Pump Float Switches

Stainless steel pump floats typically last 10-20 years depending on material grade (304ss vs 316ss), liquid chemistry, and operating pressure. Unlike plastic floats that crack or degrade from UV and chemical exposure, stainless steel construction resists corrosion and mechanical wear, making it a longer-lasting choice for continuous industrial duty cycles.

Float switches connect via threaded fittings, through-tubes, or magnetic coupling attached to the pump's control circuit or rod assembly. Common thread specs include 1/4-20, 3/8 NPT, and 1/2 NPT. The float's wiring or mechanical linkage signals the pump controller to activate or deactivate based on the float's position in the liquid.

Manually raise and lower the float to confirm it triggers the pump at the correct liquid levels, then check for smooth movement without obstruction. For magnetic floats, verify the magnet engages the reed switch consistently. Pressure-tested floats should also be checked for leaks or buoyancy loss before installation into critical systems.

Our pump float switches are constructed from 304 or 316 stainless steel, offering superior durability and corrosion resistance compared to plastic alternatives. 316ss is recommended for corrosive or chemically aggressive environments, while 304ss suits general industrial and food processing applications. Finishes include matte, brushed, and fully polished options.

Yes, float switches can be customized with specific thread sizes, through-tube diameters, magnet placement, and shapes (round or oblong) to match your tank or pump assembly exactly. Custom pressure testing is also available to ensure the float performs reliably under your system's specific operating conditions and liquid density.

Round float sizes range from 1-1/2" to 14" in diameter, while oblong floats span from 2x6" to 9x14", each available with matching thread or through-tube options. The correct size depends on your sump chamber dimensions and required buoyancy force; a technical consultation can help match the float to your pump's activation needs.