Question about Flotec TC2151 P2 Well Pump Pressure Switch

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Changed pressure switch now pump cuts off and on @ every 15 secnds

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There are two adjusters, one for max pressure, one for the difference between cut in and cut out. If you have fussed with either of them, look on the old switch for an idea of where they belong.
Basically, the one on the big spring is tightened until the pump cuts off at the desired pressure, and the littler one is just tightened up until it is not loose.
Further adjustments have to be made in small increments, with the pump allowed to fully cycle up to the desired pressure. Then the pressure has to be released (let some water out) until the pump comes on.
Balancing between these two adjusters is not easy.
If you have totally messed up, get a new one and don't mess with it. It will be factory set to the settings on the box.
If the pump still won't stop running, you have something wrong with the plumbing, like a check valve that has failed.
The foot valve is the most likely suspect to fail. If there is no foot valve, there should be a check valve on the suction side of the pump.

Posted on Nov 28, 2013

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Low water pressure how do i increase the pressure


The water pressure is adjusted with the pressure switch, which turns the pump on and off. The pressure switch is typically set for a cut-in and cut-out pressure of 20-40 psi, or 30-50 psi. Usually there are adjustment directions on the inside of the switch cover. But, there are several other factors that may affect the house pressure. If there is a pressure tank that is pre-charged, the tank pressure may need to be reset, or the tank bladder may be ruptured. Have the entire system checked out.

Apr 21, 2014 | Utilitech 3/4-HP 15 GPM Shallow Well Jet...

1 Answer

Pressure switch always runs pump at 15 psi doesn't cut out


At 15psi... I'm not surprised that it doesn't shut off the pump. That's VERY low pressure. You may have a plumbing leak somewhere if it doesn't give you any more pressure than that... or you may have the wrong pump for that application.

Feb 23, 2014 | Plumbing

1 Answer

Porter Cable pancake rated at 150 PSI stops at 135 PSI. It has done this since it was new.


If it's pumping up to 135 psi, shutting off and then restarts at the same pressure point since it was new, the pressure switch may have been set low at the factory. I don't know which model you have but most pressure switches have directions inside their cover as to how to adjust the cut-out and cut-in pressures. Be careful doing this, overpressuring the tank is dangerous. There is an adjustment screw or bolt that changes the pressure on the switch spring. Some pressure switches have two screws, one for cut-in and one for cut-out pressure. A few have one that adjust both pressures. If you do adjust the cut-in/cut-out levels, do it slowly and cycle the motor a couple times between each adjustment to see where it turns off and on. If the compressor is doing what you want it to, only pumping to 135 psi, it will live longer than if you adjust it up to 150 psi. Those last 15 psi of air are hard to get and will mean the motor will be running longer and more heat will be building up in the head.

Oct 01, 2012 | Porter Cable Air Tools & Compressors

1 Answer

I had a water line bust. After fixing the leak, I lost water pressure. Someone tried to fix the problem and now we have little to no water flow. I have to pumps . The smaller pump that feeds the house is...


The nut on the larger spring in the pump pressure switch: Usually the larger nut in the pump pressure control switch adjusts the pump cut-on ("cut-in") AND pump cut-off pressures simultaneously. This is the left-hand spring (and nut) in our photo. That means that whatever the gap is between the cut-on pressure and the cut-off pressure, that gap is maintained, but the entire operating range of the pump is raised or lowered. Turning the large nut clockwise RAISES BOTH the cut-on and cut-off pressures. So turning the large nut clockwise shifts the whole operating pressure range of the pump UP to HIGHER pressures.
Conversely, turning the large nut counter-clockwise will lower the whole pump operating range. This is the simplest adjustment to make.
Photo (left) courtesy of a reader.
The nut atop the smaller spring in the pump pressure switch: this nut is used to narrow or widen the gap between the pump cut-on and pump cut-off pressures. This is the right-hand spring (and nut) in our photo).

Turning the small nut clockwise (tighter) will RAISE the CUT-OFF pressure, and vice versa, loosening or turning the nut counter-clockwise will lower the cut-off pressure. Watch out! If you loosen this nut too much you can set the cut-off pressure below the cut-on pressure and the pump will turn on and run forever (or until it burns up.)
Which nut to turn in the pump pressure switch control, and which direction to turn it, are usually visible on a label inside the pressure switch cover. Above we show photos of a common Square D water pump pressure control switch (Schneider Electric) and the label with pump control adjustment details. [Click to enlarge].
Here are Example Pump Pressure Switch Adjustment Instructions from Square -D Understanding how pump pressure control switches work and which way to turn which of the two nuts in the control can be confusing.
On a Square-D Pumptrol® 9013FSF-2 pump pressure switch, for example, Square D tells us that we
  • Turn the Range Nut #1 (the larger spring and nut) clockwise (to the right or "down") to raise [both] cut-on and cut-off pressures. This is "tightening the nut down" against the spring. ("Rightie-tightie, leftie-loosie" as Mara Gieseke says to her kids). Thanks to reader Rise for this clarification.

    In other words, adjusting the pressure on this spring shifts the whole operating range of the switch up or down, but keeps the difference between cut-in and cut-out the same, whatever it happens to be (typically it's about 20 psi from the factory.)

    If you want the pump to turn ON (cut-in) sooner
    , that is, at a higher water pressure, turn the nut clockwise or "tighter".

    If you want the water pump to turn ON (cut-in) later, that is, at a lower water pressure, turn the nut counterclockwise or "looser".

  • Turn the Differential Nut #2 (the smaller spring and nut) clockwise to raise the cut-out pressure.

    If you want the water pump to turn OFF (cut out or cut-off) at a higher water pressure, turn this nut clockwise or "tighter".

    If you want the water pump to turn OFF (cut out or cut-off) at a lower water pressure, turn this nut counter clockwise or "looser"

    Here is why the small nut is called the "Differential"
Keep reading at LINK

Nov 03, 2010 | Flotec TC2151 P2 Well Pump Pressure Switch

1 Answer

Silverado 2500 hd runs for about 5 miles then cuts off. after sitting for a while it will start and cut off again


Check the fuel pump pressure. When the pump gets worn the pressure drops too low and a low pressure switch cuts off the injector. When started after sitting for a while the pressure surge deactivates the switch for a while. Have you changed the fuel filter?

Jul 16, 2010 | 2002 Chevrolet Silverado 2500HD

1 Answer

Somthing is shutting my fuel pump down before the car cranks


Fuel pressure regulator may be bad,is normally located at the end of fuel rail.
let me know if this helps

May 14, 2010 | 1995 Ford Crown Victoria

1 Answer

Pump cycles like crazy!!


Sometimes a new tank the blatter will be kinda sealed to the sides of the tank.the amount of air in the tank s/b equal to the cut in pressure of the pressure switch.(40 lb) that would be (60 lb) cut out if you messed with the little screw on the pressure switch you have a problem.there must be the 20 psi of differance between start and stop.

May 13, 2010 | Flotec Corrosion Resistant Shallow Well...

2 Answers

Fuel pump shorting out will not start


Did you tape a fuel pressure gauge to the windshield,to see if your really loosing fuel, when it quits.
Did you consider the MAF sensor,TPS Sensor.
The pump won't run if it isn't needed. If the PCM doesn't see a crank signal or other data it needs,it won't keep the pump going.
You may be working on the symptom,not the cause.

May 12, 2010 | 1995 Ford Crown Victoria

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