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Water pump problem

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(@kenneth)
Posts: 51
Trusted Member
Topic starter
 

Hi all,

Just recently, my electric water pump is acting strange. Usually it maintains a water pressure of 60psi(?) When it drops to about 30, only then will it start pumping again.

But lately, any slight drop in pressure and it immediately compensates. Even if I turn on the faucet, it immediately starts pumping. I'm afraid it'll get overworked. Any ideas what could be the problem?

Thanks

 
Posted : 23/02/2009 11:08 pm
opzuk4x4
(@opzuk4x4)
Posts: 146
Estimable Member
 

Re: Water pump problem

Do you have a pressure tank with the pump? You may have accumulated air inside the tank. Drain the tank then start all over. Adjust the on/off cut out as necessary. HTH!

GACA CONSTRUCTION

 
Posted : 23/02/2009 11:29 pm
(@kenneth)
Posts: 51
Trusted Member
Topic starter
 

Re: Water pump problem

Drained the pressure tank and that fixed it. Thanks!

 
Posted : 09/03/2009 2:53 pm
trackers888
(@trackers888)
Posts: 9
Active Member
 

Re: Water pump problem

Nice input! 🙂

"Don't be too timid and squeamish about your actions. All life is an experiment. The more experiment you make the better"

 
Posted : 19/04/2009 1:30 pm
(@hardworker)
Posts: 11
Active Member
 

Re: Water pump problem

May 2 storey appartment po akong project on the way na po, bale 12 unit po lahat, 6 sa ibaba at 6 sa itaas.May tanong po ako tungkol sa water pump machine at water meter ng NAWASA.Posible po bang sa 6 na water meter ay 1 pump machine lang ang mag su suply ng tubig sa 6 na unit papuntang itaas?At sa water pump machine pwede po bang mag connect ng 6 na switch para sa bawat unit sa itaas? Kaya ang bawat gagamit sa itaas ay sa kanya ma charge ang konsumo ng koryente ng pump machine.May mabibili po bang water pump machine na 6 na switch?At kung wala man po,Posible po bang mangyari ito? Maraming salamat po sa mga tutugon sa aking mga katanungan.

 
Posted : 04/07/2009 11:48 pm
(@kasie)
Posts: 8
Active Member
 

Re: Water pump problem

Do you have a pressure tank with the pump? You may have accumulated air inside the tank. Drain the tank then start all over. Adjust the on/off cut out as necessary. HTH!

excellent solution! however the underlying cause of the problem is not because of "accumulated air inside the tank" but rather the lack of it. The air cushion required for the pressure switch to do its job is being depleted (an air leak albeit a small one). Flushing the tank is a good first step because this will replenish the air cushion but unless the small air leak is fixed, the problem will recur every so often.

 
Posted : 06/09/2009 11:18 pm
(@kenneth)
Posts: 51
Trusted Member
Topic starter
 

Re: Water pump problem

Hi All,

I have another problem, low water pressure. How do I adjust the pressure pump on my water tank? I think its a standard pressure pump. Can't seem to find any switches or dials. I did open the whats indicated as as the controller box, but all thats inside is wires and a curious spring with a long screw inside. Could this be the pressure switch? What are the recommended settings? I want to adjust it to turn on at about 30 and stop at about 60

 
Posted : 14/09/2009 10:49 pm
(@estib)
Posts: 11
Active Member
 

Re: Water pump problem

Hi All,

I have another problem, low water pressure. How do I adjust the pressure pump on my water tank? I think its a standard pressure pump. Can't seem to find any switches or dials. I did open the whats indicated as as the controller box, but all thats inside is wires and a curious spring with a long screw inside. Could this be the pressure switch? What are the recommended settings? I want to adjust it to turn on at about 30 and stop at about 60

The long screw is for the cut off pressure. The tighter it is the higher the cut off pressure. As for the shorter screw, it's the differential between the cut off and the turn on pressure. I think the max difference for most switches is 20 psi. So you need to adjust the cut off pressure first then adjust the difference between the cut off and the cut in pressure to achieve the desired settings.

 
Posted : 16/09/2009 2:06 pm
(@kenneth)
Posts: 51
Trusted Member
Topic starter
 

Re: Water pump problem

Thanks Estib. Though my pump only has one pressure switch. I tightened the nut and it seems to have raised the cut in and cut off. Thanks

 
Posted : 17/09/2009 11:07 am
(@twisted)
Posts: 103
Estimable Member
 

Re: Water pump problem

i also have a problem with our pressure tank, the hose between the pump and the tank keeps leaking. i was thinking of replacing the whole line from the water pump to the pressure tank with pvc pipe instead. please tell me if this is a bad idea.
i figured if the pvc lines from the pressure tank going into the house could hold the pressure, then maybe it(pvc pipe) could also hold the pressure in between the pump and the tank.

also how does that process go, the draining of the tank? didnt know i had to do that.

