Thermostatic Rad Valves

Do you have a "cap" for the TRV? Probably not if you didn't fit it....

This will close the valve right down! I don't know if the Frost setting in summer will be sufficient.

I removed a rad (to send back to Screwfix) and left just the TRV on the closed position - it emptied the system down to no pressure and boiler didn't come on on coldest night of the year when I wasn't around = unchuffed wife!

Sorry I can't be more positive - but I can warn you against leaving the TRV unattanded for any period of time.

Here's the thread where I got pointed in the direction of the "cap" - says you might be ok if there's no "cold snap":

This site should help John: (watch out for wrap on the link)

When you buy the valves they come with a cap to turn them off, just remove the thermostatic head and use this cap. I guess you don’t have the required cap, so you could try at the plumber’s merchants and ask there if they have one. You will need the make of valve, as they are all different. Try posting the make on here perhaps some kind person will send you one. I would not try just turning it down, that sounds like a possible disaster in the offering, other wise drain the system down. Rob

Yes it should be but you can always put a temporary cap on the outlet pipe once the rad is off. About a quid from your local plumb centre.

Dave Baker - Puma Race Engines

I'd immediately take the TVR and have it as a second car then.

Vroom Vroom!