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Old 08-15-2012, 06:47 AM
soafone soafone is offline
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Can a pressure tank and pump start relay be wired to share a pump?

I have a job in the country with a well and pump in the well. Rather than tapping into the indoor plumbing after the pressure tank for the sprinkler system, could I not tap in between the pump and pressure tank and somehow wire the pump (in parallel?) so I may have a pump start relay control the pump?
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Old 08-15-2012, 06:58 AM
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why would you want to?
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Old 08-15-2012, 07:09 AM
soafone soafone is offline
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So the pump would remain constantly on rather than cycle on/off and the pressure would not fluctuate between 30/50 lbs.
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Old 08-15-2012, 07:17 AM
soafone soafone is offline
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Or could adjustments just be made at the tank's pressure switch to achieve the same result of the pump running constant for the sprinklers?
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Old 08-15-2012, 07:25 AM
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You need to match your zones to the pump out put
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Old 08-15-2012, 09:54 AM
soafone soafone is offline
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Quote:
Originally Posted by greenmonster304 View Post
You need to match your zones to the pump out put
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Yes, of course, but that has nothing to do with how the pump is started/stopped.
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Old 08-15-2012, 10:40 AM
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Quote:
Originally Posted by soafone View Post
Or could adjustments just be made at the tank's pressure switch to achieve the same result of the pump running constant for the sprinklers?
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It has everything to do with this post
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Old 08-15-2012, 10:47 AM
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You must find the steady-state output of the pump, and that means running it closer to 45-65 than 30-50
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Old 08-15-2012, 11:47 AM
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Quote:
Originally Posted by soafone View Post
I have a job in the country with a well and pump in the well. Rather than tapping into the indoor plumbing after the pressure tank for the sprinkler system, could I not tap in between the pump and pressure tank and somehow wire the pump (in parallel?) so I may have a pump start relay control the pump?
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Yes, I've done it several times.

http://www.wplawinc.com/LiteratureRe....aspx?ID=73160
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Old 08-15-2012, 12:18 PM
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Small problem with an outdoor tap in cold climates is the system shutoff valve has to be located below the frost level. Add the complications of a backflow preventer and a strainer, and the whole idea goes down the crapper.
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