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I want to remove one of my central heating radiators to decorate. The themostatic valve is on the left as you look at the radiator, and the nut on this valve nearest the radiator unscrews by turning it clockwise as you look side on to the radiator. How about the nut nearest the radiator on the...

thanks gasguru. I'll leave this one to a plumber. I have BG coming on Monday to quote on a condensing boiler. I may need one as my hot water cylinder is now leaking. I'll see what they say. If its under 2 grand I'll probably go for that. Will I still need my new Grundfoss Alpha pro pump, or do I...

I have a similar problem with a gravity feed shower. I had the central heating boiler temparature up quite high by mistake, and the shower pulsated a bit with the hot water. There was plenty of cold water as well. I also have some leakage from the hot water storage cylinder. Could this have been...

Just had another look at the flanges 130mm apart. I see the metal pipe above the top one and below the bottom one has a screw with the screwdriver slot in the vertical position. Would these be the isolating valves by any chance? Needless to say they won't turn (at the moment) with a screwdriver.

thanks gasguru. I agree that it doesn't make sense to replace a working pump with a high efficiency one. However, its probably 50-50 when replacing a faulty one. Yes, slight risk that the new technology is unproven long term. As mine looks like it is on the way out, I needed to order...

you could be right gasguru. http://mail.mtprog.com/CD_Layout/Day_2_22.06.06/0900-1045/ID128_Davies_final.pdf#search=%22central%20heating%20pump%20wattage%22 This link gives the average annual pump usage as 124kwh, and the saving from this type of pump at 62%. As I have probably an above...

http://www.ukhomeideas.co.uk/ideas/heating-fireplaces/central-heating-pumps/the-new-alpha-pro-pump-can-cut-your-energy-bills This link puts the cost of running the pump in an average house at £57 per annum, and reckons that reduces to £12 with the Alpha pro. Anyway, I need a new pump, so...

thanks ChrisR. At least I know what a flange is now! Yes, two big nuts 130mm apart. It looks like you just unscrew these, put in the new pump, and screw them up again. I don't seem to have any isolation valves so a system draining is called for. I did that a few times when installing my...

I have a 28 year old two-speed grundfos super 4 pump which has recently started making a noise and becoming hot. The central heating has been off over most of the summer. I had the boiler thermostat turned right down as this still heated the hot water satisfactorily(convection). I have now...