15mm Hot pipes
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probably not unless the hot water source is fairly close - 22mm carries twice the volume of water of 15mm, so all that cold water needs to be flushed through before the warm stuff arrives.
personally i wouldn't change the spec.
personally i wouldn't change the spec.
Depends on the type of hot water system you have.
An open vented hot water system may require 22mm to allow a reasonable flow rate with the limited water pressure available.
Most pressurised systems and combi boilers will work fine with 15mm.
An open vented hot water system may require 22mm to allow a reasonable flow rate with the limited water pressure available.
Most pressurised systems and combi boilers will work fine with 15mm.
As it's only going to a basin 15mm will be ok, as the tap connectors are 15mm. Also be aware that if you have isolation valves on the hot and cold pipes, they will further restrict the flow.
If you have gravity fed supplies then be aware that some mixer taps are only suitable for high pressure i.e. mains or pump fed.
Hope this helps.
If you have gravity fed supplies then be aware that some mixer taps are only suitable for high pressure i.e. mains or pump fed.
Hope this helps.
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Thank's everyone some good points for and against there, but I'm still in 2 minds. A bit more info, system is gravity fed and it's about 10m run to the basin. I'll make sure I buy a mixer tap suitable for gravity fed
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