Mains water pressure

[txema027]

My client has had problems with their mains pressure since they moved in 5 years ago. We changed boiler to a Worcester 440 Highflow, and upgraded the mains supply to 22mm from the water mains. Still the flow is around 10litres per second. We have had countless visits from Wessex water and they have changed their side completely to the mains pipe. Still no change. What has all of us disconcerted is that the reading of flow at the stopcock is 23litres and four metres after a brand new pipe it reads 11. Is it possible that the flow drops that much in four metres? There are no blockages inside the pipe or kinks.

Help,please! Don't know what else I can do!!

 

[adlplumbing]

try changing the taps as it may have blockage their

 

[JohnD]

You are measuring the flow at the stopcock from an open pipe, are you?

What are you measuring it from, at at the end of your new pipe?

No internal stopcocks, ballofix or teeny tap tails?

 

[txema027]

try changing the taps as it may have blockage their

The drop in pressure is form th water meter to the turn off tap in the garage. Everything is brand new.

What I cannnot get around is the huge drop in flow. It basically halfs.

Thanks for your reply, though.

 

[JohnD]

as you talked about a reduction in flow, what size and type is the internal stopcock you mentioned, and how are you measuring the flow through it?

When you say "to" the internal stop cock, you mean you are measuring the flow through the pipe when you disconnect it from the stopcock? Or do you mean out of the stopcock when you disconnect the pipe from the House side of it?

When you say there is a drop in pressure, do you mean pressure? Or do you mean flow? What is the pressure anyway?

 

[txema027]

as you talked about a reduction in flow, what size and type is the internal stopcock you mentioned, and how are you measuring the flow through it?

When you say "to" the internal stop cock, you mean you are measuring the flow through the pipe when you disconnect it from the stopcock?

When you say there is a drop in pressure, do you mean pressure? Or do you mean flow? What is the pressure anyway?

Wessex water has taken the readings for us. The first reading is taken in the street stopcock and the second reading (the one in the garage/property) in the property's stopcock. This one has an adaptor form 22mm to 18mm-brand new and checked twice.

The pressure in the street's stopcock is almost 2,5 bars and it drops to 1,5.

Any ideas/suggestions? Wessex has renewed the meter, and upgraded the connection from the meter to their mains

 

[txema027]

You are measuring the flow at the stopcock from an open pipe, are you?

What are you measuring it from, at at the end of your new pipe?

No internal stopcocks, ballofix or teeny tap tails?

Measuring form the propoerty's stopcock. And yes there are no ballofix, teeny tap tails or neighbour's sharing it.

Any other posibilities?

 

[JohnD]

as you talked about a reduction in flow, what size and type is the internal stopcock you mentioned, and how are you measuring the flow through it?

When you say "to" the internal stop cock, you mean you are measuring the flow through the pipe when you disconnect it from the stopcock? Or do you mean out of the stopcock when you disconnect the pipe from the House side of it?

I still don't know if you're measuring the flow gushing out of an open pipe, or in some other way.

And you haven't replied about your stopcock either

 

[txema027]

as you talked about a reduction in flow, what size and type is the internal stopcock you mentioned, and how are you measuring the flow through it?

When you say "to" the internal stop cock, you mean you are measuring the flow through the pipe when you disconnect it from the stopcock? Or do you mean out of the stopcock when you disconnect the pipe from the House side of it?

I still don't know if you're measuring the flow gushing out of an open pipe, or in some other way.

And you haven't replied about your stopcock either

Hi John,

Many thanks for having a look into this.

The stopcock in the property is a two way 25mm x22mm in brass. Yes we also replaced the feed to the boiler to maximise the pressure and flow

Wessex water is using a device that fits in the 22mm pipe that measures noth pressure and flow. Unfortunately mine one just measures the pressure.

Is this what you were asking me? Excuse me for not answering all your questions before.

Am I right that the problem may be within the street mains?

I look forward to your feedback.

A

 

[JohnD]

OK

what doen't make sense to me is that:

the reading of flow at the stopcock is 23litres and four metres after a brand new pipe it reads 11.

so either they are measuring water gushing out of an open pipe, or there is a leak.

You can't have 23 lpm going into a pipe and only 11 lpm coming out.

maybe one measurement was at an open pipe and one was out of a tap

a picture of your stopcock might trigger some ideas. what do you mean by two way?

is the pipe between meter and internal stopcock plastic or copper?

using a bucket and a watch, how many lpm come out of the kitchen tap? a photo of that tap, and its tails, would also help. i can't help feeling that it is your tap that is obstructing the flow.

 

[txema027]

OK

what doen't make sense to me is that:

the reading of flow at the stopcock is 23litres and four metres after a brand new pipe it reads 11.

so either they are measuring water gushing out of an open pipe, or there is a leak.

You can't have 23 lpm going into a pipe and only 11 lpm coming out.

maybe one measurement was at an open pipe and one was out of a tap

a picture of your stopcock might trigger some ideas. what do you mean by two way?

is the pipe between meter and internal stopcock plastic or copper?

using a bucket and a watch, how many lpm come out of the kitchen tap? a photo of that tap, and its tails, would also help.

Yes you are right!!! It is not posible that with no leak and a brand new blue plastic 25mm pipe ther is such a drop. Both readings are taken from taps of the same characteristics, no open pipe.

Two way: in at 25mm out at 22mm.

I will take some photos tomorrow afternoon, with daylight, and upload them in the evening.

Again thnak you so much for your feedback

 

[Agile]

You have not very clearly explained your involvement apart from calling the owner your Client and saying "we fitted a HiFlow 440 and a new water supply pipe".

If you fitted a new boiler then presumably you are Gas Registered and perhaps qualified in accordance with the Water Regulations if you fitted a water supply pipe.

In that case you may be better posting in the trade section of the forum for gas engineers called the Combustion Chamber where we will be happy to help you.

Tony

 

[simond]

Why? What is pertinent in this enquiry to the combustion chamber? What has the query got to do with combustion?

I hope this chap isn't a boiler installer, seems to have no knowledge of water pressure and flow issues.