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The John Guest 3/8″ to 5/16″ Stem Reducer is a push-fit adaptor used to reduce a compatible 3/8″ push-fit connection to 5/16″ OD pipe. It is commonly used in draught beer, beverage and gas dispense systems where two different connection sizes need to be joined.
The 3/8″ stem inserts directly into a compatible 3/8″ push-fit socket, leaving a 5/16″ push-fit connection for the smaller pipe.
This type of reducer is useful when adapting existing 3/8″ fittings or equipment connections to smaller 5/16″ OD beverage or gas pipe without replacing the original fitting.
Typical applications include:
The 3/8″ end is a stem, not a push-fit socket. It inserts into an existing compatible 3/8″ push-fit connection, while the 5/16″ side accepts 5/16″ OD pipe.
Always check pipe, pressure, temperature and fluid compatibility for the intended application.