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Vacuum must leak air,won't pump water model# CW-PSC 30


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  • Anonymous Feb 15, 2008

    The pump does not work.
    The water is getting heated. I disassembled the top, and noticed that some of the plastic has disintegrated. I can't figure out haow the pump mechanism works. Where does the hot water travel to get to the outlet? Can the top be replaced? At what cost? Is there anything else that could be causing this problem?



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Seals but won't draw all the air out. Seals fine

That could be a bad foam seal not completing suction, A piece of debris that got sucked into vacuum line and or in pump, or in some cases a crack in a elbow or pump housing.

Jan 22, 2016 | FoodSaver Vacuum Sealer Kit V3460

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It looks that my filter has some air in it, how can I take it out?

In a properly plumbed pump/filter system, while the pump is running air can be introduced only through the suction side of the hydraulic system. (Water can cavitate within the pump, but this is not air, rather water vapor in bubbles. Once the pressure is reduced downstream of the pump turbine, cavitation will cease and the bubbles will return to liquid water. Nevertheless, pump cavitation is a serious problem that also needs to be avoided.) In other words, air gets in upstream of the pump. Downstream the water pressure would be to great to allow ambient air to enter the system -- rather water would leak out.

On the upstream side of the pump there are several places to look for air suction:

1. Most common, water level too low in pool, and air enters through skimmers. Most pool owners discover this on their own and correct the problem.
2. Less common, suction-side fitting or seal is not properly sealed. This could be at the pump basket housing seal, the pump drain seals, an upsteam valve, etc. If you have antifreeze ports, look closely at these fittings. Be sure to replace seals often. Teflon tape should be replaced every season. In many cases the only way to find a bad suction seal is by seeing air in the pump basket. In a properly sealed system you should not see any air in the pump basket after just a few minutes of starting the pump. If you see a pocket of air continue in the basket after a few minutes, you likely have an air source upstream of the pump. The effects of a leaking seal will be amplified if the skimmer line is blocked with debris either at the skimmer or in the lines. The pump continues to work hard to suck water into the system. If it can't get water, a leaking seal will be the source of vacuum release via the entrance of air through the bad seal.
3. Less common yet, a broken skimmer line from the skimmers to the pump, potentially underground. Obviously, this is in the most costly to repair.

Here's an example of what one might find. A pool owner has forgotten to replace the Teflon tape on his antifreeze ports for many years. Since these ports are opened and closed both at the beginning and end of each season, the tape has worn out and is no longer sealing the ports. He sees a large bubble of air collecting in the pump basket, and a stream of air bubbles in the return water stream going back into the pool. His fix? Remove the antifreeze port plugs, remove the old Teflon tape, replace with new Teflon tape, then replace the plugs.

Jun 17, 2014 | Hayward SAND FILTER, PRO SERIES

1 Answer

Pump has big air bubbles and vacuum stopped working

check intake union to see if loose or leak if all ok pump seal could be leaking on intake side or could have debris in impeller clean out with a piece of wire

Jun 29, 2012 | Pentair 1.0 Hp Whisperflo Pump

2 Answers

Having over heating problems with my 2000 taurus it does it most with def. or air cond. on full blast did find small leak at water pump where it bolts to block. replaced both cooling fansand,the thermostat...

No, the sending unit is working right.
Ideas? Yes, I think the problem is the water pump. Don't drive it overheated till you get a new water pump or have it inspected. You say it's a small leak where it bolts to block, but maybe it's the "weep hole" on bottom of pump leaking, meaning the internal seals on the pump have failed. If so, it won't be a small leak, it will leak all the time engine is running. A lot may be swept away by air, or by evaporating. Check it out. That's a likely cause of overheating.

Dec 05, 2011 | 2000 Ford Taurus

2 Answers

My foodsaver model v-2440, after removing air ,it won"t change to seal .automaticly.can seal by hand .hope you can [email protected]

This is typically a bad seal and the vacuum cant build enough pressure. You can usually dampen the black rubber seal with a sponge and water before you use the machine. this solves the problem most of the time

Feb 26, 2011 | Tilia FoodSaver V2240

1 Answer

I have an oil leak from a drain hole in front of engine.what could be the problem?

If the oil plug bolt is leaking you need a new aluminum sealing washer. There are no oil weep holes in the front of the motor. Is it the weep hole under the water pump? You probably have a bad water pump seal or a bad oil seal on the water pump shaft. Buy a new water pump and the K&L water pump gasket kit. The K&L gasket kit comes with all the gaskets, seals, and washers necessary to do the water pump replacement for a fraction of the cost of the OEM Honda individual gaskets, seals, and washers.

Jan 30, 2011 | 1985 Honda GL 1200 Aspencade Gold Wing

2 Answers

I asked a question and I was given this answer; 'when you say pump you mean fuel pump make sure you have no vacum leaks under hood'. however i don't know what 'under hood' means. thanks

that just means in the engen compartment/ where your motor is loacated

  • Connect a regulator to your air pump. It is important that you keep the air intake regulated at about 3 pounds. Too much pressure could cause even more vacuum leaks.

  • 2

    Turn off you automobials engine. Attach the hose from your air pump to a part of the vacuum fitting, so air pressure can flow into the intake manifold. Begin to apply air pressure.

  • 3

    Spray soapy water onto various areas where your engine vacuum may have sprung a leak. If you see bubbles forming, that means air is being forced through the wrong place, and you have found your leak.

  • 4

    Check other engine vacuum areas with the soapy water as thoroughly as possible to make sure you do not miss any leaks. It would not be surprising that there could be more than one leak in the vacuum. While you have the air being forced through and your soapy water ready to go, find all the vacuum leaks at once and save yourself the time and hassle of having to do the whole process over again.

  • 5

    Mark any vacuum leaks with a Sharpie or paint to make sure you can find them again. There are a several parts that may need replaced to fix a leaking vacuum. Once you have pinpointed any leaks, your next project will be fixing them. and O'reillys or auto zone both carry varrious sizes of vac. lines.

  • Dec 11, 2010 | 1999 Chevrolet Blazer

    3 Answers

    Milky oil on my wr450f 2004

    your water pump seal and oil seal have failed on the water pump shaft. Replace both seals noting which way the seals face. replace the water pump shaft if it is scored. Chaz- Moto DC

    Jan 20, 2010 | 2004 Yamaha WR 450 F

    1 Answer

    Spa jets are not at full output. I have a new

    Thank you for posting your question here on

    Air in the system indicated suction leaks so you will not find 'leakage'. Instead you are looking for ways air can get in before or at the pump. That section of the plumbing is under a vacuum and a leak means air gets sucked in. Common areas are the pump seal and the pump strainer cover. Plumbing connections at the pump and then finally skimmers and other plumbing connected to the suction side of the system. Do you have a lot of air in the pump strainer basket area? If so, start with the gasket that seals the lid in that area. Is there any sign of water leaking under the pump? If so, replace the pump seal. If none of these cure your issue you may need a pressure test on the suction side of your plumbing to better identify where the leak is.

    If this answer does not fix your problem, please comment with additional details prior to rating the answer. Positive feedback is appreciated once your problem is solved!


    Jan 15, 2010 | Hayward H Series Pool & Spa Heater 400k...

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