Norwesco 575 Gallon Underground Water Storage Cistern Tank

Where this tank goes

A cistern goes in the ground when you want the water out of sight, out of the sun and out of the way: rainwater collection off a roof, a reserve for a low yielding well, irrigation water, or a hauled water supply for a cabin or a site office. Underground, the water stays cool and dark, which keeps algae down without a black tank. Five hundred and seventy five gallons is a modest reserve; it suits a garden, a small roof catchment or a buffer between a slow well and a pressure pump. For a whole house or fire reserve, go up a size or put two in. Burial depth, bedding and backfill follow Norwesco's installation instructions for this tank; ask us for them before you dig, and keep vehicles off the area above the tank unless those instructions say otherwise. Our guide to rainwater, grey water and condensate reuse storage covers how a cistern fits into a reuse system, and the fire water reservoir guide for rural and remote sites covers sizing a reserve. For the volume itself, use the tank sizing calculator and the tank sizing guide.

Openings, risers and fittings

1. Manway. A 20 inch manway cover on top. It is the access for the pump, the float and inspection, and the riser mounts here.
2. Risers and extensions. Norwesco offers these for the one manhole, one per tank: N-63832 6 inch extension, N-63833 15 inch extension, N-63834 24 inch extension, N-63831 23 inch riser with a 12 inch lid, N-63830 36 inch riser with a 6 inch lid. Measure from the top of the tank to finished grade and tell us the number; we put the riser on the same order so the opening finishes at grade on the first try.
3. Inlet and outlet. Norwesco lists no factory inlet or outlet fitting on this tank. Tell us the pipe sizes for the inlet, the overflow and the pump line when you order and we will confirm what the wall takes. Dry fit every bulkhead fitting before tightening; a fitting below grade is a fitting you do not want to dig up.
4. Drawing. Norwesco's drawing for this tank, linked under Technical Drawing on this page, shows the manway position and the flat wall areas for fittings.

Sizes nearby

One size down: the 325 gallon underground cistern. One size up: the 600 gallon underground cistern.

Shipping, receiving and the first fill

The tank ships LTL at NMFC 156600-02, 97 by 48 by 42 inches, from the nearest of Norwesco's plants in Lancaster, Ohio, Owego, New York and Shawnee, Oklahoma; Norwesco gives the ship weight as 259 lb. The listed price is before freight; the freight cost estimator gives the lane cost to your ZIP. Two people can handle it off the truck. At the tailgate, check the part number against 44360 on the bill of lading and look the whole shell over for transit damage, because a crack found after backfill is a second excavation. Fill it with water and hold it before you backfill; our hydrostatic test method for new tank acceptance gives the fill, hold and leak check routine.

Questions before you order? Call 866-418-1777.