Pipe ending cap - Application: for installation in water mains and central heating systems; - Size: 3/8", 1/2" and 3/4"; - Thread type: Male; - Maximum working temperature: 95 deg C; - Maximum working pressure: 1.0 MPa. Pipe ending cap Application: for installation in water mains and central heating systems; Size: 3/8" male; Maximum working temperature: 95 deg C; Maximum working pressure: 1.0 MPa.