Basement Non Return Anti Flood Valve 160mm With Stainless Steel Flap Dek-drain-non-return-valves-product-data Dek-Drain non-return valves are in-line barriers which are manually operated when the risk of flooding
exists. They should be located in a chamber for access and maintenance is easily achieved with the
removal of the top casing exposing the inner workings to clear debris and ensure the mechanisms are
still free flowing.
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