Waterway Heavy Duty 3/4" FPT x 3/4" Barb Air Relief Valve (672-3150)

The Waterway Heavy Duty 3/4" FPT x 3/4" Barb Air Relief Valve (manufacturer part 672-3150) is a purpose-selected replacement or equipment component for compatible pool, spa or aquatic installations. Its specific construction and application help technicians and owners maintain the intended equipment arrangement instead of making an uncertain substitution based only on appearance. When planning a repair, identifying the exact installed assembly is as important as identifying the replacement part itself.

Safe removal of trapped air

Air-relief components help technicians manage trapped air in compatible filtration equipment during filling and service. Air pockets can affect circulation and pressure behavior, making the original relief arrangement important to preserve. The replacement must match both the physical connection and its intended location in the filter assembly.

Installation, Compatibility & Care

Switch off equipment and follow the filter manufacturer’s depressurization and startup procedure before handling any pressure-related part. Check threads, seals and operating mechanisms for deterioration; overtightening plastic fittings can damage the housing. Do not bypass a required relief component or substitute a generic fitting without approval.

A correct replacement also protects the time invested in diagnosing and servicing the surrounding equipment. The best results come from comparing the old part with its service diagram, planning required accessories before disassembly, and checking the restored system under normal operating conditions. Where the equipment is part of a pressurized, submerged or electrically powered installation, follow the manufacturer’s shutdown, isolation and recommissioning procedures; a physically fitting component is not automatically approved for every application.

Practical Features & Service Considerations

• Priming procedure: use the manufacturer’s air-release instructions.
• Thread compatibility: match the precise female or male mating connection.
• Seal condition: inspect specified O-rings and mating surfaces.
• Pressure safety: never service the part while the filter is pressurized.
• Installation fit: ensure clear access for operation and maintenance.
• Part distinction: separate valve-only and complete assembly listings.

Before ordering: Compare the original equipment label and service diagram with 672-3150. Verify any accessories or consumable hardware needed for the job; this product should not be mistaken for an entire system unless the listing expressly identifies a complete system.