Jandy 40mm 180 Degree Check Valve - Non Return Valve

A 40 mm 180-degree check valve, often called a non-return valve, is an essential in-line component used in pool and spa plumbing to stop water from flowing backwards. Built for straight-through operation, it keeps circulation moving in one direction while helping maintain system pressure. 

Key Features and Specifications:

• Fits 40 mm PVC pressure piping
• Straight-through, with inlet and outlet aligned on the same axis
• Sturdy CPVC material, typically UV-resistant for outdoor durability
• Swing-style flap supported by a stainless steel spring to ensure tight closure
• Clear cover allows debris checks without needing to dismantle the unit

• Stops water from flowing back toward the pump, particularly useful in elevated spa setups
• Helps maintain pump prime by preventing back-drainage
• Suitable for both pressure lines and return circuits, safeguarding overall system performance