PVC One-way Spring Piston Flap Check Valve Pipe Fittings Ø 32 40 50 63 75 90mm

Spring Type valves are best for pressurized water lines where a defined cracking pressure is needed to prevent backflow. Piston Type valves offer smooth, low-resistance flow control and work well in both pressurized and moderate-flow systems. Flap Type valves are ideal for gravity-fed drainage or low-pressure applications where a simple hinged flap is sufficient to block reverse flow. Match the style to your system's operating pressure and flow characteristics.

Measure the outer diameter (OD) of your existing pipe in millimeters. The valve size listed (e.g., 32 mm, 50 mm) corresponds to the nominal pipe diameter for standard PVC socket-fit connections. If you are unsure, consult your pipe's specification sheet or measure the OD and compare to standard PVC pipe sizing charts. When in doubt, contact us to confirm compatibility before ordering.

PVC is inherently resistant to moisture and corrosion, making these valves suitable for outdoor installations. For underground use, ensure the valve is protected from direct UV exposure (PVC can become brittle with prolonged UV exposure) and that the burial depth meets local code requirements. For continuous outdoor above-ground use, consider UV-protective wrapping or housing.

PVC offers good resistance to many common household chemicals, mild acids, and water-soluble fertilizers used in garden irrigation. However, it is not recommended for use with strong solvents, concentrated acids, or aromatic hydrocarbons. Always verify chemical compatibility with PVC before use in specialized fluid systems.

Maximum working pressure varies by size and style. PVC check valves in this size range typically handle pressures in the range of 4–10 bar (58–145 psi) depending on the specific variant, but we recommend confirming the rated pressure for your selected size and style. Please contact us to confirm the exact pressure rating for your chosen variant before installation in high-pressure systems.

These valves use a standard PVC socket (slip-fit) connection. For a permanent installation, use PVC solvent cement (primer + cement) following standard PVC pipe joining procedures. For temporary or test installations, a friction fit may hold in low-pressure scenarios, but solvent welding is strongly recommended for any pressurized or permanent application. No specialized tools beyond standard pipe cutters and applicator brushes are required.

Larger diameter valves (75 mm and 90 mm) are typically used as single units in main line applications, so they are offered in 1-piece packs. Smaller sizes (25 mm, 32 mm, 40 mm, 50 mm, 63 mm) are commonly used in multi-zone or multi-outlet systems, so multi-pack options (up to 5 pieces) are available to reduce per-unit cost and simplify ordering for larger projects.