Brass swing-check non-return valves are use to prevent back-flow, back siphoning and cross contamination of water supplies. The high quality materials and modern sealing systems yields a long service life. They have female BSP threaded connection either end.

NB. There are legal requirements regulating water installations in domestic, commercial and heath care premises. These requirements make it a criminal offense for any person, whether owner or occupier, to allow the wholesome (potable) water supply within their premises to become contaminated, wasted, misused or unduly consumed.