The Check valve spring loaded, type Pollustop is made from brass and is mostly used by professionals in for domestic and municipal projects as wel as for industrial applications
It is available with a POM internal valve mechanism. It is available in a wide rang of female BSP thread connections. It has a maximum remperature range of 100 degrees celsius and a working pressure of 10 bar.
Danfoss a Scandinavian A brand for brass heating industry components.