T-H Marine Double Barb Inline Scupper Check Valve - 1-1/2" - Black - ILS-1500-DPT H Marine Double Barb Inline Scupper Check Valve 1 1 2" Black ILS 1500 DP Double Barb Inline Scupper Check Valve 1 1 2" Black A great solution to provide a scupper check valve in the drain line. Allows use of standard thru hull fittings in the cockpit and on the hull exterior. Features: Prevents Backwash Chemical Resistant Materials Thermo Plastic Flapper Product : T H MARINE DOUBLE BARB INLINE SCUPPER 1 1 2" BLACK Manufacturer : T H Marine Supplies