The bladder in a 1988 vintage pressure tank for home well is shot.
Pump itself is 325 feet down at bottom of the well. I will probably
replace the tank with one suggested from local plumbing supply
wholesaler but curious on a statement seen on Filtrol brand tank seen at
Home Depot the other day while picking up painting supplies.

The box for the unit claimed that this 19.2 PSI tank was equivalent to a
44 PSI unit.

What black magic are they doing to make this happen or
has technology in this field improved to some great point?

Steve

On 5/27/2012 6:33 AM, Steve Stone wrote:
The bladder in a 1988 vintage pressure tank for home well is shot.
Pump itself is 325 feet down at bottom of the well. I will probably
replace the tank with one suggested from local plumbing supply
wholesaler but curious on a statement seen on Filtrol brand tank seen at
Home Depot the other day while picking up painting supplies.

The box for the unit claimed that this 19.2 PSI tank was equivalent to a
44 PSI unit.

What black magic are they doing to make this happen or
has technology in this field improved to some great point?

Steve

It relies on the stretched rubber bladder to supply the missing pressure.

Paul

"Steve Stone" wrote in message ...
The bladder in a 1988 vintage pressure tank for home well is shot.
Pump itself is 325 feet down at bottom of the well. I will probably
replace the tank with one suggested from local plumbing supply
wholesaler but curious on a statement seen on Filtrol brand tank seen at
Home Depot the other day while picking up painting supplies.

The box for the unit claimed that this 19.2 PSI tank was equivalent to a
44 PSI unit.

What black magic are they doing to make this happen or
has technology in this field improved to some great point?

Steve

Submersible pumps the ones at bottom of the well
usually use either 30-50 or 40-60 switches
this tank is set up for 20-40 or 24-44 as cut in 2-4 lbs less
19.2 PSI is empty no water in tank 44 cut off and has a 60 max
Its easier to get Correct pressure by letting air to about 16-18 lbs
if needed as This would be a ball park setting
look for one that has 100 max and adjust the air PSI empty to 2-4 lbs less
then your pressure switch before turning on the pump
Don't worry about the factory precharge pressure

Robert

On May 27, 6:33*am, Steve Stone wrote:
The bladder in a 1988 vintage pressure tank for home well is shot.
Pump itself is 325 feet down at bottom of the well. I will probably
replace the tank with one suggested from local plumbing supply
wholesaler but curious on a statement seen on Filtrol brand tank seen at
Home Depot the other day while picking up painting supplies.

The box for the unit claimed that this 19.2 PSI tank was equivalent to a
44 PSI unit.

What black magic are they doing to make this happen or
has technology in this field improved to some great point?

Steve

IDK what they are saying when they say a 19.2 PSI tank is equivalent
to a 44psi unit, unless they mean that by using a pressurized bladder
they get the same performance as a 44 psi unit....the bladder keeps
the pressure at a minimum level up to the point where the tank
completely empties. So if you have the bladder pressure at 19.2psi,
then the tank pressure will not drop below 19.2 psi until it totally
empties, at which point it plummets immediately to zero.

Without the bladder, tank pressure slowly drops to zero as the tank
empties, and the last dozen gallons can trickle out at 5psi or less,
which is for the most part unusable.

On May 27, 5:14*pm, Ook wrote:
On May 27, 6:33*am, Steve Stone wrote:

The bladder in a 1988 vintage pressure tank for home well is shot.
Pump itself is 325 feet down at bottom of the well. I will probably
replace the tank with one suggested from local plumbing supply
wholesaler but curious on a statement seen on Filtrol brand tank seen at
Home Depot the other day while picking up painting supplies.

The box for the unit claimed that this 19.2 PSI tank was equivalent to a
44 PSI unit.

What black magic are they doing to make this happen or
has technology in this field improved to some great point?

Steve

IDK what they are saying when they say a 19.2 PSI tank is equivalent
to a 44psi unit, unless they mean that by using a pressurized bladder
they get the same performance as a 44 psi unit....the bladder keeps
the pressure at a minimum level up to the point where the tank
completely empties. So if you have the bladder pressure at 19.2psi,
then the tank pressure will not drop below 19.2 psi until it totally
empties, at which point it plummets immediately to zero.

Without the bladder, tank pressure slowly drops to zero as the tank
empties, and the last dozen gallons can trickle out at 5psi or less,
which is for the most part unusable.

Wrong. Tanks will always have a minimum pressure of whatever the cut-
in is. Gauge _may_ go to zero but only if the bladder blocks off the
tank outlet. In normal operation the guage will read the cut-in
pressure when the pump starts, e.g., set for 30-50 with precharge of
28 the guage will never
read less than 30 if everything is working correctly.

