Val Pak 1 1 2" MPT Spring Return Line Check Valve [Lt Gray] [Spa] (V20 342) fuses Supports a more complete wet end Supports a more complete wet end restoration Filter cartridges are designed to capture fine debris while supporting strong circulation and clean water The Val Pak 1 1 2 inch MPT spring return line check valve in light gray is designed for compatible spa applications where the return line needs dependable one way flow control The light gray finish makes this a smart option for installations where the replacement should not only fit correctly but also look more at home with the surrounding plumbing and spa hardware