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Old 12-04-2017, 06:34 PM   #1
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help with bladerless tank


My pump was short cycling so I drained tank (also had to replace sediment filter and fix slow leak) Drain in near bottom of tank but not underneath, so all water drained except maybe e few gallons? I got everything hooked back up and let sit for an hour then turned pump back on and it did not take long to cut off so I thought something was wrong. Then I turned on hose to get pump to turn on and it was still cycling for about 20 seconds at 30 psi and 60 psi cut in/off. .....So, I got compressor out to add air, checked shrader valve near top of tank and water came out, I did this 3 or 4 times and now I am really confused. Here is a picture of tank, you can see air control valve abut half way up.
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Old 12-04-2017, 07:08 PM   #2
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Re: help with bladerless tank


Drain the water out of the tank, close the drain, then pressurize the tank to you pre-charge pressure, then turn on the pump.
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Old 12-04-2017, 07:51 PM   #3
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Re: help with bladerless tank


The tank won't drain properly unless you let air in.
The most fool proof method is this.
Turn off the pump.
Turn on a tap somewhere and let all the pressure drain down.
Leave the tap open and start pumping air into the tank with your compressor. When air starts coming out of the tap, stop the compressor. Close the tap. Turn on the pump.
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Old 12-05-2017, 09:37 PM   #4
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Re: help with bladerless tank


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Originally Posted by joed View Post
The tank won't drain properly unless you let air in.
The most fool proof method is this.
Turn off the pump.
Turn on a tap somewhere and let all the pressure drain down.
Leave the tap open and start pumping air into the tank with your compressor. When air starts coming out of the tap, stop the compressor. Close the tap. Turn on the pump.
But he then has a tank full of air.
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Old 12-05-2017, 10:58 PM   #5
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Re: help with bladerless tank


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But he then has a tank full of air.
That is what you want when you turn the pump back on and start filling it with water.
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Old 12-06-2017, 02:07 AM   #6
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Re: help with bladerless tank


As for physical set up there aren't two of those systems alike. Some need compressed air assist to completely drain and some don't. This one pictured has never needed compressed air assist to drain being there is a drain about 4 ft. lower than the tank bottom and atmospheric air pressure is admitted into a valve that's opened at the top. The difference in tank color indicates where the normal water/air line has been for 40 + years. When the tank is void of water, close all valves, power up the well and it be good to go for awhile again.

Tank rotated 180 degrees when attaching pic and I can't solve problems that originate in India.
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Last edited by SeniorSitizen; 12-06-2017 at 02:10 AM.
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