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julieblades

Active Member

Posts: 8

Location: Barbados

1

Saturday, January 7th 2006, 6:27am

I need a sensor to stop overflow of tank and waste

When electronic float switches stick the refill water to the tank keeps on running and going out the overflow. As we do monthly maintenance at properties we may not see this so it could run up thousand dollar water bills. I need some sort of device in the overflow to either warn the owner or shut off the water and prevent waste. It is better to have a dry garden than a huge water bill. Any ideas? The overflow only really comes into play if we are experiencing really bad weather.
julieblades
Blades Irrigation Services
101 Durants Green
Christ Church
Barbados

Wet_Boots

Supreme Member

Posts: 4,087

Location: Metro NYC

2

Saturday, January 7th 2006, 12:30pm

How often do the float switches stick? Seems you could come up with something reliable. Maybe a redundant setup with more than one float switch per tank.

julieblades

Active Member

Posts: 8

Location: Barbados

3

Sunday, January 8th 2006, 4:55am

<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Wet_Boots</i>
<br />How often do the float switches stick? Seems you could come up with something reliable. Maybe a redundant setup with more than one float switch per tank.
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
We have taken on a large development of upscale houses. A lot of the equipment is really old and not trustworthy. I am slowly replacing obsolete toilet tank type equipmentin the tanks with electronic floats and solenoids. We seem to have been sent a batch of float switches that are not too reliable but it is hard to tell which ones they are so I am looking for a fail safe method where I have a back up switch of some sort. Water is very expensive here so wastage is not an option. Thank you for your input.
Blades Irrigation Services
101 Durants Green
Christ Church
Barbados

Wet_Boots

Supreme Member

Posts: 4,087

Location: Metro NYC

4

Monday, January 9th 2006, 1:30am

If you have an overflow pipe, you can send the flow into another small tank, with its own (different kind, of course) float switch, and give the small tank an overflow into another tank/switch. Be as redundant as you wish, and certainly, inform the manufacturer of the problem float switches that their poor product is costing you big money.

julieblades

Active Member

Posts: 8

Location: Barbados

5

Tuesday, January 10th 2006, 1:22am

Thank you for you input Wet Boots. After some research I have decided to try out a mercury float and put a Y strainer upstream of everything to prevent any little rocks from sticking the solenoid open. Our public water company here is a little slack on repairs and rocks are often found in pipes after they have been fixing leaks. Have you had any experience with mercury float switches? I am told that they are very reliable.
Blades Irrigation Services
101 Durants Green
Christ Church
Barbados

Wet_Boots

Supreme Member

Posts: 4,087

Location: Metro NYC

6

Tuesday, January 10th 2006, 9:35pm

Mercury switches have been around for a very long time. As for strainers, if the water is going to feed any solenoid valves, you want at least 80 mesh straining. A standard Y strainer will probably have a 20 mesh screen. Of course, the strainers become another maintenance item, depending on how much debris they trap.

Mudpuppy

Starting Member

Posts: 1

Location: USA

7

Thursday, October 12th 2006, 6:03pm

Grainger sells a float switch I have used for pond applications. Runs around $14 from their catalog. I think they have online purchasing and shipping. This float operates a micro switch. It can be set to open or close depending on the orientation of the float. The switches base is 1/2" pipe thread with wires extending out through the threads.
Over Educated
Overpriced
Glorified Ditch digger!
but still a bargain
and I never say "I told you so"

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