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Wood Magnet
Senior Member
Joined: 07 Feb 2006
Posts: 3550
Location: sunderland
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 Posted: Fri Nov 16, 2007 2:15 am Post subject: |
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Has your builder got spurs on his boots by chance? 
Never seen anything so ridiculous looking, tell him to change it. 
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People forget how fast you did a job - but they remember how well you did it.
I no longer skinny dip, i chunky dunk these day's. |
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Any_help_welcome
Junior Member
Joined: 14 Nov 2007
Posts: 6
Location: North West London
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| Posted: Fri Nov 16, 2007 11:02 am Post subject: |
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I think he has. This is just one of about 500 other issues we have with him.
I shall ask him to remove the top pipes and put in the silver bolt things.
I will get the system pressure tested asap although he has yet to fit the boiler. The mega flow is in so I suppose that can be tested and I can check for leaks - although having said that he has screwed all the floor boards down already !!!
I am asuming that unlike eletricity creative plumbing is not really dangerous - is it ?
In an ideal world how should the radiators have been fitted as this is a whole new system we have put in from scratch. |
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Hoovie
Devon DIYer
Joined: 27 Jul 2007
Posts: 8036
Location: East Devon
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| Posted: Fri Nov 16, 2007 11:31 am Post subject: |
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I don't mean to alarm you, but a Megaflow can only be installed by a certified installer with a G3 certification (I think it is G3) - just like if you are paying someone to install a Gas Boiler, it can only be commisioned by a CORGI registered Installer.
If you feel a bit unconfortable about the quality of his work, I would be inclinded to ask in a subtle way to confirm that he has the neccessary certs AND that he will be notifying the local Bulding Control Officer of both the Boiler Install AND the Megaflow Install (both of these are legal requirements)
He sounds a very confident chappy by fixing down the boards before testing the system  Are you sure he hasn't actually dry-tested it already?
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nigmyk
Junior Member
Joined: 14 Jul 2007
Posts: 22
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| Posted: Sat Nov 17, 2007 6:49 pm Post subject: |
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Viewed as a flow system, putting in pipes at the top as well will slightly decrease the resistance to flow, but not much. The overall flow rate will not change much as the inlet and outlet pipes to the system are unchanged in both cases. All that changes is the way water flows between the radiators. I prefer the second (single pipe system) because in the 2 pipe system the hottest water will rise to the top and stay there and exit into the next radiator with out heating the lower part of the radiators as much. Water is always fed into radiators at the bottom to ensure the cold water is swept out. In the two pipe system it appears that the cold water at the bottom of the radiator will be pushed round the sytem with cooler water from the previous radiator and not with hotter water and I would expect the lower half of the last two radiators to be noticeably cooler. I would try it as it is with the current system and if there is a noticeable thermal gradient from top to bottom then i would consider changing it.
Mind you, read my recent plumbing experience in my other posts today and you may think it best to ignore my comments |
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