I would just like to say

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With all the debate on this we need the output specs of the pump :rolleyes:.
The pressure will be greatest at the pump or water inlet in situation B then A then C.

J
We need to know the diameters of the pipes, nozzles, the quantity of water flowing and the pressure in the pipe. But at the end of it all, the pressure just outside all of the pipes is atmospheric.
 
Need to know the pressure in the pipe and diameter of pipe. And any hydraulic head. Then the velocity at the pipe exit can be worked out. Muck cleaning ability is the impact of the jet when it hits something (in this case a tratter door), which is the mass x velocity of the water jet.
When yer squeeze the end ovva hose pipe the watta squrts oot further. Thas coz its forced oot under more pressure. Thas coz a big fing is trying to escape frew a small ole.
 
...and just before I go off to bed.
I think I have been taught a £102 lesson.
Not to be impatient.
I stripped down that stopcock and there is naff all wrong with it. Tap seat not worn nor grooved nor nuffin.
Tap washer looks brand new, well it would only having been closed about 40 times in its life.:rolleyes:
Unless there was a speck of sumpen that has since gone but didn't leave a mark...
I have yet to test it under full mains pressure...

Still some good has happened. For once in my life I managed to beat the interest rate cut and am ahead of the game ISAs wise. :)
And closing a dormant Santander account was easy as can be compared to Barclays.
Funny times.

Dentist in the morning. :eek:
Sleep well folks!
:):):)
 
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