Changing hot tap upstairs

RajaStyle

I don't seem to have a red gate cog next to the cylinder upstairs to isolated the hot water and change the hot water tap.

I have a grey flexi pipe though with 2 black flaps, if I turn one of the flaps down will it stop the cold water refilling the cylinder and allow the cylinder to naturally drain? Pic in link below ;



https://drive.google.com/file/d/1OyTBlXmBu_BK8sJM1h-LabpcBV0C-ny8/view?usp=drivesdk

I would rather not turn the cold mains off and drain the cylinder on demand just to change the hot tap in the bathroom. Thanks

[Deleted User]

Do you have an isolation valve in the hot water supply near the tap? Often there's a quarter-turn valve just before the flexible hose.

RajaStyle

Deleted_User wrote: »

Do you have an isolation valve in the hot water supply near the tap? Often there's a quarter-turn valve just before the flexible hose.

Thanks FYI it is unvented HW cylinder, so i have to turn the mains off and let the hot water run until the cylinder is empty ?

Do you have a link to a isolation valve i can't see anything on the pipes they just run constant without anything on them that I can see that would isolate the HW.

RajaStyle

https://www.toolstation.com/isolating-valve-cp/p36879

nothing like that i can see

[Deleted User]

That's the right thing to look for, do you have a picture of the pipes at the tap end? It would seem strange to me to drain the whole HW system just for a tap.

southcoastrgi

That is a filling loop for your heating system nothing to do with your hot water, there should be a valve somewhere south of that valve at the back (which btw isn't fitted correctly), failing that turn off the cold main water & open a hot tap the water will stop after a short while & it won't drain your cylinder