To turn off the water supply to a hot tap, you typically locate and close the specific isolation valve for that tap.
Finding the Isolation Valve
Most modern plumbing systems include isolation valves for individual fixtures like taps (faucets). These valves allow you to shut off the water supply to a single tap without affecting the rest of your home's water.
- Location: Isolation valves are usually found on the pipework directly underneath or behind the tap, often close to where the pipes come out of the wall or floor.
- Identification: You should see isolation valves for each tap that will be marked red for the hot tap and blue for the cold tap. The red handle or marking indicates the valve controlling the hot water supply.
How to Operate the Valve
Once you've found the red-marked isolation valve for your hot tap:
- Action: Turning the valves clockwise will shut off the water supply to the taps so you can carry out the necessary work you need to.
- Method: Use your hand or a small spanner if it's a different type of valve.
- Confirmation: Turn the hot tap on after closing the valve. Any remaining water in the pipe will drain out, and the flow should stop completely if the valve is fully closed.
Types of Isolation Valves
While the reference specifically mentions valves you turn clockwise, you might encounter slightly different types:
- Quarter-Turn Valves: These have a lever handle. Turning the handle 90 degrees (a quarter turn) either in line with the pipe (open) or across the pipe (closed) controls the flow.
- Gate or Globe Valves: These typically have a round handle that requires multiple turns to open or close the valve. Clockwise to close, counter-clockwise to open. The reference implies this type by mentioning "turning... clockwise will shut off".
Always turn the red-marked valve clockwise until it stops firmly. Do not overtighten, but ensure it is snug enough to prevent water flow.
By following these steps, you can effectively isolate the hot water supply to a single tap for repairs, maintenance, or replacement.