That is true whether the tank is bladderless or has a bladder.

Harry K

On May 27, 11:43*am, "spud42" wrote:
"Steve Stone" wrote in ...
The bladder in a 1988 vintage pressure tank for home well is shot.
Pump itself is 325 feet down at bottom of the well. I will probably
replace the tank with one suggested from local plumbing supply
wholesaler but curious on a statement seen on Filtrol brand tank seen at
Home Depot the other day while picking up painting supplies.

The box for the unit claimed that this 19.2 PSI tank was equivalent to a
44 PSI unit.

What black magic are they doing to make this happen or
has technology in this field improved to some great point?

Steve

Submersible pumps the ones *at bottom of the well
usually use either 30-50 or 40-60 switches
this tank is set up for 20-40 or 24-44 as cut in 2-4 lbs less
19.2 PSI is empty no water in tank 44 cut off and has a 60 max
Its easier to get Correct pressure by letting air to about 16-18 lbs
if needed as This would be a ball park setting
look for one that has 100 max and adjust the air PSI empty to *2-4 lbs less
then your pressure switch before turning on the pump
Don't worry about the factory precharge *pressure

Robert

The precharge is set normally to 2pis below cut-in. thus if the cut-
in is 40 psi, pre-charge is set to 38.

I think the OP is misreading what he saw as that makes no sense.

On May 27, 7:35*am, Paul Drahn wrote:
On 5/27/2012 6:33 AM, Steve Stone wrote: The bladder in a 1988 vintage pressure tank for home well is shot.
Pump itself is 325 feet down at bottom of the well. I will probably
replace the tank with one suggested from local plumbing supply
wholesaler but curious on a statement seen on Filtrol brand tank seen at
Home Depot the other day while picking up painting supplies.

The box for the unit claimed that this 19.2 PSI tank was equivalent to a
44 PSI unit.

What black magic are they doing to make this happen or
has technology in this field improved to some great point?

Steve

It relies on the stretched rubber bladder to supply the missing pressure.

Paul

Wrong and I think the OP is misunderstanding the statement - it makes
no sense.

Harry K

On May 27, 11:36*pm, Harry K wrote:
On May 27, 5:14*pm, Ook wrote:





On May 27, 6:33*am, Steve Stone wrote:

The bladder in a 1988 vintage pressure tank for home well is shot.
Pump itself is 325 feet down at bottom of the well. I will probably
replace the tank with one suggested from local plumbing supply
wholesaler but curious on a statement seen on Filtrol brand tank seen at
Home Depot the other day while picking up painting supplies.

The box for the unit claimed that this 19.2 PSI tank was equivalent to a
44 PSI unit.

What black magic are they doing to make this happen or
has technology in this field improved to some great point?

Steve

IDK what they are saying when they say a 19.2 PSI tank is equivalent
to a 44psi unit, unless they mean that by using a pressurized bladder
they get the same performance as a 44 psi unit....the bladder keeps
the pressure at a minimum level up to the point where the tank
completely empties. So if you have the bladder pressure at 19.2psi,
then the tank pressure will not drop below 19.2 psi until it totally
empties, at which point it plummets immediately to zero.

Without the bladder, tank pressure slowly drops to zero as the tank
empties, and the last dozen gallons can trickle out at 5psi or less,
which is for the most part unusable.

Wrong. *Tanks will always have a minimum pressure of whatever the cut-
in is. *Gauge _may_ go to zero but only if the bladder blocks off the
tank outlet. *In normal operation the guage will read the cut-in
pressure when the pump starts, e.g., set for 30-50 with precharge of
28 the guage will never
read less than 30 if everything is working correctly.

That is true whether the tank is bladderless or has a bladder.

Harry K- Hide quoted text -

- Show quoted text -

I think what he is talking about is if the pump is turned off. Then
the tanks do behave as he describes. The pressure goes down
slowly until all the water is gone, then it suddenly plummets to zero.
With a tank without the bladder at the point that occurs, you'd start
having air come out and that would continue as the pressure
continued a steady decline to zero as all the air came out.

On May 28, 7:37*am, "
wrote:
On May 27, 11:36*pm, Harry K wrote:





On May 27, 5:14*pm, Ook wrote:

On May 27, 6:33*am, Steve Stone wrote:

The bladder in a 1988 vintage pressure tank for home well is shot.
Pump itself is 325 feet down at bottom of the well. I will probably
replace the tank with one suggested from local plumbing supply
wholesaler but curious on a statement seen on Filtrol brand tank seen at
Home Depot the other day while picking up painting supplies.

