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Mastercraft 3/4hp shallow well jet pump keeps cycling on and off for about 3 seconds at a time until up to pressure. How do I adjust? Also, pressure gauge not working. Could this be the problem

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The gauge is there to help troubleshoot problems. It does not regulate anything. It sounds like your press tank is bad. Take a tire press gauge and test the tank pressure at the schrader at the top of tank. If there is no pressure, you need a new tank.

If you do change the tank, I suggest you change the press switch and the gauge as well.

Posted on Mar 20, 2017

Testimonial: "Thanks. Basically the same thing the Canadian Tire Plumbing guy told me. However, rather than changing the tank, I have pumped up the bladder to 18psi witht he pressure off the tank. This helped but its getting bad again. There must be a slow leak in the bladder. Time to replace."

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Posted on Jan 02, 2017

  • 104 Answers

SOURCE: Flotec Shallow Well Jet Pump won't pump water

The tank is an air tank, it works like a cushon and accumulator.

Have you reconnceted the pump? If not fill the pipe that goes to the well with water. It should not drain down, there should be a foot valve that prevents the water from running back into the well. So if the foot valve is working it should not take a lot of water to do this.

Pour water into the suction side of the pump until the pump is as full as you can get it, reconnect the pump and start it up. Yes it does need to be primed

Good luck

Posted on Mar 17, 2009

  • 1 Answer

SOURCE: pump is not working, pressure gauge and pressure switch have been replaced.

the automatic pressure switch does restart the water pump when the valave is open?

Posted on Jul 08, 2009

  • 8404 Answers

SOURCE: why wont my Jet pump shut off?

Is the little pipe that connects to the pressure switch clear?

I suggest you remove it and blow through it to make sure it is clear. If the pressure is getting to the switch, it has to shut off ... your switch should be set around 30/50 (on at 30 - off at 50)

Posted on May 15, 2010

co7196
  • 3433 Answers

SOURCE: water pump keeps on running my mastercraft jet

yOU NEED A FLOAT SWItch to have the pump work unattended. I have two new switches and no use for them, Where are you?

Posted on May 26, 2010

agent91
  • 2100 Answers

SOURCE: 1/3 hp shallow well jet pump (mastercraft brand).

I don't think the power shortage had anything to do with the pump, I think it is the impeller or a gasket, or both. It is hard to say, a pump like that should **** dry and pull water right in.If you put your hand over the end of the pipe, it should make a mark like an octopus on your hand. I would take off the impeller, look for trouble, and replace 3 or 4 parts in there , you should have water. Hope this helps.

Posted on Sep 24, 2010

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1 Answer

When H2O runs pump keeps cycling every 15 to 20 sec. H2O drops to 30psi and pump stays on until 60psi. Then a couple of seconds does again until H2O is shut off. Pump runs for around 30 seconds.


If you've got the water turned all the way on, it sounds like your setup is operating normal. If the pump where turning of and on say every 5 seconds or so I would say to check the air pressure in the water holding tank that it's at the correct pressure.

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Can the pressure switch on the Utilitech 1hp convertible shallow well pump be changed from 20/40 to 30/50?


Yes, if the plumbing can handle the extra pressure. There should be a nut in the middle of a large spring inside the pressure switch. Turn that nut clockwise to increase the pressure. You may need to run some water to keep the pump cycling while you do this.

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I have a utilitech convertable pump. It is used as a shallow well pump at the moment. It worked fine untill last week, the hot water tank went bad and we replaced the tank and all the above ground lines....


Hi mid_age_elf
Your problem is that your "water bound"...
Your water tank must have a cushion of air for the pressure switch to work properly.
Turn off your pump and drain about 1/3 of the water from your tank.
Once you have an "air cushion" the pump and switch will work properly.
You can also add air pressure using an air compressor and an air valve installed on the top of your water tank or maybe on the side or bottom of the tank.
You would put air into the tank until about 1/3 of the water is gone replaced with the air.
Once that is complete your problem will be solved.
Please take time to rate me
Bud

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1 Answer

I have a 3/4 hp shallow well pump. It running at about ten on my pressure gauge. That means no pressure. What can I do?


If the pump turns on and off real fast, then your pressure tank is water logged. If you have
a pressure tank with a diaphram in it, you need a new tank. If it's a plain tank, then you
need to turn off the pump, drain the tank and turn it on again. All pressure tanks need
a cushion of air on top.

If the pump isn't short cycling, then try adjusting the pressure switch. There are two springs
under the cover, with adjusting nuts on them. One is for the cut in, the other is for the cut out.
I would set it so the pump turns on when the pressure drops to 30, then turns off when it hits 50.

Hope this helps ya !

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1/3 hp shallow well jet pump (mastercraft brand). After power outage i have been having problems with pump. It will run continuously without building up enough pressure to cut out. It wil build up to about...


I don't think the power shortage had anything to do with the pump, I think it is the impeller or a gasket, or both. It is hard to say, a pump like that should **** dry and pull water right in.If you put your hand over the end of the pipe, it should make a mark like an octopus on your hand. I would take off the impeller, look for trouble, and replace 3 or 4 parts in there , you should have water. Hope this helps.

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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.

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Make sure the foot valve in the well is good and the ejecter is cause I have replaced some with a pin hole in them or a rock get in foot valve and not let it hold pressure right.

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The pressure tank must have a certain amount of air in it so pump doesn't cycle as you say. The new pressure tanks have a bladder that separates air from water and keeps the pump from cycling so much. Make sure your pressure switch on the pump is OK--ie doesn't have burned contacts!

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