Plasson stop tap is designed to create a water isolation point along a pipeline. Made from dezincification resistant (DZR) brass, giving it exceptional resistance to corrosion, it has mechanical compression fittings suitable for metric connections. WRAS Approved Product - will be accepted by water companies as suitable for drinking water system. Suitable for above or below ground. Made (DZR) brass giving it exceptional resistance to corrosion,. Fast and simple to install. 0. 0. 0