Low Flow/Pressure

[dancinplumba]

So the tap is losing 1 bar ?

 

[Toxic Ted]

What have you got at the showers and bath?

Any inline strainers on the taps and showers?....you know the rubber washer type.

If the taps are restricting flow then there shouldn't be a reduction when another is opened.

Have the taps got diffusers on the outlet as this is always a crap catcher and often overlooked.

 

[jase158]

What have you got at the showers and bath?

Any inline strainers on the taps and showers?....you know the rubber washer type.

If the taps are restricting flow then there shouldn't be a reduction when another is opened.

Have the taps got diffusers on the outlet as this is always a crap catcher and often overlooked.

6l/min at showers and baths, 0.4 working pressure
No strainers anywhere
Taps all clean, Checked all strainers, Filters etc, no dirt in pipes or taps
Same pressure on taps with filters and taps without.

 

[jase158]

So the tap is losing 1 bar ?

Yeah that's what is worrying, Why is it loosing so much?

 

[BLOD]

Jase, did you bypass the softener and test.
Unless it's a hiflo type softener you can easily lose a bar there !

 

[hshah]

Jase, did you bypass the softener and test.
Unless it's a hiflo type softener you can easily lose a bar there !

I think he did, but if it helps, this is the water softener:
Technical specifications | TwinTec Water Softeners

 

[jase158]

Jase, did you bypass the softener and test.
Unless it's a hiflo type softener you can easily lose a bar there !

Yes and tested before and after water softener and as said before, not loosing any pressure through water softener, hi flow kit fitted on the water softener

 

[hshah]

As Jase mentioned earlier, we have 18l/min just after the stopcock, after the water softener and just before the pipe connects to the taps (after ISO). The fact that the taps have a reduced flow of 8l/min and lower pressure isn't such a big issue because we wouldn't really want more from those taps. However, with 18l/min into the property we should be able to have 2-3 outlets open at the same time, but with 2 taps open the flow drops to about 4l/min out of each tap.

That is our main issue, because whilst someone is showering no one else in the house can use any taps or have the washing machine / dishwasher on.

 

[jase158]

Hshah, where did the taps come from? Did u buy them or did the builder?

 

[Chalked]

Most modern basin taps are restricted to 6 litres, so nothing wrong there.

 

[hshah]

Hshah, where did the taps come from? Did u buy them or did the builder?

We bought them. The kitchen one is a Franke Kubus FilterFlow:
Franke FilterFlow Taps Kubus Hand spray SilkSteel

Trying to find the receipts for the other ones and the showers so I can tell you which ones they are. I do know they are all decent named brands.

 

[hshah]

These are what they are:

The only exception is the utility room tap which is a random one from Wickes.

 

[BLOD]

2 bar standing pressure at garden tap ? how many floors has the house got ? did you measure the dynamic pressure ?

 

[jase158]

https://www.ukbathroomstore.co.uk/phoenix-vp065-round-thermostatic-bar-valve-and-rigid-riser
En suite shower should be fine- suitable for low pressure, minimum of 0.5 bar?

 

[jase158]

Phoenix Square Stainless Steel Thermostatic Shower Column - SC002

This one requires 2 bar minimum pressure?

 

[jase158]

The rest are all low pressure showers so should work ok?

 

[hshah]

The rest are all low pressure showers so should work ok?

The issue is with all the showers and taps... as soon as another outlet is turned on the flow drops significantly.

 

[hshah]

Phoenix Square Stainless Steel Thermostatic Shower Column - SC002

This one requires 2 bar minimum pressure?

Wasn't the pressure coming up to the taps 2 bar? Obviously it will drop a little since its upstairs and would explain why that shower is weaker than the rest, but doesn't explain the flow issue we have.

 

[hshah]

2 bar standing pressure at garden tap ? how many floors has the house got ? did you measure the dynamic pressure ?

Dynamic pressure question is for jase, but I can answer the floors one... 3 floors including ground floor (one shower on ground, two on first and one on second).

 

[Ermintrude]

Ok. Pipe work right sizes? Have u checked that pipe isn't inserted too far into a tee? Or cheap ISO fitted?

Had one where branch on tee obstructed 95% of main pipe.

Not piped in 10mm is it? Sounds very much like an obstruction. 25mm mdpe restricted? Pebble?

Fit a tee on mdpe. Measure flow rate and dynamic pressure.