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  #1  
Old 05-30-2012, 01:49 PM
country kid country kid is offline
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Well pump irrigation psi/flow question

I would like to up the pressure at a well job that we just installed.

Details are as follows
5-6 heads per zone. 7 zones - All RB5004 rotors.
3/4" poly split with 1".

Each zone is matched to 14 gpm with nozzles. This keeps the pump from cycling.
At the pressure tank, the psi gauge holds at 57 psi without cycling.

If i nozzle the zones to 12gm, the pump will cycle every 3 minutes because it climbs to 60 psi because the cutoff is set to 60/40

My question is.
Can I up the cutout pressure on the pressure switch to stop at 70 or 75psi
, then nozzle the zones to be 12gpm and making the gauge hold at 66 or something?
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  #2  
Old 05-30-2012, 03:25 PM
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Wet_Boots Wet_Boots is offline
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Just raise the cutoff to 70 psi and work from there - 70 psi used to be the max, based on range of adjustibility of switches, and the old standard of 75 psi tank ratings (with 5 psi safety margin, in case the pressure gauge was inaccurate)
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Old 05-30-2012, 03:36 PM
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Mike Leary Mike Leary is offline
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Quote:
Originally Posted by Wet_Boots View Post
in case the pressure gauge was inaccurate)
It's amazing how many pump houses I've walked into where the gauge was defective. I finally goaded my pump guys to install glycerin-filled gauges.
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Old 05-30-2012, 04:08 PM
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Wet_Boots Wet_Boots is offline
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I would give my own brand-new gauges about 5 psi leeway, just based on the usual gauge specs.

Also, note this specific advice is based on the existing cutout being 60 psi - raising the cutoff pressure without first draining the tank and raising its air charge is piker-ish, but a 10 psi bump is okay - a big increase in cutoff pressure should always be prefaced by adding to the air charge
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Old 05-30-2012, 04:20 PM
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DanaMac DanaMac is online now
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I've had some 100 and 150 psi gauges, that when spiked over their top end, were never the same again. I now try to get 200 psi gauges, since we have city water pressures exceeding 150 psi quite often.
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Old 05-30-2012, 04:35 PM
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Wet_Boots Wet_Boots is offline
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I think I've installed some 300 psi gauges.
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Old 05-30-2012, 04:50 PM
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Mike Leary Mike Leary is offline
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griswoldwatersystems.com/pdf/GWS-1014.pdf
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  #8  
Old 05-30-2012, 04:55 PM
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Wet_Boots Wet_Boots is offline
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I was always a US Gauge buyer, in part because I would need their 30 psi gauge to replace the frozen ones in the Toro flow&pressure gauge set.
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Old 05-30-2012, 06:50 PM
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Felco #2 Felco #2 is offline
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Is the well for irrigation only? If so, another option may be a smaller tank.
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  #10  
Old 05-30-2012, 07:05 PM
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greenmonster304 greenmonster304 is online now
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Quote:
Originally Posted by Felco #2 View Post
Is the well for irrigation only? If so, another option may be a smaller tank.
Why? That would make it cycle more often.
Posted via Mobile Device
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