 
Posted : 14/05/2011 10:10 am
(@joey81)
Posts: 1098
Member
 

Re: Water pump problem

i also have a problem with our pressure tank, the hose between the pump and the tank keeps leaking. i was thinking of replacing the whole line from the water pump to the pressure tank with pvc pipe instead. please tell me if this is a bad idea.
i figured if the pvc lines from the pressure tank going into the house could hold the pressure, then maybe it(pvc pipe) could also hold the pressure in between the pump and the tank.

also how does that process go, the draining of the tank? didnt know i had to do that.

One advantage of the hose is its flexibility. Does the water pump vibrate much? If it does I suggest you just use more teflon tape and better clamps on the hose.

However, if the tank is significantly far from the pump then you'll use a long stretch of PVC pipe.
This long piece should offer enough flexibility to absorb the vibration. What you don't want to happen is to subject the joints to too much vibration because that will eventually weaken the joints and they'll start leaking.

On draining the tank. Most pressure thanks have a plug at the bottom for this purpose. Turn off the pumo and wait until the tank is almost empty (para hindi masyadong maraming tubig ang masayang). Then remove the plug to drain the tank. Turn on the pump with the drain open to thoroughly wash away the rust, wait until the water coming out is clean enough for your satisfaction. Turn off the pump and put the plug back in.

For easier draining in the future, I suggest you do the same trick JayL used in his air compressors:

http://www.pinoyhandyman.com/showpost.php?p=19150&postcount=130

 
Posted : 14/05/2011 10:48 am
bmac
 bmac
(@bmac)
Posts: 114
Estimable Member
 

Re: Water pump problem

saan ang leak? sa connection ba? malamang ang pump discharge at tank inlet ay magkalapit lang.

hose clamp ba ang ginamitin? kung dito ang leak, palit ka ng mahusay na clamp. or sukatin mo kung kaya pa lagyan ng pangalawang clamp.

sa paggamit ng PVC, walang kadudaduda na kaya ang pressure ng pump.

kung meron sobrang vibration ang pump, malamang bearing yan. ilan taon na ba ang pump?
pacheck up niyo ang pump. kasi kung meron sobrang vibration yan. tataas ang ampere at siyempre tataas din ang power consumption.

cheers

bmac

 
Posted : 14/05/2011 10:27 pm
(@horsepower)
Posts: 27
Eminent Member
 

Re: Water pump problem

If you can, try to use PP-R3 (like Ariete, VESBO). From experience, PVC degrades over time (and its solvent). Had a horror when Maynilad suddenly increased our water pressure to 40psi. A lot of homeowners in my area were shocked with very high water bills (including my mom). Her formerly 200 pesos per month suddenly increased to 1200!

These days, I always encourage everyone to use PPR3 due to its sturdiness (apparently leakproof for at least 50years). SO far, all PPR3 we've installed showed no problems (here in Luzon and in Mindanao). It's a bit expensive at first (not really much, by a very small margin compared to PVC). You will just have to buy the fusion welding tool (or you can borrow it from the store with a bond if you're friends with the said store's owner). There are also specific fittings for this type of pipe.

 
Posted : 16/05/2011 4:15 pm
(@horsepower)
Posts: 27
Eminent Member
 

Re: Water pump problem

May 2 storey appartment po akong project on the way na po, bale 12 unit po lahat, 6 sa ibaba at 6 sa itaas.May tanong po ako tungkol sa water pump machine at water meter ng NAWASA.Posible po bang sa 6 na water meter ay 1 pump machine lang ang mag su suply ng tubig sa 6 na unit papuntang itaas?At sa water pump machine pwede po bang mag connect ng 6 na switch para sa bawat unit sa itaas? Kaya ang bawat gagamit sa itaas ay sa kanya ma charge ang konsumo ng koryente ng pump machine.May mabibili po bang water pump machine na 6 na switch?At kung wala man po,Posible po bang mangyari ito? Maraming salamat po sa mga tutugon sa aking mga katanungan.

Though this reply is very late (hehehe!), I'd be interested if there's anyone who can figure this out as I myself, see no possibility of this setup.

Pwede 1 nawasa meter then puro submeters na. Best setup for this is an overhead tank, in my opinion. Magkakagulo kasi ang mga tenants.

pwede din 1 pump per meter. That's the painless way to do it. These days, I see supercompact waterpumps with supercompact membrane tanks for pressure tanks, though I have no idea about its longevity. Last I had a hardware -alone-time at Home Depot, IIRC, it's about 5-6k.

 
Posted : 16/05/2011 4:23 pm
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