I bought a reverse action pressure switch that I want to add
electrically in series with the existing well water pressure switch. The
new switch closes on pressure rise. With both switches in series and
with the water tank pressurized if a pipe were to break the well pump
would eventually draw air and the pressure would go towards zero and the
reverse acting switch would shut the pump off. I would have to add a
double pole double throw switch so that at zero pressure the reverse
action switch could be bypassed and the system could come up to pressure.

Can anyone find fault with such a system?

Thank you for your time.

andy everett wrote:

I bought a reverse action pressure switch that I want to add
electrically in series with the existing well water pressure switch. The
new switch closes on pressure rise. With both switches in series and
with the water tank pressurized if a pipe were to break the well pump
would eventually draw air and the pressure would go towards zero and the
reverse acting switch would shut the pump off. I would have to add a
double pole double throw switch so that at zero pressure the reverse
action switch could be bypassed and the system could come up to pressure.

Can anyone find fault with such a system?

Thank you for your time.


You're right about your pump needing protection like that.
And the addition of another press sw and a manual bypass does have
its appeal.

However, the boys at Square D are way ahead on that score.
For a long time they have offered models in their "Pumptrol"
line which incorporate a mechanical low-pressure cutoff feature.

http://ecatalog.squared.com/catalog/.../17320014.html

Look at the FSG2, for example.
Order it with the M4 Form modification which gives
it a built-in low pressure cutoff. (listed half way down page)

FSG with M4 is an on-the-shelf item at most supply houses.
And the price can't be beat.
Not to mention all the labor you save not having to wire in
additional devices...

Jim

Speedy Jim wrote:
andy everett wrote:

I bought a reverse action pressure switch that I want to add
electrically in series with the existing well water pressure switch.
The new switch closes on pressure rise. With both switches in series
and with the water tank pressurized if a pipe were to break the well
pump would eventually draw air and the pressure would go towards zero
and the reverse acting switch would shut the pump off. I would have to
add a double pole double throw switch so that at zero pressure the
reverse action switch could be bypassed and the system could come up
to pressure.

Can anyone find fault with such a system?

Thank you for your time.



You're right about your pump needing protection like that.
And the addition of another press sw and a manual bypass does have
its appeal.

However, the boys at Square D are way ahead on that score.
For a long time they have offered models in their "Pumptrol"
line which incorporate a mechanical low-pressure cutoff feature.

http://ecatalog.squared.com/catalog/.../17320014.html

Look at the FSG2, for example.
Order it with the M4 Form modification which gives
it a built-in low pressure cutoff. (listed half way down page)

FSG with M4 is an on-the-shelf item at most supply houses.
And the price can't be beat.
Not to mention all the labor you save not having to wire in
additional devices...

Jim

That is the way to go, I should have asked here BEFORE I bought the
reverse acting switch. Thank you for your help!

On Sun, 14 Jan 2007 19:00:58 GMT, andy everett
wrote:

I bought a reverse action pressure switch that I want to add
electrically in series with the existing well water pressure switch. The
new switch closes on pressure rise. With both switches in series and
with the water tank pressurized if a pipe were to break the well pump
would eventually draw air and the pressure would go towards zero and the
reverse acting switch would shut the pump off. I would have to add a
double pole double throw switch so that at zero pressure the reverse
action switch could be bypassed and the system could come up to pressure.

Can anyone find fault with such a system?

Thank you for your time.

They make well pressure switches with a low pressure cutout built in.
It's to protect the pump from running dry.

There's a little lever on the side you flip to temporarily bypass it
at startup.

It looks exactly like the standard switch, just has the extra little
lever. I got mine at Lowes or HD.

I think your plan would work, but this would be a lot less work.

HTH,

Paul

Paul Franklin wrote:
On Sun, 14 Jan 2007 19:00:58 GMT, andy everett
wrote:


I bought a reverse action pressure switch that I want to add
electrically in series with the existing well water pressure switch. The
new switch closes on pressure rise. With both switches in series and
with the water tank pressurized if a pipe were to break the well pump
would eventually draw air and the pressure would go towards zero and the
reverse acting switch would shut the pump off. I would have to add a
double pole double throw switch so that at zero pressure the reverse
action switch could be bypassed and the system could come up to pressure.

Can anyone find fault with such a system?

Thank you for your time.


They make well pressure switches with a low pressure cutout built in.
It's to protect the pump from running dry.

There's a little lever on the side you flip to temporarily bypass it
at startup.

It looks exactly like the standard switch, just has the extra little
lever. I got mine at Lowes or HD.

I think your plan would work, but this would be a lot less work.

HTH,

Paul


Thank you, I agree. Will shop for it. Anyone need a Square D
9013FRG22J19 Cheap %^)