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Non Return Valves & Ratwall

Non return valves to suit 110mm & 160mm pipe sizes are highly efficient and allow grey water & rainwater to flow in the correct direction toward the final destination and it doesn’t allow the discharged water to flow back up your underground drainage system. An inline valve can be installed as part of the initial underground drainage installation or as a retro fit product should back flow problems occur. Supplied with a single flap for rainwater and grey waste whereas.The underground drainage fittings have lockable, accessible access lids and flaps can be locked into the closed position to prevent flow in either direction. Ratwall is a highly effective drainage pipe rodent stopper, the unit simply inserts into a manhole chamber outlet and the curved stainless steel flap allows all water and matter to pass through but will block any rodents from entering a property in an upstream direction.      

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