Watts AquaLock™ 1/4" x 3/8" Lead-Free Brass Push to Connect x Compression Adapter Fitting

This 1/4" OD x 3/8" compression lead-free brass push-to-connect adapter incorporates stainless steel gripping teeth in the collets. These corrosion-resistant teeth allow the connectors to interconnect with multiple materials without the need for special tools or tube inserts. It works with polyethylene, PEX, and soft copper tube.