John Guest Straight Adapter Check Valve: 3/8" Tube x 1/8" NPTF Male Connector
The Stainless Steel Check Valve Insert is assembled directly into the John Guest Male Pipe Adapter, 3/8" Tube x 1/8" NPT. Unlike a ball-type check valve, ours is constructed of stainless steel components with a unique umbrella-style sealing disc. Each valve is individually tested for positive seal.
Straight Adapter is John Guest PI011221S Tube 3/8" x 1/8 NPTF. Engraving reads: SK266-001 PNSF-51