Check valves needed?

[HiZ]

Installing a bath shower mixer valve with thermostat (Grohe) and also a monoblock basin mixer.

The shower is a flexi pipe type and not hard fixed to the wall. Heating system is getting converted to a combi.

Where shall check valves be fitted (if any) as it would be better for me to put them before both the basin and the bath.

Cheers

 

[Agile]

Check the installation instructions!

Generally a non return valve is required in both hot and cold feeds to a mixer shower. The shower may have them built in.

Tony

 

[HiZ]

Instructions doen't suggest anything....

Neither do they say that a valve is fitted internally.

 

[Agile]

With a top of the range unit I am surprised ( unless its a Chinese copy! )

It probably does have them built in. You can either call their tech help or fit them regardless as they only cost about £1 each!

Tony

 

[HiZ]

Just wrapped my lips around the shiny end and gave it a good suck. I could only get it to blow.....

Looks like they are built in....

 

[ChrisR]

Theirs usually have them built in. I ripped them out of mine as they're horribly restrictive little things, and put 22mm ones in the pipes.