The John Guest 1/4 in. Push-to-Connect Check Valve (10-Pack) valves are manufactured from white polypropylene and equipped with EPDM O-rings utilizing John Guest's push-fit technology to make easy， reliable， leak-free connections. They have been developed to satisfy the compatibility needs for a wide range of applications and can be used on plastic or soft copper tubing. To make a connection， the tube is simply pushed in by hand， the unique John Guest collet locking system holds the tubing firmly in place. Disconnection is just as easy and requires no special tools.

John Guest push-to-connect technology provides a simple， reliable， leak-free connection

Manufactured from white polypropylene and equipped with EPDM O-rings

Can be used with plastic or soft copper tubing

Lead-free， corrosion free， non-toxic， and more chemically resistant than other plastics

Manufactured with FDA compliant materials and NSF 61 and 51 certified

Rated to 150 psi at 70°F and 60 psi at 140°F

Possible applications include: reverse osmosis systems， ice makers， home/office coffee and beverage dispensing equipment， hydroponics and aquarium/aquatics