Water pressure

[Dereekoo]

yep, can't argue with that publication but I guess it depends on what section the info comes from

The DG2 (level of service indicator) tests @ 1bar @ 9L/Min as it's min SLA in England and Wales. https://www.ofwat.gov.uk/publications/water-pressure/

Up here in Scotland the bylaws are different. I need to check as it's been years since I did my regs and bylaws though they state the min as a pressure and flow rate too.

They certainly know how to muddy the waters

 

[Madrab]

They certainly know how to muddy the waters

Yep, not kidding, this was always a contentious area between the different authorities and the different counties/countries. I remember they did a UK wide paper on it as there wasn't one standard and no one could agree what that should be, I think that's when OFWAT stepped in for England and Wales.

Even then Watersafe - who were actually formed by the UK wide water industry to try to provide a UK wide view - their guide to checking that the customers are receiving the SLA @ 1Bar is to - use a 4.5L bucket and it should be filled in 30secs - in effect 9L/Min, which as we know doesn't really have anything to do pressure rather it's measuring min flow.

https://www.watersafe.org.uk/advice...r_pressure_that_a_water_supplier_must_supply/

Some transporters used to use a 9 L/Min min standard dictated by the LA, some LA's insisted on 12L/min as a min which is where the limit on mains pumping came from I beleieve but even they realised that some would have difficulty reaching that as not everyone has the same distribution or supply pipework, distance from district pump etc therefore OFWAT tried to standardise it to a min pressure.

Oh and just to add another layer of complexity take a look at the NHBC standard for a new builds supply - https://nhbc-standards.co.uk/8-services/8-1-internal-services/8-1-3-water-services-and-supply/

 

[zad3717]

Bit of an update...

Had UU come out... nice chap, checked both down stairs, up stairs out the front at the stop cock and came to the conclusion my taps are the problem! well kitchen tap.

I have an outside tap ( diy job put in by previous owner) that measured 15lt min at 20m head static. he then did the kitchen and got yep just over 6lt min. trotted off upstairs and it was around 13 / 14 lt a min.

So he offered a suggestion when they come to start the extension, remove from the stop cock the old 15mm and replace with 22mm as there seems to be plenty of flow. He did say going from 1 bathroom to 3 will put a strain on the in coming supply so said the plumbers should be able to work a solution be it storage ( hot water ) etc.

 

[Deleted member 294929]

A large vented hot water tank, a cold feed tank in the loft, a Stuart Turner 3 bar pump and y plan valve. That will give you loads of hot water and the pump will give excellent showers. Keep the boiler just don't use the hot water side of it.

Depends on where the boiler is... if it's by the kitchen sink then just use it for the kitchen sink

 

[Deleted member 294929]

If you have the room I'd fit a break tank and booster set...

 

[Deleted member 294929]

https://www.anglianpumping.com/prod...4CrRnNZbYFoImOvBD_-_Sxy3UZXf-GxxoCJS8QAvD_BwE

All your dreams come true... its a little bit higher than a washing machine. If you have a garage or an old cylinder cupboard it will do the job.

 

[zad3717]

Boiler will be going in the loft, moving it from a bedroom. there will be a bathroom directly below it, kitchen underneath it then the 2 other shower rooms directly opposite... my thoughts where to use the boiler to feed possibly the bathroom and kitchen directly under the boiler and if we go storage to feed the 2 shower rooms from this?

 

[Deleted member 294929]

Keeping the boiler is a must. It's big an juicy. Too big in fact but it's what you have. Use it to feed bath and shower rooms vi's an unvented cylinder. The use the hot water from the combi fir the kitchen. But you will need some sort of booster system