WHALE Single Tap Unit - White. Lightweight?and robust - high quality materials. Suitable for use with pressure switch or microswitch systems. Ideal for tight spaces. Robust ABS construction. Designed for use with all types of manual and electric pump supply systems. Connects to Whale Quick Connect 12 mm pipework or 1/2"" hose connections . Designed, refined and made in our UK facility since the early 1980s.?"