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eric
Since 13 Jan 2006
1867 Posts
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 Mon Apr 26, 10 11:42 pm WAY OT: Low Water Level Submersible Pump Cut-off Switch |
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I need an inexpensive, yet reliable float switch that will cut off a submersible pump when the water level is too low. The water tank--pilla--is 1000L and the water is "fresh," but pretty damn salty--La Ventana. Really amazingly salty, actually. The pump is a 3/4HP 220V submersible. Currently the pump is set up to pressurize a tank, and cuts off when the tank is at 25 psi, or so. What I don't have is an automatic cut--off for a low water situation where the pump sucks the pilla dry and fries. The switch needs to remain off until the user can check the water level and reset the switch--otherwise the pump would cycle on and off right at the low water level.
Suggestions?
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pump.jpg |
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PDXF
Since 10 Sep 2008
116 Posts
Stoked
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| Tue Apr 27, 10 6:07 am |
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| Uhm, how about a sump level switch? It doesn't latch off like you wanted it to though.
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eric
Since 13 Jan 2006
1867 Posts
XTreme Poster
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| Tue Apr 27, 10 6:38 am |
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| Yeah, the "Off" is important, otherwise it keeps cyling--like a sump is supposed to do, but not a well pump.
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Scribble
Since 18 Nov 2005
636 Posts
NoPo
Addicted
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| Tue Apr 27, 10 7:15 am |
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My suggestion would be to call the guys at United Pipe and Supply in Tigard. I used to work with these guys on a regular basis and they were very helpful.
United Pipe & Supply Inc
www.unitedpipe.com
14830 Southwest 72nd Avenue
Tigard, OR 97224-7964
(503) 639-7473
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Aeolus
Since 20 Apr 2010
354 Posts
Gold Beach, OR
OR-SoCo-Aficionado
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| Tue Apr 27, 10 7:15 am Little Giant Float Switch |
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You can use a float switch, if you have room in the tank for the thing to swing and you can easily access the tank. Instead of wiring it "piggyback" through the pump at the tank, you'll have to bring the switch wire into the pump house and wire it in before the pressure switch.
Little Giant RFSN-10, 115/230V, 1/2-1 HP - Piggyback Remote (wide Angle) Float Switch, 25' Power Cord (599119)
Sent PM with pdf and photo
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forrest
Since 21 Jun 2005
4330 Posts
Hood River
Hick
CGKA Member
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| Tue Apr 27, 10 8:20 am |
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| Did you drill a well under your house? Hood River water is expensive, maybe I should do that too!
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pdxmonkeyboy
Since 16 May 2006
6081 Posts
forever labled as the
retired kiter & motorhead Unicorn Master
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| Tue Apr 27, 10 9:20 am |
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| Forrest wrote: | | Did you drill a well under your house? Hood River water is expensive, maybe I should do that too! |
You should take a gander at the City of Portland water bills some time. Man oh man is that big pipe project EXPENSIVE!!! Now some folks want the city to treat bull run water for cryptosporidium. Good thing that the estimates for a filtration system are only at 385 million. 
But back to the question at hand.. I have a friend in with a low volume well and he uses something very similar to this....http://www.deanbennett.com/pumptec-well-protection.htm
The switch above has a adjustable recycle time so you could adjust it based on the rates of infiltration of your well and water usage. The longest setting was I believe 4 hours and that would give you more than enough rest time to avoid rapid pump cycling and burn out. Or it has a permanent off feature. The nice feature of that switch is that it is triggered by load amounts to the pump and not the water level which is really the issue your trying to address anyways.
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eric
Since 13 Jan 2006
1867 Posts
XTreme Poster
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| Tue Apr 27, 10 9:40 am |
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<<The nice feature of that switch is that it is triggered by load amounts to the pump and not the water level which is really the issue your trying to address anyways.
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Yep-this looks like a possible winner.
THX!
Eric
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