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calculating water pressure  RSS feed

 
bob mctaggart
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Hey permies,

I have a yurt off the grid on a mountain, and I'm wondering what the formula is for calculating psi based on drop.

In other words, how far up the mountain do I need to put my rainwater collector to get normal tap pressure in my yurt?

Thanks!
 
John Elliott
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One atmosphere = 14.7 psi = 33 ft. of hydraulic head.

Most household service is around 50 psi; if it's much less residents complain of low pressure, if it's much more, it's hard on the plumbing. A lot of the old water tanks up on stilts which were fed by a windmill pump were about 60' off the ground, giving in the neighborhood of 30 psi, which was adequate for a frontier home. If they had some topography and could put the tank up on a hill, that really improved the water pressure.
 
bob mctaggart
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Thanks John, so am I correct in my understanding that 66 ft. of head would produce a reasonable amount of pressure?
 
allen lumley
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Location: Northern New York Zone4-5 the OUTER 'RONDACs percip 36''
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Bob McT : People on municipal water living on the hills above Pittsburg and Three Rivers Stadium would be happy to have that much pressure ! Do not forget to
allow for some pressure losses due to friction loses within the pipes, you can always boost your flow by storing water in 55 gal drums at your house site and
running a low volt RV pump off of a car battery ! for the Crafts ! Big AL
 
Brian Knight
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Tubing/piping size, number and type of fittings are big variables as well.
 
Troy Rhodes
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20-25 psi and 3/4" piping right up to the appliance/device/faucet would give surprisingly good service.

Some appliances are sensitive to low pressure, but for showers and faucets, this would work fine.
 
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