Non Return Valve on low pressure system

[GGg]

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.

 

[SimonG]

Plumb things in properly.

 

[Aire]

Did you fit a single or twin check valve?

 

[GGg]

Cheers for the helpful response

 

[GGg]

Cheers for the helpful response

Singe valve

 

[GGg]

Plumb things in properly.

Cheers for the helpful response

 

[SimonG]

Cheers for the helpful response

Anytime.

 

[Sharp Point]

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.

Pipe it up correctly.

 

[GGg]

Pipe it up correctly.

Zzz. Polly want a cracker. Elaborate?

 

[ShaunCorbs]

Negative head pump or pipe it up properly with balanced feeds