pressure drop from well to house
#1
02-23-05, 09:04 AM
pressure drop from well to house
I have a 15 PSI pressure differential from my well to my upstairs showerhead. Here are the numbers
cuton/cutoff: 40-60
120 gal pressure tank (empty psi is 38)
13 PSI drop down
2 HP pressure pump.
Distance from well to showerhead is more than 100 yds.
Vertical rise from pump to whowerhead - 20 to 25 ft.
When I have a pressure gage on the showhead the pressure is high 20s to low 40s. High 20s provides a pretty dismal shower.
Questions:
With a 13 PSI drop down does this mean I can adjust the cuton PSI to 45?
Can I add a second pressure pump at the house?
Any advice is appreciated.
great site.
cuton/cutoff: 40-60
120 gal pressure tank (empty psi is 38)
13 PSI drop down
2 HP pressure pump.
Distance from well to showerhead is more than 100 yds.
Vertical rise from pump to whowerhead - 20 to 25 ft.
When I have a pressure gage on the showhead the pressure is high 20s to low 40s. High 20s provides a pretty dismal shower.
Questions:
With a 13 PSI drop down does this mean I can adjust the cuton PSI to 45?
Can I add a second pressure pump at the house?
Any advice is appreciated.
great site.
#2
02-23-05, 09:29 AM
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Hi Wellwisher, and welcome to DIY Forums,
-I'm a bit confused with the pump size etc. You quote a "Vertical rise from pump to whowerhead - 20 to 25 ft." and also " 2 HP pressure pump."
What is this 'pressure pump' , are you referring to the well pump ? If you are , 2hp is unusually large for a domestic well pump. Please describe the pump and give it's model #.
The conditions you describe depend very much on this, and on the type of piping you have, amount of elbows, Tees, valves etc.
Do it Right - Do it once.
-I'm a bit confused with the pump size etc. You quote a "Vertical rise from pump to whowerhead - 20 to 25 ft." and also " 2 HP pressure pump."
What is this 'pressure pump' , are you referring to the well pump ? If you are , 2hp is unusually large for a domestic well pump. Please describe the pump and give it's model #.
The conditions you describe depend very much on this, and on the type of piping you have, amount of elbows, Tees, valves etc.
Do it Right - Do it once.
#3
02-23-05, 11:15 AM
The rise i'm referring to is the vertical climb the water has to perform to get to the showerhead. The well is about 300 ft. from the house and about 10 ft. below the slab of the house. Add that to the 15 ft. to the second floor showerhead and it'a about 25 ft. above the pump.
The pressure pump is not the well pump. Actually, after checking on the internet here at work it would be a 2 HP F&W 'centrifigal pump.' Not sure on the exact model.
Piping is PVC to the house and then copper inside.
I'm pretty sure the psi drop is from the pump having to push the water up. I believe loss is just under 1/2 pound per foot.
Just looking for solution.
The pressure pump is not the well pump. Actually, after checking on the internet here at work it would be a 2 HP F&W 'centrifigal pump.' Not sure on the exact model.
Piping is PVC to the house and then copper inside.
I'm pretty sure the psi drop is from the pump having to push the water up. I believe loss is just under 1/2 pound per foot.
Just looking for solution.
#4
02-23-05, 11:46 AM
Vertical pressure PSI drop is just under 1/2 psi per foot of rise. So you will have a 10-15 psi loss pushing the water up 20-25 feet. There is nothing you can do about it except raise the pressure at the pump.
#5
02-23-05, 08:38 PM
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Hi WellWisher,
- ok, I get it now, -strange system . However ,the only pressure that matters in this case, is between the pressure tank and the shower. A 10-13 psi loss is normal. To compensate, either raise the tank pressure, and the pressure switch to a higher level , something like 45 -65, or get a low pressure shower head, ( I presume you have removed the restrictor in this shower head ?)
Do it Right - Do it once.
- ok, I get it now, -strange system . However ,the only pressure that matters in this case, is between the pressure tank and the shower. A 10-13 psi loss is normal. To compensate, either raise the tank pressure, and the pressure switch to a higher level , something like 45 -65, or get a low pressure shower head, ( I presume you have removed the restrictor in this shower head ?)
Do it Right - Do it once.
#6
02-25-05, 11:47 AM
I've pretty much maxed out the settings. I'm at 48-65, but my pump automatically shuts off at 63 PSI. Its an F&W model CJ101 B 201.
I'm thinking about putting a Davey booster pump at the house right before the water softener. My understanding is that they can keep the pressure at a constant 80 psi if i want it that high.
Any opinions or experiences out there?
http://www.aquascience.net/daveypump.htm
I'm thinking about putting a Davey booster pump at the house right before the water softener. My understanding is that they can keep the pressure at a constant 80 psi if i want it that high.
Any opinions or experiences out there?
http://www.aquascience.net/daveypump.htm
#8
02-25-05, 08:30 PM
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Hi WellWisher,
- putting a booster at 80 psi right before the softener will most likely cause serious damage in the softener, they're not built to operate that high !
Do it Right - Do it once.
- putting a booster at 80 psi right before the softener will most likely cause serious damage in the softener, they're not built to operate that high !
Do it Right - Do it once.
