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its not unusual for a gate valve to fail to completely shut off. It will probably need replacing I'm afraid. Use a reputable make for the new one.

its not unusual for the valves to stick. You could drain the system or freeze the pipework either side of the pump. If you drain the ststem don't forget to add inhibitor when you refill

You all seem to be looking at this the wrong way - for competent professional people its good news - think of the one liner in your quotes advising punters that you are officially allowed to work on domestic installs and they will get a safe job plus a minor works certificate for the work...

The corgi man probably needs a way of isolating completely the hob for servicing reasons. Hard to say what you can do with your oven as you don't say what size the cables are or the current ratings of your oven/hob

You musn't put a junction box under the floorboards. Only crimped, soldered or similar mechanically sound joints can be made where they cannot be readily maintained.

sounds like you have a one pipe system amd you cut the one pipe or you have introduced and air lock sowe where?

what's the recalibration period for a bucket?

Many thanks Chris. I've got pressure gauges but this will give me an excuse to buy a flow meter! Thanks again.

I have to fit a mixer shower to a Megaflow sealed hot water system. Can anyone advise if there is anything I need to look out for or anything diferent from utilising a "normal" system? Many thanks.

has this just started or have you had any work done. It's probably just a pressrue sensor which needs replacing but for example if the mains stoptap is turned down that could be the cause

more info needed. Is it a new installation or a new problem?

I always recommend Scpetre from City Plumbing (and I alwas recommend surface mount unless easy access)

fitting a new kitchen and thought the mains pressure seemed high - measured it and its at 6bar. I thought the norm was around three - am I in the game of fitting a pressure reducing valve or is 6bar ok? Thanks for any replies.

Another mystery solved - thanks Bahco

I'm installing a new sink mixer on an unbalanced (mains cold and tank hot) system. Can anyone advise whether I use single or double check valves - in fact in what circumstances would you use single and doubles? Many thanks.

Thanksa again Ryan.

Ryan, i really appreciate your responses. Just to clarify: I'm not going to use spurs to the appliances, i'll extend the ring to unswitched sockets below the worksurfaces. Is it permissable to position these behind the appliances - they would be easy to access but not as easy as if they were in...

I may well be accused of old fashioned but I just cant trust them.... unless any leak would be immediately obvious. Not constructive but honest.

A "couple" of questions for the experts re my new kitchen wiring. I'm keen to get the wiring right as I'm going for the IEE Domestic Installer Scheme in the new year and want this to be one of the inspection installations. I do the 2381 training later this month but typically need to do the...

if the noise is coming from them then they are the wrong way round. Its easy to do. as i said check the flow arrow on ther valve body