Buying a mixer tap

longwalks1

I need to replace the mixer tap in our downstairs toilet wash basin, what (if any) measurements do i need to be concious of, or are they all a pretty much standard/universal fit?

Le_Kirk

Size (diameter) of hole/holes through basin. Centre distance of holes. Size of thread on existing tap/nut 15 or 22mm.

phill99

They are all a standard size. As long as it is for a basin and not a bath, it will fit.

Ectophile

If you have a low pressure hot water system (cold tank in loft, hot tank in airing cupboard), then make sure you get one suitable for low pressures. Some are only suitable for mains-pressure systems.

longwalks1

Thanks all

Ectohpile, we have a low pressure system (kitchen hot tap and bathroom sink tap the pressure is just a trickle - very frustrating)

What differs in the tap design for a low pressure system? Genuinely interested...

Ectophile

Taps for high pressure systems will restrict the flow rate so the water doesn't gush out too fast. But on a low-pressure system, you need all the flow you can get, so you need a tap with a wider opening internally.