Adding a booster pump to a secondary system

[SmithO]

Hi, thanks for reading post.

I’m working in a large house which has 3 upstairs bathrooms all with showers and baths. Hot water pressure is very poor so looking to add a booster pump to the hot side. Cold is taken from mains to all bathrooms.

Have added booster pump to system and turned off secondary system pump and valves so no hot water should be returning back to cylinder. But the pump is constantly on and pressure indicator on cylinder is showing large fluctuations. Struggling to trouble shoot why water still returning back to cylinder.

System is quite old so could secondary system valves be perished? There is one immediately before and after the brass pump?

Any advice greatly appreciated. I have a small building contract company, and customer wants us to increase hot pressure.

Many thanks.

 

[SmithO]

That’s correct Shaun.

 

[Riley]

Put in a correctly sized unvented

 

[SmithO]

You are correct and that is what want to do in the next couple of months. Just need to see how can get hot water pressure up with what have at the minute.

 

[Riley]

Would say surely you don’t have the current capacity for three bathrooms??

 

[ShaunCorbs]

Your problem now is stored hot water

What's the cylinder size

And are you heating via top immersion?

 

[Welder]

Somethings not right. Bits of info & patently not plumber nor idea so I'm out.

 

[SmithO]

Your problem now is stored hot water

What's the cylinder size

And are you heating via top immersion?

No, heating via boiler. Immersion is on at minute but has just been turned off when taking pics.

 

[rpm]

Somethings not right. Bits of info & patently not plumber nor idea so I'm out.

I think the butler did it!

 

[SmithO]

Somethings not right. Bits of info & patently not plumber nor idea so I'm out.

What extra info do you want Dave?

 

[SmithO]

I think the butler did it!

 

[Riley]

I think the point is this doesn’t add up. The cylinder that we’ve seen the top of will not have the capacity to feed three bathrooms I can’t believe this has ever worked

 

[Riley]

Are you a plumber?

 

[SmithO]

Are you a plumber?

No, and have never pretended to be on here. I have a building contract company and have a plumber that is away over Xmas. Needed to see if I can get hot water pressure in short term before putting in an invented system.

Will the cyclinder not work due to the capacity?

 

[SmithO]

Have answered every question that has been asked. Just looking for some advice.

Many thanks.

 

[ShaunCorbs]

Should be fine if you run one bathroom at a time but won't last with all 3 going at the same time less than 5 mins on full load