🔧 Square FSG2J21M4CP Standard Pressure Switch: Robust Performance & Precise Control Review

It worked well for three years after I learned how to adjust the reservoir air pressure. You need to set the air pressure slightly lower than the cut-off pressure. Otherwise, the pressure will suddenly drop too much and the pump switch will be blocked. I've read instructions for these sealed air tanks that say you should use the same tank pressure as the cutoff pressure. However, this does not allow for any tolerance for such a switch. The cut-off pressure should be slightly higher than the air

Great product for an irrigation pump IF you set it up correctly. I replaced the Square D, which had become boring after 15 years. I thought it was just a newer model, and it is, but the feature that pissed me off so much was the safety feature. You know you've got it when it has a stainless steel lever. The model also bears the designation M4. You can buy a brand new switch with no security function. The safety feature will shut off the pump completely if the pressure drops 10psi below the set…

I've been using Square D pressure switches for years. They have always been very reliable and their range is easy to set. The Shallow Well jet pump takes water straight out of you 300 gallon water reservoir that is constantly topped up with city water I'm sure there will always be a steady supply of water for the pump but just in case a pipe breaks or something else interferes with the suction/suction side of the For the pump I use a Square D relay with low pressure cut off to protect the pump…