Anti Siphon Valve

Designed for use on oil tanks for domestic oil fired central heating systems, this valve will prevent the flow of fuel when there is no positive vacuum applied to the downstream side. This prevents theft of fuel by cutting the pipe, and also prevents pollution if the pipe downstream of the valve ruptures Adjustable between 0 and 4 metres negative head, this equates to 0 to -400mb Brass Body, with Ntrile Diaphragm Only available in 3/8? BSP Max Flow TBC