25mm Rubber expansion bung.
Used to block pipes when removing controllers or pumps, if shut-off valves do not close 100%.
Place rubber bung in pipe and twist wingnut to tighten.
HEATPUMPS 10% to 30% OFF PLUS FREE SHIPPING FOR MOST MODELS
IF YOU ARE LOOKING FOR A FULL SYSTEM ASK US FOR A PACKAGE DEAL-ALSO SEE IF WE INSTALL IN YOUR AREA