The Flomatic 5359 3/8" 297D plastic check valve is a compact, corrosion-resistant check valve designed to help maintain line pressure, prevent backflow, and protect downstream components. This model features an acetal body with a threaded female NPT x female NPT connection, a Nylon 11 poppet, a Viton seal, and a stainless-steel spring. The valve is rated for a maximum working pressure of 150 psi and a maximum temperature of 180°F (82°C).

Specifications:

Max Pressure: 150 psi (10 bar)

Max Temperature: 180°F (82°C)

Body: Acetal thermoplastic

Poppet: Nylon 11

Seal: Viton O-ring

Spring: Stainless steel

Connection: 3/8" FNPT x FNPT

Weight: 0.04 lbs

Operation: Flomatic 297D plastic check valves are designed to provide years of trouble-free operation when properly sized and installed in suitable water and plumbing systems. The internal spring-loaded poppet closes quickly at low reverse flow to help minimize backflow, water hammer, and pressure loss, supporting stable system performance.

Construction: The all-thermoplastic body and internal components, combined with stainless-steel spring construction, provide excellent resistance to corrosion and chemical attack in many water handling applications. The straight-through flow path helps keep head loss low while maintaining reliable check action.

Applications: Residential and light commercial plumbing systems, water pressure maintenance, general utility water lines, and applications requiring a compact, non-metallic check valve.

Manufacturer part number: 5359 Model 297D plastic check valve with 3/8" FNPT x FNPT connection.