Non Return Valve on low pressure system

[Riley]

Don’t think all mixer outlets are h&c pumped some are hot pumped and mains cold

 

[Aire]

Don’t think all mixer outlets are h&c pumped some are hot pumped and mains cold

I see. In that case then the only thing that will work is fitting a universal pump like Shaun recommends.

 

[chris watkins]

It is in my nature to try to help people, I guess that's why most of us post on here.
Some OP'ers come across in such a way as to make it impossible for me.
Wonder if they have an inking of just how their attitude to others comes across in their pithy one-liners?

 

[Rob Foster]

Hi,

Previously wrote on here as the tank in the attic was overflowing due to mains pressure back flow up the hot water tank fed pipes.

Resolved this issue with a NRV on the hot pipe coming from my twin pump. (See pic)

Solved my issue but because the NRV is spring loaded the pump doesn’t turn on when I open the hot tap because the pressure isn’t enough to trigger. Either have to turn cold on the bath which activates the pump and then turn on the hot or run the hot downstairs in the kitchen which activates the pump as enough pressure.

What are my options?

Thanks.

Can you put up a system diagram so we can all have a helpfull look
centralheatking

 

[Riley]

We know the problem Rob its a mixer back feeding which we said to replace.

 

[Welder]

Some OP'ers come across in such a way as to make it impossible for me.
Wonder if they have an inking of just how their attitude to others comes across in their pithy one-liners?

Did you deliberately omit 'entitled' Chris?