M x F Butterfly Handle Gas Ballvalve with Test Point extension - M12 Conical Bush &

- M12 Conical Bush & Stopper with Nut & Washer

but the vacuum prevents heat escaping from the tank

The valve is only opened when there is a flow of water

Thermostatic Mixing Valves (TMVs) blend hot and cold water

- Hand tighten

M x F Butterfly Handle Gas Ballvalve with Test Point extension - M12 Conical Bush &DESCRIPTION: Natural Gas and LPG Systems Ballvalves are operated by turning the insulated handle a quarter of a turn depending weather you wish to open or close the valve. They are very quick and easy to use and also have the advantage of not offering much resistance to the flow of gas. They come with two types of connections either male BSP thread on both sides which range in size from 3 8" through to 2" or with compression fitting either side which