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There are 9 rads above over two floors. 3 of the rads are towel radiators (which oddly never seem to have a problem getting warm).How many radiators on the changed pipe?
Discuss Effect of replacing 22mm copper with 15 plastic in the Plumbing Jobs | The Job-board area at PlumbersForums.net
There are 9 rads above over two floors. 3 of the rads are towel radiators (which oddly never seem to have a problem getting warm).How many radiators on the changed pipe?
Having a brand new water main fitted in 25mm MDPE direct off the 6" main in the street (asked for 32mm, but they said no). Am assuming this will be okay with the megaflo, but there is no way to tell. I'd be surprised if it wasn't.
The water main and gas main are both being replaced and every component on the heating/water system replaced so its impossible to know how it will behave. The only bit to stay the same is the existing pipework (22mm heating, 15mm hot/cold water) with the new hot and cold runs to the riser being in 22mm.
If I ask the builder to re-do the 5m heating stretch in 22mm plastic (which is about 25% smaller cross-section area than 22mm copper?) then I think he'd do that. He hasn't quoted for 10m+ of copper pipe in his quote which means I'll end up having to pay for it. No problem paying this unless the heat difference between the 22mm plastic/copper is marginal - definitely not cutting corners.
I did wonder whether the capability of the pump in the old boiler might have some input into the temperature of the upstairs rads.
alright, i would have thought so. normally its very expensive if thr water board does itIt does mate but they can dig the trench and run everything up to the connection in the street
The water board are inspecting and connecting at the street, and yes its a 750mm trench insulated as it enters the house through the foundation. Builder is doing all that for me.I always thought that upgradinjg mains water supply needs to be signed off and certified? it also hast to be well insulated and installed at least 750mm below floor level
There isn't a new layout really. All of the new extension space is UFH (using VarioTherm). The extent of the works means a lot of localised pipe re-routing which is where my problem comes in. I can't do much about any of the existing heating pipework except to try to maintain appropriate sized feeds as it dissapears into the ceiling void.SO who planned the new layout?
What I’m trying to say though is that if you have radiators not warming correctly now then it’s the prime time to correctly design your system that will have to deal with a greater workload following the extension.
Reply to Effect of replacing 22mm copper with 15 plastic in the Plumbing Jobs | The Job-board area at PlumbersForums.net
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