can easily be fit into your space.

These tanks come complete with baffles. The importance of internal baffles cannot be understated. Especially in such a large capacity container. Baffles break up water travel in side of your tank. This is crucial when you have so much water in containment. Without baffles the water will slam into the sides of the tank as you travel. While the EPI 4389 has walls thick enough to stand up to such punishment, the tank can shift back, and forth which could be detrimental to the plumbing. The cost of repairs could be hefty if this happens.

It's hip to be square when you get a tank from RecPro!


  • Dimensions: 55" L x 55" W x 7 1/2" H
  • Dimensions: (wall) 0.180” T
  • Low profile
  • Capacity: 91-gallons
  • Color: Opaque
  • High-density plastic
  • Material: Polyethylene
  • Blank tank
  • EPI manufactured tank
  • Custom tank with lead time
  • Non-adhesive surface
  • Accessories available on website
  • Fittings kit available
  • BPA free
  • NSF Certified
  • Internal baffles to stop water travel
  • Made in USA

*Blank tank only - does not include intake or overflow port fittings. Fittings Kit is optional.*

Optional Fittings Kit includes:

  • (2) 1/2" grommets (requires 1 1/4" hole saw)
  • (2) 3/4" grommets (requires 1 1/4" hole saw)
  • (2) 1" grommets (requires 1 3/4" hole saw)
  • (1) 1 1/2" grommets (requires 2 1/2" hole saw)
  • (1) 2" grommets (requires 3" hole saw)
  • (6) water level sensors
  • Color: Natural white

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