Water flow measurement - flow cup or similar?

[David.WE.Roberts]

Is it worth laying out for a flow cup or similar, instead of calibrating a bucket with a measuring jug?

If so, can anyone recommend a suitable flow cup?

Preferably easily available and cheap :-)

Cheers

Dave R

[John Rumm]

A known capacity bucket is by far the simplest. Larger volumes make for somewhat more accurate measurements (i.e. a 14l bucket will be better than a 1l jug)

[robert]

Unless you are looking for accurate figures ( not sure for what purpose) roughly timing how long it takes to fill a 2 litre jug or 10 litre bucket ( they usually have a capacity mark on them) should provide figures accurate enough for benchmarking or looking for problems.

I have flow figures at different outlets of between 5 and 13 seconds for a 2 litre jug.

[David.WE.Roberts]

I would like to have a longer period than 5 seconds for the test because start/stop errors could skew the results.

10 litre bucket sounds about right.

Cheers

Dave R

[Andrew Gabriel]

Run the flow for longer, but just direct 5 or 10 seconds worth mid flow into a container.

[David.WE.Roberts]

Used a 16 litre bucket with a clear panel graded in half litres :-)

Maximum flow was about 17l/min from the outside tap.

Static pressure 3 bar.

Cheers

Dave R

[John Rumm]

Very similar to my last house then... combined with a 35kW combi the performance was ok. One very good shower at a time, or two reasonable ones. Bath filling was a little slow in the winter but not desperately.

[David.WE.Roberts]

24kW British Gas (made by Worcester) combi but it seems to do the job.

So probably one reasonable shower at a time but it is a two bed bungalow so there shouldn't be too much competition for the shower.

Cheers

Dave R