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Low Flow/Pressure

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Working pressure on mains 1.5 bar,
working pressure on outlets, around 0.5 bar by my calculations!!
 
That's what I did, definetly taps causing issues
 
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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.
 
Toxic Ted said:
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.
Click to expand...

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.
 
Jase, did you bypass the softener and test.
Unless it's a hiflo type softener you can easily lose a bar there !
 
BLOD said:
Jase, did you bypass the softener and test.
Unless it's a hiflo type softener you can easily lose a bar there !
Click to expand...
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
 
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.
 
Most modern basin taps are restricted to 6 litres, so nothing wrong there.
 
These are what they are:
taps&showers.png


The only exception is the utility room tap which is a random one from Wickes.
 
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2 bar standing pressure at garden tap ? how many floors has the house got ? did you measure the dynamic pressure ?
 
BLOD said:
2 bar standing pressure at garden tap ? how many floors has the house got ? did you measure the dynamic pressure ?
Click to expand...

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).
 
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.
 
Ermintrude said:
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.
Click to expand...

I will leave it to jase to answer the "technical" questions, but for my benefit, would a blockage really result in what we are experiencing? We know we are getting 18l/min after the water softener and to the taps... just went multiple taps are on the flow drops to about 4l/min.
 
Sounds to me like a restriction in there somewhere. I've had foreign objects in the pipework before from a pebble to marbles (disgruntled builder), but when this is the case you normally get a spurt of decent pressure followed almost instantly by the drop.
 
Toxic Ted said:
Sounds to me like a restriction in there somewhere. I've had foreign objects in the pipework before from a pebble to marbles (disgruntled builder), but when this is the case you normally get a spurt of decent pressure followed almost instantly by the drop.
Click to expand...

I think the pressure/low is consistent when an outlet is turned on, until another one is turned on.

How would one go about confirming there is a blockage, locating it and then clearing it?
 
I would look back to post #26 Jase, if the water board are to be believed at the meter you have 24ltr a min and at the stop tap as the new main enters the house you have 18ltrs a min! How longs the new water main? Your losing upto 6ltrs a min just their!
 
Ch4 plumbing said:
I would look back to post #26 Jase, if the water board are to be believed at the meter you have 24ltr a min and at the stop tap as the new main enters the house you have 18ltrs a min! How longs the new water main? Your losing upto 6ltrs a min just their!
Click to expand...

It is about 15m of the blue pipe, which is going straight from the water meter to the stopcock.
 
Ch4 plumbing said:
Could even be a possible fault with the nrv in the meter.
Click to expand...

The Affinity Water guy who came to check everything a while back said all that was fine. His conclusion was that our builder had kinked the pipe, but he only checked the mains, meter and the water tap in the back garden.
 
That's a fair assumption, the other question I'd ask is did the builder flush the main thoroughly before connecting onto the new system within the house?
 
You could search for the 6 litres for ever. You currently have with no restrictions 24lpm. Even that is poor for a property your size.
To make things work well the system should have been designed to give EACH bathroom between 20-30lpm.
 
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