Reducing Straight Coupler 15mm x 3/8" from John Guest Speedfit
This Push-Fit Reducing Straight Connector 15mm to 3/8" is part of the John Guest Quick Connect Range – JG Part No. NC2511. It is ideal for converting from one tube size to another.

John Guest Reducing Stem Adapter 15mm Stem to 3/8 inch Tube
This Push Fit Stem Reducer 15mm to 3/8" is part of the John Guest Range of Drinking Water System components – JG Part No. NC2164. It allows for a 15mm Push Fit Socket or 15mm Compression fitting to be reduced to 3/8 inch tubing or connector.