Poor HW pressure

[Bogart]

Another bit on the saga of the new kitchen sink/tap /waste arrangement. Waste now sorted only problem now is the proverbial poor pressure using a monobloc mixer tap. The cold provides 9L/min whilst the hot is 2.75L/min yes 2.75. In the attached piccy you can see the setup. The tap came with both the solid and flexible 10mm
pipe/hose. There is not room to get just the flexible straight into the base of the tap hence the metal portion. The hot is supplied via a F/E tank which with 'normal' taps
gives a decent flow as is 15mm all the way to the tap. You can see that this tap has JG emergency shut off valves on hot and cold which are themselves restrictive. Further back along the line are another pair of the same valve. Now to my mind all these restrictions are the cause of the poor hot flow. Up near the hot water cylinder
is Stuart Turner monsoon twin shower pump. Could this be incorporated into the system to overcome the poor pressure. Or should I really be concentrating on getting these poor restrictions out of the way ie full bore valves, there is not anything I can do, as far as I see, with the actual tap connections themselves.

 

[Bogart]

Hi Bogart

I have a similar issue to yours. Have you solved the poor flow-rate at hot outlet issue? Mine is 4.5 litres per minute but that is really poor so I can’t but imagine what your issue looked like.

Let me know if/ how you have overcome the problem ***. 0.1 bar taps?

Am going to install a pump on the hot water side. Been meaning to do it for weeks now but as usual other things get in the way. Maybe I should sort it now so can tick another box off.

 

[Mdljk]

Whole house pump on hot would transform your problem taps .
Check how much water storage you have as a first move these pumps can rapidly empty a cold feed tank!

👍

 

[Mdljk]

Am going to install a pump on the hot water side. Been meaning to do it for weeks now but as usual other things get in the way. Maybe I should sort it now so can tick another box off.

Hi Bogart

Company have now agreed to fit full-bore service valves in place of the standard 15mm valves currently in place. If that is brings no significant improvement I may follow you down the pumped hot water route.

Thanks for the reply

 

[Bogart]

Hi Bogart

Company have now agreed to fit full-bore service valves in place of the standard 15mm valves currently in place. If that is brings no significant improvement I may follow you down the pumped hot water route.

Thanks for the reply

I would doubt full bore service valves will make much, if any, difference, but every little helps.

 

[Mdljk]

I would doubt full bore service valves will make much, if any, difference, but every little helps.

My thoughts exactly Bogart. The service valves ARE throttled down to 10mm ball/bore but they connect to 10mm copper then tails - yes - full-bore eliminates only about 2 inches of 10mm pipe. Still, as you say, every bit helps and you never know. I may have a go at removing the aerator. I've heard they can harbour factory debris.

Cheers

 

[Bogart]

My thoughts exactly Bogart. The service valves ARE throttled down to 10mm ball/bore but they connect to 10mm copper then tails - yes - full-bore eliminates only about 2 inches of 10mm pipe. Still, as you say, every bit helps and you never know. I may have a go at removing the aerator. I've heard they can harbour factory debris.

Cheers

Go for it nothing to lose. Fitting a HW pump is near the top of my list for post Easter jobs.