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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Water flow measurement - flow cup or similar?
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 |
#2
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Water flow measurement - flow cup or similar?
On 23/03/2013 14:13, David.WE.Roberts wrote:
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 :-) 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) -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
#3
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Water flow measurement - flow cup or similar?
On 23/03/2013 15:32, John Rumm wrote:
On 23/03/2013 14:13, David.WE.Roberts wrote: 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 :-) 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) 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. |
#4
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Water flow measurement - flow cup or similar?
On Sun, 24 Mar 2013 15:36:34 +0000, robert wrote:
On 23/03/2013 15:32, John Rumm wrote: On 23/03/2013 14:13, David.WE.Roberts wrote: 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 :-) 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) 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. 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 |
#5
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Water flow measurement - flow cup or similar?
In article ,
"David.WE.Roberts" writes: On Sun, 24 Mar 2013 15:36:34 +0000, robert wrote: On 23/03/2013 15:32, John Rumm wrote: On 23/03/2013 14:13, David.WE.Roberts wrote: 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 :-) 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) 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. I would like to have a longer period than 5 seconds for the test because start/stop errors could skew the results. Run the flow for longer, but just direct 5 or 10 seconds worth mid flow into a container. 10 litre bucket sounds about right. -- Andrew Gabriel [email address is not usable -- followup in the newsgroup] |
#6
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Water flow measurement - flow cup or similar?
On Sun, 24 Mar 2013 22:31:27 +0000, Andrew Gabriel wrote:
In article , "David.WE.Roberts" writes: On Sun, 24 Mar 2013 15:36:34 +0000, robert wrote: On 23/03/2013 15:32, John Rumm wrote: On 23/03/2013 14:13, David.WE.Roberts wrote: 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 :-) 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) 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. I would like to have a longer period than 5 seconds for the test because start/stop errors could skew the results. Run the flow for longer, but just direct 5 or 10 seconds worth mid flow into a container. 10 litre bucket sounds about right. 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 |
#7
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Water flow measurement - flow cup or similar?
On 25/03/2013 14:46, David.WE.Roberts wrote:
On Sun, 24 Mar 2013 22:31:27 +0000, Andrew Gabriel wrote: In article , "David.WE.Roberts" writes: On Sun, 24 Mar 2013 15:36:34 +0000, robert wrote: On 23/03/2013 15:32, John Rumm wrote: On 23/03/2013 14:13, David.WE.Roberts wrote: 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 :-) 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) 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. I would like to have a longer period than 5 seconds for the test because start/stop errors could skew the results. Run the flow for longer, but just direct 5 or 10 seconds worth mid flow into a container. 10 litre bucket sounds about right. 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. 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. -- Cheers, John. /================================================== ===============\ | Internode Ltd - http://www.internode.co.uk | |-----------------------------------------------------------------| | John Rumm - john(at)internode(dot)co(dot)uk | \================================================= ================/ |
#8
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Water flow measurement - flow cup or similar?
On Mon, 25 Mar 2013 19:42:58 +0000, John Rumm wrote:
snip 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. 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. 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 |
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