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Do you know the make of the TRV's. Look on the side of the valve it should have arrows for the flow direction and it might have bi-directional written on it. By turning off all the valves your going to have to start from scratch with the balancing, and the fault with the rads may not have...

Better to have TRV's fitted than keep turning the rads off altogether. You never know when the next big freeze will hit us. :shock: Good old british weather!

I agree with going for the Worcester, although I've had good reports on the Viessmann. As a registered installer - You will get the 5yr warranty with the Worcester, but that can be upgraded to 7yrs as an option. :)

Definitely sounds a very airy system you have got. Auto Air Vents are better than manual ones, but if you do have a problem with it pumping over into the F&E then they won't solve your problem, just disguise it. :wink:

Seems a bit odd to have the shower coming off the basin. I would either change the bath mixer tap for one with a shower hose or install a separate shower mixer valve and get rid of the electric shower. Electric showers don't give a lot of pressure and they are more expensive to run. The...

Boiler max thermostat setting probably not necessary unless we have really cold weather. Cylinder setting ok at 60 if your happy with output of hot water at tap. Otherwise turn up or down to meet your needs. As a guide pump setting is No 1 - 1 floor level No 2 - 2 floors No 3 - 3 floors...

It can be done without draining down the system but unless you are a plumber I suggest you drain down the system, rather than take the chance of a flood. :)

Does the pump sound like it gurgling? It may need bleeding.

Not necessarily. Do you have a sealed or open vent system?

What they are saying, and as I interpret it, the 120mm bend is for an unsupported made bend whereas it can be made smaller with the support of a former.

I'm sure that the mira needs at least 2bar pressure to work effectively, but don't quote me on that - I have not checked. Your mains pressure can be tested with a 'pressure gauge' - I usually screw it onto an outside tap or washing machine valve. :)

If your thinking of having a victorian style vertical rail out of the taps to a fixed head, then probably no, as the rail usually needs supporting. Unless it rises to the ceiling and is supported there!!. Difficult to visualize, perhaps get someone round to give suggestions and a quote.

Sounds like air in pump possible problem.

You can only do this if you have a combined foul and rainwater drainage system. Assuming the rainwater pipe is connected to the drainage system and not going to a soakaway. You will not find a connection for waste pipe to rainwater downpipe. It can be done (Conversion) but would need to be...

No the knarled ring only releases the TRV top - the valve is sealed.

Thanks Oph. Jumped the gun a bit, and rushed in, without brain in gear. Thinking about 'Junior'. :roll:

The long pipe run should have been upgraded to 2" but in reality it is not often done. The problem is you do have a blockage along the run somewhere, or the run has such a slow fall the discharge is running full bore. Or more commonly seen the long pipe run is not properly clipped which lets...

Check the fuse if you don't have the blue light :)

The answer may not be either of the thermostats but your pump, or at worse a resriction in the flow from your boiler around the hot water cylinder and back to your boiler. Check to see if when the boiler fires up that the pump is running. If the boiler cuts out fairly quickly and overheats...

the valve at the other end of the radiator to the TRV is the lockshield valve, which should not need adjusting unless you happen to be balancing your central heating system. The problem you are having with your Thermostic Radiator Valve (TRV) is either the head is not screwed on correctly, or...