HOZELOCK - Indoor Mixer Tap Connector : Fits Square, Round and Mixer Taps up to 43 mm High and 34 Mm Wide, Supplied with 2 Gaskets for a Better Seal [2274P9000] : Amazon.co.uk: Garden
Hozelock 1/2", 21mm Pro Metal Hose Connector : Amazon.co.uk: Garden
Hozelock 2293 Hose Y Connector : Amazon.co.uk: Garden
Hozelock Pro Metal Hose Joiner - 13mm (1/2") | Water Irrigation
HOZELOCK - Multi-Tap Connector 2-Way : Create 2 Circuits on a Single Tap, Independent Flow Valve per Outlet, can be used as a Y Connector [2256 0000] : Amazon.co.uk: Garden