21 Gallon Plastic RV Holding Tank

Manufacturer Part
This is a holding tank which is rotomolded using polyethylene plastic resins. It that can be used for greywater and blackwater storage. It has a 1/4" - 3/8" wall thickness. If requested, a custom tank can be created for your project.

Accuracy of the images may vary. Refer to the specifications table to ensure precision.

21 Gallon Rv Holding Tank - Septic & Waste

 R-78H, 21 gallon rv holding tanks are built for rugged use and made to last. Rv holding tanks can be used for rv toilet (head) holding tanks, greywater and blackwater situations.

  •   Perfect for storage of septic or waste water on rvs, campers, motorhomes, travel trailers.
  •   Rotomolded using polyethylene plastic resin. (Great alternative to abs tanks)
  •   Tanks come standard with premolded outlet only (typically 3" unless noted in the image), additional fittings will be installed per your request (Any Location, Any Size).

*Mounting straps are not offered on this item.
*Not intended for gasoline fuel storage.
*If needed we will create a custom tank for your project.
Technical Drawings
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Key Specs
Gallon Capacity 21
Lid Size 5"
Length 80"
Width 20"
Height 5"
Weight 34lbs
Material Polyethylene
Manufacturer Ronco Plastics
Manufacturer Part Number 78H
Warranty 3 years years
Disclaimers Any modification to the fittings installed on this tank will result in additional cost.
Shipping Height 5"
Shipping Length 81"
Shipping Weight 34lbs
Shipping Width 20"
Ship Class UPS