Caleffi Presscon™ press fittings make installation and maintenance of our products fast, easy and efficient. The 3/4" fitting uses a standard 1" union nut which fits the 521 Series MixCal™ thermostatic mixing valves, Z-one™ zone valves, 6763 Series Thermo-electric zone valves, 5350 AutoFill™, NA5453 DIRTMAG® dirt separator and many other products that use that same 1" union nut.
The best way to explain how they work is watching the video below; Bob "Hot Rod" Rohr will show you how it's done!
