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juliewest
juliewest

Posted: Wed Oct 27, 2010 8:29am

Post Subject: Water pump

We have a jabasco model No 31395-0292, 12v. Recently on turning the tap on there is a delay in water coming out, about 10secs. Could the pressure in the accumulator have dropped? If so, how do we re-charge the pressure?

Tony-B
Tony-B

Posted: Wed Oct 27, 2010 8:49am

Post Subject: Water pump

Dear Julie, This is not an accumulator pressure problem, its far more likely to be a problem with the pressure switch (which is under the smaller housing right on the end of the pump), its operating diaphragm, or the small drilling between the main pump outlet and the diaphragm chamber. Some accumulators have no means of pressurising so these are taken off and any water inside is shaken out. This type must be mounted vertically with the water connection at the bottom. Most however have a plastic "disk" on the top that is unscrewed to reveal a car type tyre valve. If the unit really is an accumulator then pressurise it to about half the system cut out pressure with NO pressure in the system. If it's being used as an expansion vessel it needs pressurising to the pump cutout pressure, again with NO pressure in the system. It is hard to say which it is without inspecting the system. Tony Brooks

juliewest
juliewest

Posted: Wed Oct 27, 2010 9:03am

Post Subject: Water pump

Thanks Tony. If we take the pressure switch off, how do we tell if it is not working properly? Can we test the diaphragm?

Tony-B
Tony-B

Posted: Wed Oct 27, 2010 10:06am

Post Subject: Water pump

You just inspect it for scale, broken spring etc. You may be able to poke a very thin piece of soft wire through the drilling of you may be able to turn the pump on and flush the hole out by pump pressure. It could be easier to fit an external pressure switch simply bypassing the wiring to the switch on the pump. Tony Brooks

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