Pipework for CH system
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the central part of the heating system should be in 22mm, and then there should be a range of 15mm take offs where required.
the 22mm pipe acts as a manifold, and you balance the radiators to get the correct flow.
the 22mm pipe usually runs through the centre of the house (in a bungalow it be in the loft, and house would be within the floorboards of the 1st floor, in a town house it be the 1st and 2nd floors). where you branch into 15mm will depend on the location of the radiators.
however also note you can also take feeds from 15mm pipe if the radiator location requires it.
the 22mm pipe acts as a manifold, and you balance the radiators to get the correct flow.
the 22mm pipe usually runs through the centre of the house (in a bungalow it be in the loft, and house would be within the floorboards of the 1st floor, in a town house it be the 1st and 2nd floors). where you branch into 15mm will depend on the location of the radiators.
however also note you can also take feeds from 15mm pipe if the radiator location requires it.
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How much 22mm pipe is governed by the load and flowrate required
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Should have no problems providing you put a return in as well.
Personally preference regards the material, for me the copper is better, the joints when you do have to use them are also less restrictive than the plastic equivalents.
With plastic though it is quicker to install, and you can just drill holes in the joists instead of having to notch the joists.
I feel copper lasts a lot longer and has better integrity.
Also yes if using cooper you want to form as many of the bends as you can ideally as it provides better flow characteristics. The more joints in a system the more restrictions there are.
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Copper every time when possible.
On a layout as sketch a few elbows will be fine.
Using a bender enables the threading of pipes without lifting traps.
On a layout as sketch a few elbows will be fine.
Using a bender enables the threading of pipes without lifting traps.
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