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Glasgowgas You are turning it wrongly. You should be turning the radiator to adjust the temperature :D

The colour of the nut is irrelevant it is still the same nut

When was there no water at the bleed screw??????????????

Steady Read the post (Re air/water) and look at the photo before making snide comments and looking foolish :D

Undo the large chromed nut at the base of the white plastic head. This will allow removal of the heat and will expose the pin. Tap the pin gently with a small hammer to release it.

It seems that Chris may be having his dinner? I will answer in his absence. You do not need to drain the boiler to remove the actuator. All will become clear once you have removed it as per Chris' instructions. Steve

Hi The noise is most likely down to the pressure of your incoming mains. This can be sorted by the addition of a pressure reducing valve. Steve

The pressure in the sysytem should be around 1 bar when the system is cold. You will need to top up the pressure (See FAQ). The pressure will rise as the heating system warms up but you shouldn't expect it to rise to more than 2.5 bars.

Its the small white square nut next to where the key is inserted. If you open it (Anti clockwise) and water leaks from the key, it means that the key is not properly inserted and you will need to try again. To turn the water off, all you have to do is turn the small square valve in a clocwise...

The key needs to be inserted so that the thin side of the handle is facing the front of the boiler and it needs to be fully inserted. You then need to turn it 90 degrees (So that the fat part of the handle faces the front of the boiler) You can now open the water valve and watch the needle on...

4 - yes. Install arrester on incomming mains just after the stop cock. This will then protect the whole property.

Use a 500 x 500 and then use adjustable radiator tail extensions. I think that Screwfix sell them.[/url]

Just what I was going to say, I must learn to be quicker. Turn the pump speed up to II and see if it stops, if not max it.

Have you checked what speed the new pump is on?

Don't waste your time and money on a 34 year old system! Bite the bullet and install a new modern system. I would advise you to get 3 quotes before making any decisions. Good luck 8)

Yes, that will do the job.

Hi The easiest and cheapest option would be to fit a water hammer arrester. This is a small expansion vessel which is fitted just after your stop cock and available from a good plumbers merchants or online. Steve

Pics of defects