The box for the unit claimed that this 19.2 PSI tank was equivalent to a
44 PSI unit.

What black magic are they doing to make this happen or
has technology in this field improved to some great point?

Steve

IDK what they are saying when they say a 19.2 PSI tank is equivalent
to a 44psi unit, unless they mean that by using a pressurized bladder
they get the same performance as a 44 psi unit....the bladder keeps
the pressure at a minimum level up to the point where the tank
completely empties. So if you have the bladder pressure at 19.2psi,
then the tank pressure will not drop below 19.2 psi until it totally
empties, at which point it plummets immediately to zero.

Without the bladder, tank pressure slowly drops to zero as the tank
empties, and the last dozen gallons can trickle out at 5psi or less,
which is for the most part unusable.

Wrong. *Tanks will always have a minimum pressure of whatever the cut-
in is. *Gauge _may_ go to zero but only if the bladder blocks off the
tank outlet. *In normal operation the guage will read the cut-in
pressure when the pump starts, e.g., set for 30-50 with precharge of
28 the guage will never
read less than 30 if everything is working correctly.

That is true whether the tank is bladderless or has a bladder.

Harry K- Hide quoted text -

- Show quoted text -

I think what he is talking about is if the pump is turned off.

I reread it again and still don't see that he is saying that. He
sounds like he means when the pump is
on.

*Then
the tanks do behave as he describes. *The pressure goes down
slowly until all the water is gone, then it suddenly plummets to zero.
With a tank without the bladder at the point that occurs, you'd start
having air come out and that would continue as the pressure
continued a steady decline to zero as all the air came out.

True. The bladder tank would go to zero when the bladder collapses
enough to block the tank outlet. Gauge would read zero but there
would still be a bit of pressure in the tank.

Harry K

On Sun, 27 May 2012 09:33:05 -0400, Steve Stone
wrote:

The bladder in a 1988 vintage pressure tank for home well is shot.
Pump itself is 325 feet down at bottom of the well. I will probably
replace the tank with one suggested from local plumbing supply
wholesaler but curious on a statement seen on Filtrol brand tank seen at
Home Depot the other day while picking up painting supplies.

The box for the unit claimed that this 19.2 PSI tank was equivalent to a
44 PSI unit.

What black magic are they doing to make this happen or
has technology in this field improved to some great point?

Steve

Contact the manufacturer of the tank and ask them. What you posted
makes no sense at all. Either you are reading something wrong, or this
is another advertising gimmick which means little of nothing. Ads are
often deceiving. Kind of like saying "our cereal contains twice the
amount of vitamins as brand X." What they dont tell you is that the
contents of their cereal box, is twice the weight of "brand X". (and
costs 3x as much). So, yea, 40oz of cereal really does contain twice
the vitamins of a 20oz box......

On 5/29/2012 9:47 AM, wrote:
On Sun, 27 May 2012 09:33:05 -0400, Steve
wrote:


Contact the manufacturer of the tank and ask them. What you posted
makes no sense at all.

My mistake. Company name is flotec.

http://www.homedepot.com/Plumbing-Pr...&storeId=10051

Description:
Featuring an appliance-like finish for a long life, the Flotec 19-Gallon
Pre-Charged Pressure Tank with 42-Gallon Equivalent Rating is
pre-charged to 40 psi. The tank features heavy-gauge steel construction,
and the metal parts of this durable tank do not touch water.
Conveniently sized, this tank is ideal for lawn sprinkling and has an
air/water separator that can be replaced.

On 5/30/2012 11:31 AM, Steve Stone wrote:
On 5/29/2012 9:47 AM, wrote:
On Sun, 27 May 2012 09:33:05 -0400, Steve
wrote:


Contact the manufacturer of the tank and ask them. What you posted
makes no sense at all.

My mistake. Company name is flotec.

http://...
....

OK, from there can get the actual tank model and look at the
manufacturer's site for it--

http://www.flotecpump.com/ResidentialProduct_fl_hw_tk_FP7110T.aspx

It's pretty lame, but the "explanation" is on the FAQ page...

http://www.flotecpump.com/residentialpage_resource_faq_tanks.aspx

They're claiming it's an equivalent to the volume required for equal
water volume capacity to a nonpressurized air-over-water tank is what
the 42 gal number represents.

--

It's pretty lame, but the "explanation" is on the FAQ page...


Thanks for pointing me in the right direction.

One design item I found of interest was their claim that the bladders in
their tanks are replaceable. Does that mean it's a good design or their
air bladders have short life spans???

Steve