Isolators and radiator valves

[AndersonC]

Hi

Just getting ready to pipe up my radiators following complete hell with blown plaster! Anyway I've a couple of plumbing questions:-

1. Do all TRV's contain an isolator which can "isolate" the plumbing to the radiator thus enabling you to remove the radiator without having to drain the whole system CH system? If I want to employ these valves, what would I need to put on the lockshield side - is there such thing as an isolating lockshied?

2. Is it worthwhile including service/isolator valves within the pipework to enable the plumbing to be shut off in different areas/different radiators? I know this will prevent the system from working as the 'loop' will cease to exist, but I wondered if it would help make maintenance/subsequent home renovation easier.

Thanks for any advice guys

 

[simon_d]

most TRV's cant be turned to shut the water off completly

lockshields can be simply turned down to shut off water

i wouldnt really bother adding extra valves to the heating pipes

 

[bster]

i find most TRV rad valves provide what is called a 'positive off'position, this enables the TRV to be locked off completly. The 'decorators caps' that come with TRV's are called this as they simply prevent the heads getting accidently turned on and the sensors getting dirty.

older TRV's may open (even if they are 'off') as the temp in the room fluctuates though.

Try the Danfoss RAS-C valves (i think).

 

[AndersonC]

Thanks a lot for the advice guys I'll get some of those Danfoss on order.