• Welcome to PlumbersForums.net (formerly UKPlumbersForums.co.uk). Please login with your usual username and password. Or register for free if you haven't already done so.

Discuss Solution for low head pressure. in the Bathrooms, Showers and Wetrooms area at PlumbersForums.net

Old Ford

New Member
Messages
9
Reaction score
0
As title says I'm looking for a solution for low head pressure.
I live in a townhouse, it has 3 bathrooms. The 2 bathrooms on the top floor have always suffered from low pressure when showering.
Just had to replace one of the shower valves and searching around I found a suitable low pressure replacement which matched the existing pipe centres, unfortunately the showering experience is awful.
I would like to increase the pressure for the top floor bathrooms, checking the pipework for the house it starts to get a bit complex.
Both bathrooms are fed from separate cold water feeds on the header tank and their hot water supply is fed from a vented cylinder with 1 of the bathrooms on an Essex flange.

I was considering the possibility of raising the header tank by 1 metre, there is approximately 1.4 metres free space above the tank, which should give me another 0.1 bar pressure, at present there is just about 1 metre head between the bottom of the tank and the top of the shower head.

The tank is ridiculously large, 135x70x65 cm (wdh) and my rough estimate is it holds 500 litres? so I know its going to need masses of support.

Have I missed the obvious anywhere, just raise the tank and extend the pipework?Header Tank.jpg

The picture show my tank, the right hand side pipe at the front supplies the bathroom with the really bad pressure + the rest of the house (including the 3rd bathroom on the 1st floor). The pipe to the left is for the other bathroom on the top floor.
The pipe lower left side is for the hot water cylinder with the water inet/ballcock above. The cylinder vent pipe entering the tank from above.

If a booster pump(s) could be the solution, I don't see how they could be easily fitted without destroying the bathrooms getting to the pipework.
 

Riley

S. Mod
Trusted
Plumber
GSR
Messages
10,622
Reaction score
3,451
0.2 bar will make next to no difference
 

Craig Watson

Plumber
GSR
Messages
1,690
Reaction score
618
To be honest, fitting a pump isn't as bad as you think. Pump in the airing cupboard at the base of the cylinder, where you can easily attach onto the hot supplies, then pipe up into the loft and pick up your bathroom cold supplies from there.
Its more about sizing the pump correctly to run all your bathrooms, having enough cold stored water and making sure you have a large enough cylinder to cope with the extra demand.
What's your cold mains pressure, have you considered switching to unvented as an option?
 
OP
O

Old Ford

New Member
Messages
9
Reaction score
0
I dropped the shower head in the bathroom by 1 metre and measured the flow, it goes from 3.5 litres/min to 4.5 litres/min. Not a great improvement I know but if raising the header tank is not the solution what are my options using booster pumps seeing that I can't access the hot/cold pipes close to the shower valves.
 

Craig Watson

Plumber
GSR
Messages
1,690
Reaction score
618
I dropped the shower head in the bathroom by 1 metre and measured the flow, it goes from 3.5 litres/min to 4.5 litres/min. Not a great improvement I know but if raising the header tank is not the solution what are my options using booster pumps seeing that I can't access the hot/cold pipes close to the shower valves.
If it's just the showers your wanting to boost and you can't get to the pipes easily then it becomes a bigger job. Or you can attach to the cold feeds in the loft and boost the whole bathroom. Other than that have you tried a shower hose with a larger internal diameter?
 

Riley

S. Mod
Trusted
Plumber
GSR
Messages
10,622
Reaction score
3,451
Get a plumber in to discuss your needs
 
OP
O

Old Ford

New Member
Messages
9
Reaction score
0
The hot water cylinder is large, I don't know the bar pressure but I would say that we have good pressure here. Looks like I need to get specialist advise.
Could the existing cylinder be used unvented or is a new cylinder required. I have no experience of unvented systems.
My neighbour had a pump fitted in his loft when he modernised one of his bathrooms, works great for him, but it did flood his house and cause £1000's of damage when one of the plastic push fit pipes popped off.
 
OP
O

Old Ford

New Member
Messages
9
Reaction score
0
Yes, I have a large diameter shower hose and tried different heads.
 

