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45 of 49 people found the following review helpful
on May 31, 2011
This a great product that I use on my vacation home's water well. The low-pressure cutoff feature is important for me since I'm not always there (and has saved the pump and the home once when water was pouring into the crawlspace from a broken supply pipe). But I recently replaced the switch after many years and found the documentation has some shortcomings. Then I found it is hard to find a way to reach technical support at this very large manufacturer's website. However, once I did find and send a webmail, I got a prompt, detailed reply, and another quick reply to a followup question.

Their general webmail address is ContactUs_Web@us.schneider-electric.com, but I think the most direct way to reach them for technical support at control.support@us.schneider-electric.com.

What I learned by email is the following: "The low presssure cut off is 10 psi below the cut in pressure. No matter the pressure setting of the device, or even if you change the pressure in the field." I also learned "You can adjust the pressure anywhere in the range, cut in 5 to 45 psi and cut out 20 to 65." I had initially purchased a 30-50psi switch (FSG2J21M4) and realized the previous owner had left the pressure tank at its factory setting of 38psi, which is perfect for a 40-60psi switch, but I had to bleed it to use with my 30-50psi switch. I didn't know if I could just adjust the 30-50psi switch or needed to get a 40-60psi unit. It turns out happily to be the former, though I will need to drain the tank and repressurize it to 38psi when I adjust the switch to a higher range.

BTW, I learned by installing a pressure gauge (Flotec TC2104-P2) on the line next to the switch that if your pressure tank is pressurized higher than the cut-in pressure, as the pressure drops during use, there is a sudden drop of pressure when the tank pressure is reached, down to the cut-in pressure. What I think is happening is the pressure tank is suddenly pushing water back down the line toward the well until the pump comes on. This phenomenon disappears when the tank or the switch is adjusted so the tank pressure is the recommended 2psi lower than the cut-in pressure.
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11 of 11 people found the following review helpful
on August 6, 2011
Verified Purchase
Installed for remote cabin shallow pump.
Feels like a tank. Works like a clock.
Switch has separate adjustments for average pressure and hysteresis. Pretty massive contacts (see my picture). Tweak it to 30 to 50 PSI. So far no problem.
review image review image
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12 of 13 people found the following review helpful
on February 12, 2009
Verified Purchase
Great switch. If your line loses too much pressure, pump shuts off automatically. Otherwise with a broken pipe a pump could empty your water tank, then burn out your water pump. I've used this switch before. It is well built with the a lot bang for the buck.
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7 of 7 people found the following review helpful
on December 15, 2010
Verified Purchase
Cons:

Would have worked for one whole year if it lasted one more day. One of the contact pairs actually fell(?) off into the mechanism. I hope it hasn't burnt out anything else.

The switch was in an enclosed water pump shed but showed signs of internal corrosion.

Pros:

It was nice that you could lift the low pressure reset switch up to a point it would latch off, without having to go back and forth to the circuit breaker box when doing minor maintanance. Remember, the power to the switch is still on and do not do electrical or "wet" work in this condition!

Let the low pressure reset switch snap down when done. If pressure was not lost, pumping resumes.

To restore pressure, lift the switch long enough to build up pressure, but release before you over-pressurize and blow out the water heater or other products!

Other thoughts:

Works well if the low pressure condition it was designed for occurs.

Will buy again for the low pressure cutoff, but will get two - for emergency replacement when snowed in like now, and monitor it for corrosion!
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8 of 8 people found the following review helpful
on October 9, 2008
Verified Purchase
Works great, Installed easily. It has already been successful in shutting off my pump after an open pipe drained my system of water pressure.

It was a bit time consuming re-pressurizing my system but a lot better than replacing a pump.
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7 of 7 people found the following review helpful
on September 16, 2010
Verified Purchase
This is a replacement. I wouldn't have anything but this switch. If there are any problems with our sprinkler system that causes more water to be used than our pump will supply, the pressure goes below 30 PSI and the switch shuts the pump off until it is manually reset and we know we have to find our problem. This switch is also good for a low producing well. When more water is drawn than the well produces, the pump is shut off.
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5 of 5 people found the following review helpful
on November 11, 2012
Verified Purchase
This low pressure cut off switch solved a problem we had at a remote pump. The pump at times due to agricultural pumping in the area would lose its prime causing it to run for a long period of time before being discovered. This switch shuts the pump off and saves it from damage.
The down side is that water usage at this site sometimes exceeded the pump output for a short time. This caused a temporary low pressure condition that also shut the pump off. To compensate, I restricted the output from the pump somewhat and everything is fine. This switch has most likely saved our pump.
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4 of 4 people found the following review helpful
on April 27, 2011
If you need to use this on an agriculture water well, get the version WITHOUT low pressure cut off (looking at my spare one its marked SQ-D 9013FSG2J20). Also this version is MORE prone to problems in near freezing weather, also if you must field adjust PSI this device has multiple springs and is a bear to keep in the working range.
There are other ways to protect against leak issues, This causes more problems than it solves. As someone pointed out the contacts only last around 12-18 months. So buy many, and use a open prong wire ends to aid in fast replacement. They are rumored make a version with more robust contacts, still looking for it!
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2 of 2 people found the following review helpful
Verified Purchase
I have been using this product and its predecessors for over 40 years. It does its job reliably. Use pennyroyal oil occasionally on the feeder pipe to discourage ants. They cause arcing of the contacts, sometimes causing unreliable connections and arcing damage to the contacts.

Use non-flammable insulation for freeze protection, since arcing can ignite rags.

The low-pressure cutout also replaces my earlier $200+ Warrick sensors to prevent pump burnout when there's no water to pump. It has saved my pump several times.
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1 of 1 people found the following review helpful
on March 23, 2014
Verified Purchase
Square D is a good choice, I just put it in and forget it once it is set up. This is the Low Pressure Cutoff model and that is the safe way to go . I have used both models but the low pressure cut off cuts off the power to the well pump if pressure drops much below about 40 lbs psi You have to go to the well (And that could be a pain in the winter in the snow and freezing weather when the power goes out and it needs to be reset) but if you don't have the low cut off and your well runs dry, You could burn up your well pump so this is the best choice in my opinion.
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