Rainwater tap has no water pressure
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Yes, the pump is engaging. The tap is mounted on the house wall as below:
http://i1055.photobucket.com/albums/s518/lilianac1/DSC01612.jpg
I read on another thread that you have used the pump to supply water to the washing machine. Does the pump still supply water to the washing machine?
Is this the first time that you have tried using the tap?
Have you opened the tap without the hose attached?
How many litres per minute is the slow flow?
Second thing to do is to take the hose off, put a bucket under the tap and turn the hose on and see what happens..
Flow rate isn't critical for filling toilets or even washing machines. Who cares if it takes an extra minute to fill the cistern or put some rinse water in the machine.
Watering a garden is a different game. If you wan't to run a sprinkler you may need a more powerful pump with a higher flow rate.
Okay so the washing machine is still working and there is water pressure without the hose attached. So it must be the hose slowing it down.
I recently posted the following on this thread - viewtopic.php?f=35&t=61491
"For garden watering, you are better off to buy an 18 mm garden hose and attach a short length (maybe 1.5 metres) of 12 mm garden hose to the end so that you can use the standard 12 mm hose fittings. You join the two hoses by using a poly 18-12 mm reducer and two s/s worm clamps. At 20 litres per minute, the 18 mm hose has 8 times less friction loss".
12 mm garden hose has a friction loss of approximately 6 kPa per metre at 20 litres per minute.
Tech Info
IP44.
Max suction: 7m (with foot valve).
Max flow: 80 lpm.
Max head: 45 metres.
Inlet: 25mm BSP female.
Outlet: 25mm BSP female.
The Davy pump for 1- 4 outlets we should have had seems to have a maximum flow rate of 100 lpm.
The IP rating is explained on this thread... http://creativepumps.com.au/zpumps/ligh ... rating.htm
You have a powerful pump, bigger than I would have recommended for your needs. Given the short distance between the pump and the rainwater garden tap, I believe that the connecting pipe work used is small diameter. PLUMBERS!!!
For academic interest, put a 20 litre bucket under the tap and see how long it takes to fill. I can do a friction loss calculation if I know the flow rate. If I also know the approximate pipe length between the pump and the tap, I can then calculate the pipe size used.
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