McAlpine CONVALVE vert/hor inline non return valve 19/23mm

In-Line Vertical Non-Return Valve with inlet and outlet connection for 19/23mm pipe, 19/23mm Inlet and Outlet, Prevents waste water from sanitary pipework entering a condensing boiler, Receives the discharge from a condensing boiler, Conforms to BS 6798:2009 and Building Regulations Approved Document H