central heating TVR valve


Postby greengrass » Mon Nov 05, 2007 10:18 pm

On the TVR thermostat radiator valves is it possible to just replace the top half to save draiing the system to replace the whole issue. The reason is I am not sure the top half is working properly in sensing cold air and activating the valve. And to remove the top half I assume this is acheived by undoing the nut directly under the top section of the TVR valve [the white bit with temp level numbers]. Can any TVR thermostat head be used or must I use like for like? OR, which will be a bugger, have to drain down and replace the whole valve.
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Postby marrtin » Tue Nov 06, 2007 9:27 pm

Well, I guess it depends on what is wrong with the valves. Certainly you remove the head as you suggested, and a trip to various plumbers merchants should find a replacement. Each manufacturer is different.

When you remove the head, a centre pin is visible. This pin often sticks and jams the valve in one position. Often it can be released by tapping gently.
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Postby htg engineer » Tue Nov 06, 2007 9:30 pm

You should be able to get replacement thermostatic heads, they have to be the same make and model.

TVR is a make of car - TRV = Thermostatic Radiator Valves
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Postby greengrass » Wed Nov 07, 2007 10:16 pm

[quote="greengrass"]On the TVR thermostat radiator valves is it possible to just replace the top half to save draiing the system to replace the whole issue. The reason is I am not sure the top half is working properly in sensing cold air and activating the valve. And to remove the top half I assume this is acheived by undoing the nut directly under the top section of the TVR valve [the white bit with temp level numbers]. Can any TVR thermostat head be used or must I use like for like? OR, which will be a bugger, have to drain down and replace the whole valve.
Greengrass[/quote]


Thanks to both for your repllies

I spotted the mistake as I hit the button had a look at the cars and put one on my 'Wish list'.

[size=18][b]Another question which my daughter has just asked me.[/b][/size]

Her rads have the standard manual valves one rad is quite hot. I've heard about 'Balancing' rads. How can the temp be reduced? Would closing the valve [in stages ] the opposite end to the control valve help reduce temp.
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