The 1½" BSPT flanged valve offers both pressure relief and anti siphon protection for above ground fuel storage tanks. Suitable for pressures up to 3.4 bar and flows up to 200 litre/min, the valve prevents accidental loss of fuel from damaged or leaking pipework. Must be fitted horizontally near the dispenser (see instructions). Anti-Syphon Valve Features: Suitable with petrol, kerosene, diesel/biodiesel up to B30.This valve is ATEX certified & can be used with petrol.High flow rate, copes with up to 200L/min.Protects above ground tanks from syphoning.Information:Includes Inlet strainer.Max tank height from ground level 6m.