This schedule specifies the requirements for the Wath Uni-Valve and Wath Under Pressure Tapping Tee as manufactured by Wath Group Ltd. These products will be considered a singular unit for this approval and will be referred to as the Uni-Valve System.
The Under Pressure Tapping Tee consists of a mechanical fitting comprising an axially split steel tube with a side branch tee on one part. The two parts of the split tube are joined by bolted linear flange joints.
The Wath Uni-Valve is fitted via a split teecollar. It is a retrofitted permanent gate valve for potable water distribution mains, installed without line stop. The valve product is constructed of white 5015 Acetal. The EPDM seal is engineered to withstand 16 bar water pressure while in operation and the O-ring seal is designed to seal against the inner wall of the T body. All materials in contact with potable water are WRAS certified.
Full details can be found in the Assessment Schedule.
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