shallow well pump cut off cut on

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edenjohnny

Registered User
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Hi, I have a brand new pump and vessel installed . It worked at 45psi to start, now only max.25psi. I have to afdmit I have fiddled with the cut on/off screws. It now either stays on or off depending wether I touch the contacts,(I hope that makes sense) Also does anyone know the pressure is supposed to be in the bladder vessel? When the pressure is at 0psi, the vessel registers 0psi. thanks
 
First things first, make sure your header tank is full and there are no taps on when setting the switch and pressure. You can close the outlet from the storage tank but trapped air may give a false reading.

The suggested charge for the vessel should be written on it - my guess around 18 psi. If you have pressed it at all and let air out you must use a proper pump with gauge to check it and recharge it.

If you have messed with the screws you will just have to keep at them to try and get it back up to pressure. You need to set the one that lets it run for longer to build up the pressure.

For shallow well pumps it is advisable to get an auto switchoff switch that will turn off the pump where the vessel drops below 1 bar and needs to be manually reset - this stops dry running.
 
thanks davidco, I have no shut off valve from the tank. Should I have a foot valve anywhere in the system to the house? I have none either, only at the bottom of the well with the filter. What happens if i have too much air pressure in the tank. Also is the pressure measured when there is no water if so it reads 0psi on my tyre oressure guage. Am I being thick?
 
You must have a shut off valve somewhere even on the house side to shut off the supply!
Yeah, with no water in the vessel it must read 18 psi with your gauge. Sort that out first, you may have busted the vessel by not ensuring it was primed (usually comes primed but you never know). With no air in the bladder the pressure from the pump can destroy it.

Foot valve only at the bottom of well.

You know that you have to open the top of the pump and fill it with water before you fire it off - that's priming the pump and not to be confused with priming the pressure vessel.

First thing you need to do is that the switch back to the right settings, on at .8 bar and off at 2.5 (or thereabouts). Get your screwdriver back out and keep at it or just go back into the shop and have a look at how one looks new out of the box so you'll have an idea where the screws should be.
 
dAVIDCO, THANKS FOR THAT i can get the pressure up to 24 psibut no higher no matter how long the pump runs. The press=ure in the house is ok with that. so i turn the screw down till it stops,/trips then after a while the pressure switch does not come on again. Should I call an expert?
 
edenjohnny said:
dAVIDCO, THANKS FOR THAT i can get the pressure up to 24 psibut no higher no matter how long the pump runs.
Click to expand...

I wonder is your pump up to the job. How deep is the well and what HP pump are you using? Remember your pump has to pull the water up and push it into the pressure vessel.

Might be cheaper for you to take off the blackbox switch go back to the shop and reset it by looking at a switch on a pump in the shop. PS does your switch have a manual and auto flick switch on the side?
 
Hello again. I am only lifting 4feet up put pushing about 150 metres to the house on a very slight incline,( about 2/3 metres) the motor is 1/2 hp i think. I just checked the tank pressure again, and it reads 0 psi, when the tank pump is not running, Should I pump up the tank bladder then to approx 18 psi when empty?
 
edenjohnny said:
Hello again. I am only lifting 4feet up put pushing about 150 metres to the house on a very slight incline,( about 2/3 metres) the motor is 1/2 hp i think. I just checked the tank pressure again, and it reads 0 psi, when the tank pump is not running, Should I pump up the tank bladder then to approx 18 psi when empty?
Click to expand...

Yes, the charge should be written on the pressure tank but 18 psi (1.5b)should be fine. Once you get that sorted, hopefully everthing else will fall into place.

150 metres sounds like a long way for 1/2 hp, it might be worth while getting a shut off valve for somewhere near the pump and see if that lets the pump fill the vessel and shut off automatically.

Also just an idea you need a check valve (to stop water flowing back down the pipe) on most surface pumps, do you have one but I don't know how much of an issue it is with only a 4ft lift.
 
Hi daviidoco,, many thanks for your patience. Have pumped the bladder, things seem to be getting better, just needs fine tuning of the on/off sequence , will let you know how things are progressing. SHE sasys it was working fine why fiddle. It was running too lonbg and not shutting off,. I.ll let you tell her o.k.
 
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