Pressure tank size

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Jdbeck

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Hi folks!

I have a question about sizing for a pressure tank.

My current set up is a well x trol 203 and a sta-rite 3/4 hp 10gpm
pump with a 175 ft well.

I checked the tank this am, after noticing the pump cycling a lot and come
to find i have a ruptured bladder.

Since I need to replace the tank anyway, I am considering a bigger tank

7 people ( 2 adult, 5 kids )

The pressures were 30/50 but it was too low, so i boosted to 40/60 and
increased the bladder pressure to 38. That was about 6 months ago, and things performed better.

Pros / Cons appreciated.

Thanks !

Jeff
 

Speedbump

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If you have a submersible pump, I recommend a Cycle Stop Valve and a smaller tank. A 42 gallon Bladder Tank equivalent should be about perfect.

This way, you won't cycle the pump motor to death and you will also have constant pressure while the pump is running.

bob...
 
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Jdbeck

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Bob,

after looking at your page on tanks, i am still a bit confused.

when you say 42G 'equivalent' would that be the wwt-20?

Suppose i don't add the CSV - another whole kettle of fish as I don't
want to pull the pump up to do it.

What size would you estimate without the valve?

Thanks !

Jeff in Maryland
 

Speedbump

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Yes, the 42 gal equivalent is the PC-66 or the WWT-20. You don't have to pull your pump to install a CSV. Just install it anywhere between the pump and tank/pressure switch. If your putting one inside, go with the brass CSV1Z.

bob...
 

Valveman

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Without a CSV, one minute of run time is required and two minutes is better. That would take a 40 gallon bladder tank for one minute, or an 80 gallon tank for two minutes. Even a two minute cycle is fairly short when you consider there are 1440 minutes in a day. Cycling is what busted the bladder in the tank you have now. 40 gallon tank would give you the minimum cycling time, 80 gallon tank cuts the cycling in half, the CSV and a 20 gallon tank completely eliminates cycling during long term uses of water.
 
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