The DHD7340 is a large hexagonal head Inward Pressure Relief Valves with a double thread. One side is tapered and the other parallel meaning it can be installed in-line or connected to an exhaust or intake . The unit can be easy installed with a socket or spanner.

Valves can also be mounted in reverse positions to act as Outward Relief Valves.

These valves are commonly used along with our range of Tank Vent Dryers to give added protection in case of blockages. The BSP thread mean they can be easy mounted into standard pipe fittings.
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