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got a strange problem with a potterton promax combi 28he plus boiler. even on hot water only, when running the hot water there is a banging noise from the boiler, and a corresponding needle movement on the pressure gauge. love to know what this is- can anyone point me in the right direction? cheers.

am getting a bit of kettling on my boiler and have been told to get it flushed. do either of these products work sufficiently well?

got a 3 port valve causing me problems. the valve itself is 4 months old and so is actuator head. worked til a couple of weeks ago, then decided to play up. when hot water only is selected rads heat up as well. on removing head it actuates fine, and valve is nice and moveable. it's a danfoss hs3...

am fitting a suspended plasterboard ceiling for a customer and would like to know if they should need fire hoods for their new downlighters? original ceiling is plasterboard and staying, nothing above but a flat roof. would like to advise them correctly (and know for myself for the future).

can anyone suggest a decent suspended ceiling that can take the weight of plasterboard? have a customer who doesn't want tiles, just a flat ceiling and downlighters. at the moment it's a high flat roof on a kitchen so has crappy angle lights on a rail.

what size of notch to use when spreading the adhesive? obviously don't want adhesive squeezing through grout lines. and is there a secret to getting them to stick flat? ie. use a piece of board to press down? difficult questions for a mosaic novice and I want it to look right, thanks for any help.

can anyone tell me what is in boiler condensate? and how it is supposed to escape from the building? mother-in-law just had an intergas 36/30 fitted, and the condensate is going into a bucket. does it have to go into a drain or can it spill onto the drive?

what causes a shower pump to remain running even after she shower is turned off?there is no leak from the pipework and the pump only feeds the shower. is it an internal fault in the pump? still under warantee...

not come across one of these before, and the customer isn't sure how to shut off his water in the street. how does it shut? any special tools? need help with this one. cheers.

I regularly service an old people's home to fix the scaled-up and sticking tmv's. But one or two rooms take their time in getting a supply of hot water. the problem is the system is gravity with multiple cylinders for the unit and thers rooms are on the end of a run. the staff tell me the tmv is...

changed taps on an old customer's bath, and noticed she has an initial "surge" of hot water which then dies down to normal. this happens at each hot tap if the water is left to build up pressure. what is causing this? she has a combi boiler that is due to be serviced soon and I would like to...

the feed/expansion tank for my immersion cylinder keeps overflowing. I have isolated the cold water supply but have noticed the 22mm pipe feeding the cylinder is warm at the base of the tank. Also noticed "swirling" patterns coming from said pipe back into the tank. As the heating system is a...

baxi duotec 28HE problem I'd like some help with please- it boils and shuts down. initially gave an E125 fault, primary heating circuit. so turned heating off, and tried again. this time gave an E110 fault,hot water overheating. manual says test overheat thermostat and that's ok, would just like...

I am in the process of doing a quote for a contractor, and the specs he's been given to complete have several test certificates thet need doing at the end of the job. as I'm just a lowly wet plumber, I was wondering if anyone could tell me what they're relevant to, and who has to complete them...

A mate of mine has a problem with his central heating. The boiler loses pressure after a couple of days and stops working. But the expansion vessel on the other end of the system still reads sufficient pressure. How so? Don't know the make of the boiler, and he's nagging me to take a look...