Chem-Tainer 1.5 Inch Water Tank Float Valve (VALVE ONLY)

The Chemtainer 1.5 Inch Water Tank Float Valve is the fill-control mechanism only — a PVC-bodied float valve with a 1.5-inch connection, not a tank. It automatically shuts off incoming water when the level in your storage tank reaches the float's set point, protecting against overflow on gravity-fed and pump-fed fill lines. If you are specifying a float valve or shut-off hardware for a water tank fill assembly, this is the standalone valve component — the part people search for as a Chemtainer water float valve.

Will it work for your fill line?

The valve body is PVC with a 1.5-inch inlet connection and an empty weight of about 2 lb. Overall it measures roughly 9 inches long by 2 inches wide by 3 inches tall (1.5-inch diameter body), so it fits inside standard bulkhead and tank-top plumbing without a large footprint. The one decision that matters is match: the 1.5-inch valve pairs to a 1.5-inch tank inlet or adapter. Before you order, confirm your tank's fill fitting is 1.5 inch — a size mismatch is the most common reason a float valve arrives and won't fit up. Because this is the valve only, plan your riser, elbow, and any bulkhead fitting separately; you supply the adapter and gasket to suit your tank's inlet.

Sizing the tank behind the valve

The float valve controls fill; it doesn't set your storage volume. If you are still sizing the tank the valve will sit on, run the numbers with our Tank Sizing Calculator and the Tank Sizing Guide so your reservoir capacity matches your draw and refill rate. Automatic top-off only earns its keep when the tank behind it is sized right.

The mistake to avoid

This listing is the valve only — no tank, no riser assembly. Buyers occasionally expect a complete fill kit; you are getting the PVC float valve itself. Verify the 1.5-inch connection against your tank inlet before you order, and remember PVC float valves are built for water service, not aggressive chemical duty. See the technical drawing on this page for the valve dimensions before you finalize your plumbing layout.

This is a small, lightweight part that ships by parcel rather than freight, stocked in multiple regional locations so it goes out from the nearest one to you. If you want us to confirm the 1.5-inch fitment against your tank before it ships, call 866-418-1777, or use the Freight Cost Estimator if this valve is going out alongside a tank on the same order.