SHURFLO Pressure Switch Replacement Kit 94-375-05 for 8000-Series Pumps — 40–60 PSI, Direct-Fit Repair

This replacement kit provides the specific pressure switch and mounting parts needed to fix or service SHURFLO 8000-series diaphragm pumps that have lost automatic pressure control. Engineered as a direct fit for the original 8000 pump family, the kit targets the valve that senses system pressure and triggers the pump motor to start and stop, returning your pump to consistent performance without replacing the entire assembly.

Which SHURFLO pumps will this replacement kit fit?

The 94-375-05 kit is intended for SHURFLO 8000-series models. It was produced to match the factory pressure range and physical connections so installation is straightforward for compatible units.

• Direct compatibility: 8000-443-136 (solar water pump)
• Also fits: 8000-543-136, 8000-541-236, 8000-543-236, 8000-543-936
• Additional supported models: 8006-543-236, 8007-543-236, 8009-541-236, 8009-543-236, 8009-543-936, 8020-513-236

How does the 40–60 PSI switch affect pump performance?

This switch controls when the pump starts and stops based on system pressure. A correctly functioning 40–60 PSI switch prevents rapid cycling, maintains steady water delivery, and protects the motor from short-run wear.

• Start/stop thresholds set between 40 and 60 PSI for consistent output
• Reduces cycling to extend pump motor life
• Helps maintain steady flow under variable faucet or sprinkler loads

What should I expect for installation and compatibility checks?

Installation is typically a matter of removing the old switch assembly and fitting the new kit into the original mounting points. Verify model numbers and visual match before installing, and follow safety steps such as isolating power and draining pressure before service.

• Confirm your pump model is listed among supported numbers
• Power down and relieve pressure before replacing the switch
• Use original mounting hardware and observe wiring orientation for safe operation

What signs indicate my pump needs this replacement switch?

Common symptoms include failure to shut off, excessive on/off cycling, or the pump not starting even when demand exists. These behaviors point to a worn or failed pressure-sensing switch rather than the pump motor itself.

• Pump runs continuously despite closed fixtures
• Pump cycles rapidly with minimal water use
• Pump won’t start under normal demand but runs after manual intervention

Who is this for: This SHURFLO 94-375-05 Pressure Switch Replacement Kit is aimed at boat owners, RVers, solar-water installers, service technicians, and maintenance-minded homeowners who operate SHURFLO 8000-series diaphragm pumps. If you need a direct-fit replacement to restore automatic pressure control and avoid replacing the whole pump, this kit offers the pressure set and physical compatibility used in original SHURFLO assemblies. It’s best suited for users comfortable with basic electrical safety and plumbing isolation steps when performing the swap.