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

 

[SimonG]

Employ a plumber. You are put of your depth.

 

[GGg]

Negative head pump or pipe it up properly with balanced feeds

Thanks. Found a non return valve with a flap rather than spring loaded for low pressure systems. Will try that.

 

[GGg]

Employ a plumber. You are put of your depth.

Keep fishing Captain Helpalot.

 

[GGg]

Negative head pump or pipe it up properly with balanced feeds

Ideal scenario I would just bring new cold feed down the the shower mixer from the tank but brand new en-suite and new carpet laid on landing doesn’t make this feasible.

 

[WC1]

Discretion being the better part of valour...

 

[ShaunCorbs]

Thanks. Found a non return valve with a flap rather than spring loaded for low pressure systems. Will try that.

Needs to be horizontal not vertically installed then

 

[ShaunCorbs]

Ideal scenario I would just bring new cold feed down the the shower mixer from the tank but brand new en-suite and new carpet laid on landing doesn’t make this feasible.

Ask the carpet fitters to come back and lift it normally around 40-50 to lift and relay a day later etc so no excuse

 

[GGg]

Ask the carpet fitters to come back and lift it normally around 40-50 to lift and relay a day later etc so no excuse

And then rip the tiles up in the bathroom, RIP off all the wall panels remove the shower cubicle and tray. Thanks anyway.

 

[Sharp Point]

I’m out

Where’s the slap your own face emoji?

 

[ShaunCorbs]

And then rip the tiles up in the bathroom, RIP off all the wall panels remove the shower cubicle and tray. Thanks anyway.

Well you didn’t say that but depends where you’ve teed off for the shower wall boards shouldn’t need to come off

 

[SimonG]

Needs a bodge to fix a feck up.

Should have done it properly in the first place.

***smugly chuckles to ones self***

 

[GGg]

Needs a bodge to fix a feck up.

Should have done it properly in the first place.

***smugly chuckles to ones self***

Whatever gets you off eh

 

[GGg]

I’m out

Where’s the slap your own face emoji?

Gutted. You contributed so much.

 

[Riley]

Cheers for the helpful response

Well he’s right mate we were saying find the offending mixer

 

[Aire]

What pump have you installed? It's a twin so obviously feeds hot and cold supplies so I'm confused as to where/how your getting mains backflow up the hot pipe?

 

[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?