The Anti-Siphon Valve – Adjustable is 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.

Tip: Consider the option of using the ‘TankTop‘ (see separate option), which is an all-in-one device incorporating an anti-siphon valve, filter, etc all in one complete unit (eliminating the risks of air leaks that can be introduced when connecting all of the individual components).  

• 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