Septic Tank Float Switches for Pump Control

The float switch in a septic system is a level-sensing device that controls the effluent or dosing pump. It signals the pump to turn on when wastewater reaches the high-water mark and off once levels drop. In heavy-duty systems, stainless steel float balls with custom threads and magnets provide corrosion-resistant, long-lasting pump control compared to plastic alternatives.

Stainless steel — specifically 304ss or 316ss — is ideal for septic tank environments due to its resistance to corrosion, hydrogen sulfide exposure, and biological fouling. Unlike plastic floats, stainless steel float balls are pressure-tested, maintain structural integrity over time, and are available with custom fittings for secure installation in treatment tanks.

Round stainless steel float balls are available in sizes from 1-1/2" up to 14". Oblong floats range from 2x6" to 9x14" with various NPT and UNC thread options. Custom sizes beyond standard inventory can be manufactured to exact specifications. Contact the team directly to discuss sizing requirements for your specific pump control application.

Yes. Float balls can be manufactured with any thread specification including 1/4-20, 3/8 NPT, 1/2 NPT, and 3/4 NPT, among others. Through-tube options are also available to fit rods from 3/8" to 3/4". Custom magnet integration is offered for reed switch-based contactless pump activation. All configurations are available in matte, brushed, or polished finishes.

Yes. Stainless steel float balls in 304ss and 316ss are well-suited for wastewater treatment tanks, offering resistance to corrosive effluent, sludge, and chemical exposure. They provide accurate liquid level monitoring and reliable pump activation. The 316ss grade is particularly recommended for environments with higher chloride or chemical concentrations common in municipal wastewater systems.

Each float ball can be pressure-tested using dedicated equipment to meet custom system specifications. This process verifies the float's structural integrity under the specific pressure conditions of the target application — critical for pump control in pressurized septic or dosing systems. Pressure testing is available as a standard service and can be tailored to the buyer's documented requirements.