can`t isolate water supply to shower

[kimbo3213]

Hello
I need to change the thermostatic cartridge on my shower but i`m unable to isolate the inlet water supply`s to the shower.
I can reach 1 of the valves (the red one on the black tank that`s above the cylinder) but the other one is in such a position that it`s impossible to reach/grip to turn it off, It`s behind the blue cylinder.

Can I get round this buy turning the water off at the mains, then run the hot and cold bath taps to empty the system to change the thermostatic cartridge on the shower ?
We live in a flat so all`s on one level
The boiler is Worcester Greenstar 24 ri
Greenstar 24Ri - Worcester, Bosch Group UK homeowner site
which is situated in the kitchen.
Thanks for any advice
Kim

 

[SimonJohns]

Yes. Just turn mains off and run the water off through taps

 

[PlumbBobBob]

is there a gate valve to turn the cold water feed off to the hot cylinder?

 

[Barry98]

leave the taps open when your doing it and , when you first turn back on take you shower head of just incase theres anything in the pipes, it can then run through the hose and not bloack the head

 

[kimbo3213]

is there a gate valve to turn the cold water feed off to the hot cylinder?

i don`t know i`m afraid . Had a look round it and can`t see one

 

[rocketmanbkk]

where do you live Kimbo? If in my area. I'll help you do it.

 

[kimbo3213]

just had another look and the only thing i can see is this tap at the behind the tank and the pipe goes to the top of the cylinder. But i cant shift it anyway.

thanks rocket i`m in Hertfordshire

 

[kimbo3213]

Thanks for all your help. part arrived today and fitted in half hour no problems