SHURFLO Pump Switch Assembly 94-800-05 – Replacement for 4008/4028 Pumps, Single OEM-Fit

The SHURFLO PENTAIR 94-800-05 pump switch assembly is a direct replacement switch designed to restore automatic pressure control on compatible SHURFLO 4008 and 4028 series pumps.

This replacement part is manufactured by SHURFLO (PENTAIR) and supplied as a single unit (manufacturer part number 94-800-05). It’s engineered to match the original switch specifications for selected SHURFLO pumps, providing a convenient swap when the existing pressure switch wears out or fails. The switch comes packaged compactly and is assembled in Mexico, with dimensions and weight that make it easy to store or ship.

Which pump models is this switch compatible with?

The 94-800-05 switch is built to fit specific SHURFLO pump models, ensuring correct electrical and mechanical connections. Before ordering, compare the part number and mounting points to your existing switch to confirm fit.

• Designed for SHURFLO 4008-101-E65 and 4008-131-E65
• Fits SHURFLO 4008-171-E65
• Compatible with SHURFLO 4028-100-E54
• OEM part number: 94-800-05 for exact match

How do I install this replacement switch on my pump?

Installation typically involves removing the old switch, transferring any wiring, and mounting the new unit in the same location. If you’re not comfortable with electrical or plumbing tasks, have a qualified technician perform installation to ensure safety and proper operation.

• Switch mounts to the pump where the original unit was located
• Transfer wiring or connectors following the pump’s wiring diagram
• Verify seal and mounting screws are snug to prevent leaks and vibration
• Test the pump system briefly after installation for correct on/off cycling

What are the package and origin details I should know?

This single-unit switch ships in a compact package and is manufactured in Mexico. Package sizing and weight are useful when planning shipment, storage, or returns.

• Package dimensions: 7" L x 5" H x 2" W
• Package weight: approximately 1 pound
• Country of origin: Mexico
• Supplied as one switch assembly per package

What performance or safety steps should I consider after replacing the switch?

After fitting the new switch, run the pump briefly and observe cycling behavior to confirm the switch is operating as expected. Ensure all electrical connections are secure, and inspect for any leaks or unusual noises during the initial run.

• Confirm pump starts and stops at expected pressures
• Check wiring insulation and tightness to avoid shorts
• Listen for abnormal vibration or humming that may indicate misalignment
• Keep the pump area dry and free of debris for long-term reliability

Who is this for: This SHURFLO 94-800-05 replacement switch is aimed at technicians, boat owners, RV enthusiasts, and maintenance personnel who already use compatible SHURFLO pumps and need a direct, OEM-level replacement switch. It’s a practical choice for anyone seeking a simple swap to restore automatic pressure control without changing pump hardware or plumbing. If your pump model matches one of the listed 4008 or 4028 variants and the current switch is faulty, this assembly offers a straightforward repair path.