3/8 BSA to 3/8 US or 1/4 US 

No water to shut off and turn on with this self-closing and opening valve in head system, with built in filter flush valve.

With a built-in pressure release flush valve and multi swing adapter fittings availability, you have it all in the new filter head from BWT  

The BWT Flex filter head makes life so easy.  Just set the filtration # you need, based on your water hardness and the BWT filter chart recommendation per filter model, 1, 2 or 3 to get the proper protection and the longest life from your BWT filter.

With this all-in-one valve in head system. When it’s time to put in a new filter, just twist out the old one and turn in the new one NOTE: All equipment, including but not limited to espresso machines, water softeners, filters, and hoses have the potential for leaking when directly plumbed to a water source (well water, rusty water, etc.).

Please properly install water leakage equipment to shut off the water supply if any leakage occurs. Leakage can occur from lack of proper maintenance and/or too high-water line pressure.