Quick Check Valve Question

[chrisab]

Hi,

I've purchased this low pressure mixer valve. Gravity system both hot and cold so should be roughly same pressure (allowing for different losses in pipework). Do i need a check valve (or even double check valve?!) on both the hot and cold inlets or are they not needed for this setup?

[DLMURL="http://www.tapwarehouse.com/product/BQ333-V"]Vellamo Pixo Thermostatic 2 Outlet Shower Valve[/DLMURL]

Also, do i need check valves on this mixer tap?

Vellamo Pixo Basin Mixer Bathroom Taps Modern | Tap Warehouse

many thanks!
Chris

 

[ecowarm]

check valves not needed on ballanced cistern fed supplies

 

[chrisab]

ok thanks for the info, thought that would be the logical case - but then these regs normally aren't are they!

 

[dancinplumba]

think you should have mains fed potable water to your basin cold tap, for cleaning teeth and drinking
imo 🙂

 

[Mike Jackson]

If the cold water storage cistern is correctly covered and insulated it will still be potable. That's why we have to fit a bylaw kit.

 

[dancinplumba]

not for me thanks, ya ever know 🙂

 

[JCplumb]

From what I remember from college (a few moons back) it's fine to feed a bathroom tap from a correctly installed storage tank, it's only kitchen and dedicated drinking taps that need to be mains fed.

 

[dancinplumba]

still not for me 🙂

 

[JCplumb]

Agreed, if it was my house, I know what I'd want.

 

[Mike Jackson]

My mains at home is vile. I've got filters fitted to make it suitable for drinking.

 

[Guest123]

We've got pure, clean water that is crystal clear......in a big glass of whisky.