Advice on mains flow rate

[Madrab]

It will probably comply with their SLA yes - but if their neighbour has access to ~20L/Min and the issue is on their comms pipe then that can still their responsibility to sort it out. Especially if it can be proven that the district main is sufficient and it's their pipe @ issue and it then hinders the possibility of installing a green heat source.

There's a great discussion with UU to be had there and a case to be made, especially if they already tested @ the property and neighbours and reported the disparity but it does still need to be proven where the bottleneck is.

All comes down to how far the OP wans to take it.

 

[karlbbb]

Thanks for everyone's input.

I ended up opening up that cover (which indeed seems to be a meter fitment). In there I found some stones - one which was stuck just after the main tap, and took a bit of working with a couple of screwdrivers and pliers, and a couple of smaller ones in the "send" part of the fitment. Having managed to get them out, it still hasn't fixed the flow inside.

Pictures attached - the flow seems to be an "around and over" deal.

I guess I need either UU or someone with some kind of meter fitment to attach to the outside unit and get a flow rate reading there too? That way we'll know if this boundary box tap/fitting is faulty, or (hopefully not) there's some kind of leak under the house. I don't know if there's anything further I can do here.

 

[Madrab]

The adapter will need to have an inlet and and outlet to allow it to be flowed through a meter properly, hence the design. Stones in it probably from the connection time. As it's a meter fitting they may have an adapter that fits it to provide a connection for testing.

Alternatively the typically the DIN sizes for concentric meters would be 11/2", so a 11/2" male to female reducer would probably work, that would allow a test feed to be made up with gauge and valve outlets.

 

[karlbbb]

The adapter will need to have an inlet and and outlet to allow it to be flowed through a meter properly, hence the design. Stones in it probably from the connection time. As it's a meter fitting they may have an adapter that fits it to provide a connection for testing.

Alternatively the typically the DIN sizes for concentric meters would be 11/2", so a 11/2" male to female reducer would probably work, that would allow a test feed to be made up with gauge and valve outlets.

I've got a second UU engineer visit booked for a couple of weeks time now. I'm hoping they have similar equipment to this to be able to test the flow rate: https://vernonmorris.co.uk/shop/item/digital-boundary-flow-pressure-test-kit/

 

[Dereekoo]

I've got a second UU engineer visit booked for a couple of weeks time now. I'm hoping they have similar equipment to this to be able to test the flow rate: https://vernonmorris.co.uk/shop/item/digital-boundary-flow-pressure-test-kit/

When he does make sure you he gives you the dynamic pressure at the meter and hopefully one at the kitchen tap so the losses in the supply pipe are determined which can then be crossed checked with the theoretical losses.

 

[Gasguru]

Be aware that many meter adapters have single or double checkvalves built in.
I don't know whether they are accessible to clean out but it's likely they will be full of debris too.

 

[karlbbb]

Be aware that many meter adapters have single or double checkvalves built in.
I don't know whether they are accessible to clean out but it's likely they will be full of debris too.

View attachment 395269

You can just about make out the hex pattern around the bottom so I assume it would unscrew for me to try and clean it out too - I just sadly don't have the right size adapter to get it out.