Advanced Geyser Valves are building the Worlds first plastic PCV pressure control and pressure relief valve combined in a innovative non freeze unit. Entirely designed and manufactured in South Africa. Injection molded in Food and Drug Administration approved metal replacement glass reinforced plastic. 22mm compression dezincification resistant (DZR) Brass fittings. Ice expansion relief, Patent is pending. Advanced Geyser Valves also make the Advanced TeePee Temperature Safety Valve. This quality valve is also designed and entirely manufactured in South Africa. The body is forged in DZR Brass. And is made in 400 kPa and 600 kPa options. Available with Male or female inlet mouning. Outlet 22mm compression DZR Brass fittings. All products are South African Bureau of Standards (SABS) approved