A foot valve is specifically designed for the bottom of a vertical suction line. It includes a built-in strainer to prevent debris from entering the pump and a spring-loaded mechanism optimized for vertical mounting and prime retention. A standard inline check valve lacks these features.

If the seat leaks, the water column slowly drains back. This causes the pump to lose prime. If the disc jams open, water rushes backward, potentially spinning the pump backwards and causing catastrophic damage. This is why a high-quality, zero-leakage seal is critical.

Maximum suction lift for standard centrifugal pumps is around 20-25 feet at sea level. However, for vertical turbine pumps, foot valves are installed at depths exceeding 200 feet. The pressure rating of the valve must match the static head. Always consult our engineers for deep well applications.

For seawater (saltwater) applications, we strongly recommend our CF8M (316 Stainless Steel) Foot Valve with an EPDM seat. This combination offers superior resistance to chloride corrosion and galvanic degradation.

A well-designed foot valve causes minimal friction loss (usually less than 0.5 psi). However, a clogged strainer or an undersized valve will restrict flow. We always recommend sizing the foot valve to match the pipe diameter, never smaller.

Our foot valves feature an easily removable strainer cage. Simply unscrew the cap, slide out the stainless steel basket, clean it with a wire brush or pressure washer, and reassemble. We recommend inspecting the strainer every 3 months to maintain peak performance.

Yes. We provide free samples to qualified engineers and procurement teams for field testing. You just pay the shipping cost. If you place a bulk order within 90 days, we deduct the sample cost from the invoice. Request your free sample here.