Bore - hole Well issue

oxjkqg

Hi,

I have a borehole well sunk in 2010 at 230 feet deep, hit a serious flow of water and was supplying all needs to 100 cow herd, parlour, wash vehicles etc. A small bit of an iron issue but nothing than a normal borehole.

Problem has arose lately, the pump is inclined to pump great pressure for a short period and then loose pressure and the regain pressure and keeps going like that. have changed the pump, serviced it etc, have tried the shock treatments to relieve and iron issues, have used sulphuric acid, problem still exists. Has anyone any suggestions on what to do?

blackbox

I get a similar problem from time to time. Yours may be different, but mine is caused by a build up of sediment inside the pressure switch.

Disconnect electricity, unscrew pressure switch from pipe and clean the small hole with a cocktail stick. Don't use a metal pin that could pierce the diaphragm.

.

oxjkqg

Have changed out the pressure switch all together and it didnt seem to do much for it..

longgonesilver

Can you see this at a tap or hose, a short pulse lasting just a few seconds at most?

Muckit

Would pulling the pump up a bit would it help?

Ten Pin

If there's an expansion vessel on the pump, the air bag inside it could be leaking.

oxjkqg

longgonesilver wrote: »

Can you see this at a tap or hose, a short pulse lasting just a few seconds at most?

Yes it will die down to a low pressure for a short interval and then pick up again., correct.

oxjkqg

Ten Pin wrote: »

If there's an expansion vessel on the pump, the air bag inside it could be leaking.

I suppose the only way to check that could be to do a pressure test on the vessel.

longgonesilver

oxjkqg wrote: »

Yes it will die down to a low pressure for a short interval and then pick up again., correct.

Turn off the pump, drain the expansion vessel by opening a tap, when empty check pressure in air valve on expansion vessel.

Do you know what it should be?

blackbox

oxjkqg wrote: »

Have changed out the pressure switch all together and it didnt seem to do much for it..

Well, if you've replaced it with a brand new one, the problem must be somewhere else. As advised above, check the pressure vessel.

tanko

I had a problem like that with a shallow well recently. The foot valve down in the water wasnt working properly.
Once it was replaced, all was ok. Is there a foot valve in yours?

Water John

There would be a non return valve under the pump.

I says

More than likely air bag is gone or going had similar problem here and had to replace the pump altogether

foxy farmer

Some submersible pumps have a check/nonreturn valve fitted internally. More don't. Some are fitted on top of the pump or maybe on top of the borehole. To check if this working correctly switch off pump open a tap to discharge the pressure then close gate valves so that supply is completely cut off. Switch on the pump and allow it to build pressure again. Watch the pressure gauge noting at what pressure it switches off at.
If you have no leaks pressure will not drop. If the valve is faulty pressure will drop assuming no leaks elsewhere. You may even hear water gurgling back down the well in the pipe

Grueller

Do like everyone else does. Hook up to mine.

Water John

Ouch. Bit of a story, to tell us?

Grueller

Water John wrote: »

Ouch. Bit of a story, to tell us?

Read the tread entitled hypothetical scenario. Was going to try hide neighbours blushes but decided I don't care.

kevthegaff

Was having big problems with big esb bill, had lads calling the whole time. Anyway lad do I g the parlour puy in a bigger air vessel in the parlour linked to the water. Pump rarely kicks in now