The Enduraplas 340 Gallon Vertical Rainwater Harvesting Tank (SKU TLV00340-RH) is a compact, above-ground polyethylene reservoir built to bank captured roof runoff for irrigation, garden supply, and non-potable outdoor reuse. It stands 74 inches tall on a 40 x 40 inch footprint, so it tucks against a wall or into a corner while still holding a meaningful 340 gallons. As a vertical storage tank, it drains cleanly and shows its level easily on a small pad. Suitability for potable or NSF-rated water storage is not listed for this SKU, so plan it for non-potable harvesting service.
Will it work for your site?
Match the tank to your catchment before you buy. A full 340 gallons of water weighs 2,836 pounds, and that entire load sits on the 40 x 40 inch base, so the ground or pad under it has to carry roughly 2,800-plus pounds without settling or tilting. Level, continuous support across the full footprint is what keeps a vertical poly tank from stressing at the base over time. If you are not sure 340 gallons is right for your roof area and rainfall, run the numbers with our Tank Sizing Calculator and the Tank Sizing Guide first. For a deeper walkthrough of harvesting capacity, first-flush handling, and by-state rules, see our guides on rainwater tank sizing by state and first-flush diverter sizing. Use the technical drawing on this page to confirm the tank height and footprint clear your intended location and any overhead obstructions.
Foundation and cold-climate notes
For a stable, long-lived install, set this tank on a proper base rather than bare soil that can wash out or heave. Our guide on concrete pad sizing for above-ground polyethylene tanks lays out the framework for supporting a load this heavy. In freezing climates, plan for freeze protection or seasonal draining so a full tank does not ice up over winter.
The mistake to avoid
The common error on a vertical harvesting tank this size is underbuilding the base. Nearly 2,836 pounds of water concentrated on a 40 x 40 inch footprint puts a lot of weight in a small area, and a soft or uneven pad will let the tank lean. Get the foundation right first, then plumb your inlet and overflow. Fitting and gasket configuration is not listed for this SKU, so call 866-418-1777 to confirm inlet, outlet, and overflow ports before you order plumbing parts.
This tank ships LTL freight, quoted separately to your delivery ZIP. Get a live rate with our Freight Cost Estimator, or call 866-418-1777 for help sizing, siting, and scheduling delivery of your rainwater harvesting tank.
