new boiler,new location,old pipes

[noisypipes]

My old combi boiler has been removed from upstairs and a new Baxi condensing combi fitted downstairs in the garage.The plumber has capped off the old pipes (a hot and cold leading off in one direction and a hot and cold leading off in the opposite direction) and left them dangling (as they no longer have any support since they're not connected to the boiler). They are touching each other and the floor and can be moved and wobbled around easily.My question is what happens to the water in these pipes now as it has nowhere to go?Could this be the cause of the ticking/knocking noises I'm now experiencing and have been told is pipe expansion?I cant work out why the old pipes which have always been silent should be noisy now.If anyone has a diagram to explain what's going on I'd be delighted! Plumber says its not his problem as he just changed boiler and the pipes were existing system! Is this true?

 

[bellairaphon]

get him bk to bracket the pipe correctly. and if he capped them why didnt he take them back to where they tee'd off and capped them there

 

[gas4you]

Sounds like he has created some dead legs

If these are domestic H & C, you shouldn't have any dead legs due to legionella risks

 

[bengasman]

sounds like a proper cowboy job, it might be worth checking that this installation in actually safe.

 

[noisypipes]

Thanks for replies. This was a boiler replacement done under the Gov Warmfront Grant programme and so the installer was appointed by them. Although they've been very helpful (I've had approx 15 visits from various engineers and plumbers from the firm to try and sort out several problems!!) There seems to be some debate as to the limit of their repsonsibility - ie "the grant was only to replace the broken boiler so we've done everything we have to". Does anyone know how I can get the system checked for safety(they definitely have left deadlegs - they said so!) now or who I should talk to to try and get the continuing problems with the noise sorted out? The Warmfront inspector was quite clear that as far as he was concerned the company had done everything they had to do!!! Anyone have any experience of this or advice???

 

[gas4you]

Regardless of what the grant has covered, the fact that the appointed agent has not done the job properly is now their problem.

Removing the old pipe work and connecting the new boiler to it is part of the new installation, so it is their problem.

Stick to your guns and insist they correct ALL errors.

This is typical of the quality of work done by anyone contracted by the warmfront scheme

 

[noisypipes]

Thanks for your reply Dave. I must admit after 5 months, 15 visits and numerous phonecalls I'm beginning to give up!! Can anyone on the forum recommend a central heating specialist in York who I can ask to come in and look at the job and give me an independent assessment? After your advice I'd like to make sure the system is safe(I've got 2 small children). It would also be good to see if they could work out the cause of the noisy pipes.