GamaTech 110V/220V 10A/5A Pressure Switch for Water Pump and Air Pump, Digital Adjustable Pressure Controller, 0-230 Psi

I ordered this $59 replacement to the generic mechanical pressure switches available at Menard’s, Home Depot, Lowes, etc. made by Square D & Merrill that sell for $18 - $25. I installed this device less than a week ago, and it has been easy to set and let run with my 2-wire 230v 0.5HP submersible pump set at 85 ft. I liked the stated separate, easily adjustable cut-in and cut-out pressure set points, and corresponds well to my fluid-dampened bourdon tube pressure gauge. It starts and turns off my pump like clockwork on each setting. I’ve noticed some reviews stating they saw a delay in shut-off, which can be programmed as well, but I chose to leave that at default. I woke up at 4:30 am 2 days after installation with no water when flushing the toilet. I checked the pump room and found an error code displayed on the controller, no pressure on the analog backup gauge, and immediately wondered WTF. To cancel the error code, you simply push any of the 4 adjust buttons and in my case, my pump started running like normal up to my programmed 65 psi cutoff (40-65 psi set). What happened next was interesting. As soon as the pump kicked out, my 80 gallon pressure tank blew down from 65 to 40 psi in about 10 seconds, indicating massive abnormal flow somewhere. I watched the pump and tank cycle the same way again and shut off by the switch safety algorithm while I had eyes on it. I checked all the house and outdoor spigots, no leaks or bursts, nothing running. My supply piping has 2 check valves, one at the discharge outlet on the pump, and one in our pump room just upstream of the geothermal tee. Our geothermal pump & dump system was running at the time, and has a fixed 5 gallon/min flow restrictor in the system. I turned the thermostat to OFF and the abnormal blowdown immediately stopped. Bottom line - this safety feature in this switch saved our ass within two days of being installed. No doubt our submersible pump would have pumped dry and burnt up if we had our old mechanical switch on it. It turns out normal geothermal operation the storage tank allows operations in the tens of minutes before the pump cycles on. A new 5 gal/min fixed orifice flow restrictor is on order for and yes it’s balls hot outside 29 July - 1 Aug 2024. Notes: For 220V wiring, you have 2 bundles one for power (inlet) and another identical marked outlet (for your pump). The yellow/green wire is for your ground. The other 2 wires, white and black, are for your hot wires (included brief user manual included actually states this). So a normal 3 wire 220V cable has red & black hot wires and a white for neutral/ground. If you get confused, read the documentation. The control wires white & black are switched on and off while the green/yellow is not. Well worth the money!

Ants kept getting into my mechanical pressure switch for my well. After replacing it several times I went on the search for a sealed digital one like this. Not only was it easy to install and set but it's sealed so no way any intruders can destroy it. So far it's working better than expected!

The manual lists a few error codes and how do deal and resolve them. But one error code is shows up, shutting down the switch and it is not listed on the manual.

Ill start with the good, the adjustability of this pressure switch is unmatched and it works great! Being able to adjust pressure with such precision and the ability to add a time delay are things a mechanical 30/50 or 40/60 switch could never do. In my installation with a 75' submersible 1HP Pump that imo was cycling too often. This was able to get my cycle times and pressure perfect! Now the bad (it's pretty bad) Although it is listed as being able to handle 1.1kw / (10 amps @ 120v or 5 amps at 240v). It's gauge of wire and PCB Mounted relay are not up to the task of in my case almost 30amps! (5.5a-6.1a running/1.3kw-1.4kw) of inrush current that is 7.2kw! The PCB mounted relay will be melted in a couple weeks. So to solve this issue, build a relay box! 30a/240v x2 Realys or a DPST Contactor (SPST for 120v) and let the relays handle the current of starting the pump, not the pressure switch unless you're running a 1/4hp pump (in which case this is definitely up to the task). This added complexity to my install BUT you NEED a junction box anyway so adding a couple relays is easy and this switch will last a LIFETIME in my setup as there is no load being carried by the pump!

Well.....i bought this a while back (March 22025) and it sat in the box in the garage. Finally got ready for it, wired it in, put 120VAC to it,,,,,and nothing. No lights no errors nothing. Thankfully I still had the old mechanical switch on. Update….I can’t find any sort of technical support for these. I did note that if I tapped on the unit with a screwdriver the lights would flash. Which only verified that there is power on the unit. But it still doesn’t work. Maybe I just bought a dud but beware…

Fantastic product. I had to replace my old pressure switch (original, so you know it wasn't great) Combined this with the "Star Pressure Fitting Kit" to make for a seamless and swift installation. Now I can see the water pressure and it really makes a difference in helping keep a stable pressure.

I have been struggling to find a well pump switch for the past two years. I started with Chinese manufactured ones, but the contacts arc, and just burn up. I then tried Merrill brand and those last a little longer (5 months), but the same thing happens. I measured the draw at 4 amps, but with the peak hold, for a fraction of a second can hit 11amps at startup, so I decided to bite the bullet and buy this Gamatech 7.5amp electronic switch, and it’s been the best decision I ever made, its reliable with no contacts to cause arching, absolutely accurate, and is completely reliable. I hope this helps others that too have had this issue. Yes they cost more, but it is worth every penny. I run my well at 60-80psi and it is now perfect. Unfortunately this did not come up easily when I searched before, and it wasn’t until I searched for electronic pressure switch, did I find it. Due to the issues I have had, I also paid the $10 for the insurance, I have only had it running for a month, so only time will tell, but I suspect it will last along time.

Just wired up so far so good. No wiring instructions but contacted them and they sent details on how it is supposed to be wired up right away. Really straightforward once confirmed with them how to wire.

Was an easy install and has been in more than a month now with no issues. Fixed my pressure problem and brought me into the digital age! 🤣

Looks great installed easy. I cannot get it to shut off water pump Using a relay because water pump draws 9.8 AMPs using 240 volts Found customer service member but not the correct company Contacted Amazon and sent help message to company Hope this unit will work

I looked around for a pressure switch for my well pump and this is the best bang for your buck. Easy to hook up. 120 or 240v. just set the desired pressure high and low and watch it do its thang. :)

Really cool switch. However, it comes about 5 psi off right out of the box. The instructions for calibration instruct you to calibrate it when there is no pressure. Which is only possible if you install another switch out to the well pump, or else the pump will kick on, which means you have pressure. (Since the pressure switch itself needs power to calibrate it)

So easy to install and amazingly simple to adjust cut in/out pressures. Highly recommend!