SimonG

Trusted
Plumber
Esteemed Member
Messages
18,243
Reaction score
9,788
Lofts not the ideal place for a pump.

Worth investigating unvented option or digital showers.
 

Riley

S. Mod
Trusted
Plumber
GSR
Messages
10,622
Reaction score
3,451
The hot water cylinder is large, I don't know the bar pressure but I would say that we have good pressure here. Looks like I need to get specialist advise.
Could the existing cylinder be used unvented or is a new cylinder required. I have no experience of unvented systems.
My neighbour had a pump fitted in his loft when he modernised one of his bathrooms, works great for him, but it did flood his house and cause £1000's of damage when one of the plastic push fit pipes popped off.
Based on the question re using your existing cylinder as unvented you do not have the knowledge and really really need some proper guidance preferably from a G3 qualified engineer
 

Riley

S. Mod
Trusted
Plumber
GSR
Messages
10,622
Reaction score
3,451
Why didn't I think of that :rolleyes:
I’m not being cynical or taking mick. Sometimes it’s the easiest solution as they can see all your pipework and test to give you the options on the other end of a keyboard we can’t. For what it’s worth I’d investigate unvented and wouldn’t waste time with 0.1 of a bar
 
OP
O

Old Ford

New Member
Messages
9
Reaction score
0
I’m not being cynical or taking mick. Sometimes it’s the easiest solution as they can see all your pipework and test to give you the options on the other end of a keyboard we can’t. For what it’s worth I’d investigate unvented and wouldn’t waste time with 0.1 of a bar
I agree, thanks, and thanks to all for suggestions.
I tried to be as detailed as possible with my issue and I will ask my plumber to drop by when he's in the area.
 

Riley

S. Mod
Trusted
Plumber
GSR
Messages
10,622
Reaction score
3,451
You can be as detailed as you like it was more the tone of your questions that concerned me ie the unvented. Please ensure your plumber is G3 qualified to work on unventedw
 

Jim Goodenough

Plumber
Messages
424
Reaction score
110
As title says I'm looking for a solution for low head pressure.
I live in a townhouse, it has 3 bathrooms. The 2 bathrooms on the top floor have always suffered from low pressure when showering.
Just had to replace one of the shower valves and searching around I found a suitable low pressure replacement which matched the existing pipe centres, unfortunately the showering experience is awful.
I would like to increase the pressure for the top floor bathrooms, checking the pipework for the house it starts to get a bit complex.
Both bathrooms are fed from separate cold water feeds on the header tank and their hot water supply is fed from a vented cylinder with 1 of the bathrooms on an Essex flange.

I was considering the possibility of raising the header tank by 1 metre, there is approximately 1.4 metres free space above the tank, which should give me another 0.1 bar pressure, at present there is just about 1 metre head between the bottom of the tank and the top of the shower head.

The tank is ridiculously large, 135x70x65 cm (wdh) and my rough estimate is it holds 500 litres? so I know its going to need masses of support.

Have I missed the obvious anywhere, just raise the tank and extend the pipework?View attachment 38717

The picture show my tank, the right hand side pipe at the front supplies the bathroom with the really bad pressure + the rest of the house (including the 3rd bathroom on the 1st floor). The pipe to the left is for the other bathroom on the top floor.
The pipe lower left side is for the hot water cylinder with the water inet/ballcock above. The cylinder vent pipe entering the tank from above.

If a booster pump(s) could be the solution, I don't see how they could be easily fitted without destroying the bathrooms getting to the pipework.
Old Ford, have you checked inside the cold water storage tank that the outlet's aren't blocked at all (unlikely from your photo), secondly that the 'gate' valves (red wheel head valves) are fully open, turned ACW. These are very basic check's however you may not have considered.
 

Forum Sponsors

Corgi - Plumbing Supplies for Professional Plumbers

Plumbase - Plumbing Parts for Plumbers

Underflor Heating Systems by uHeat

Wetroom Supplies by Wetroom Store

Nicobond - Wetroom and Tiling Supplies

Corgi - Plumbing Supplies for Professional Plumbers

Top Bottom