Thermal Expansion Tanks - Plumbing Zone

PLUMBER_BILL · 11-29-2009, 12:52 PM

When you install a Amtrol Thermal ST-5 or ST-12 tank pre-charged at @40 PSI. Do you check to see what the static pressure really is and pump up or decrease the pre-charge as necessary.

Reason for the post ... Watts tanks have a label printed in black on the box.

"The maximum pre-charge on the contents of this package is 20 PSI"

TheMaster · 11-29-2009, 12:53 PM

Well yeah if i'm going to install it I want it to work.

DUNBAR PLUMBING · 11-29-2009, 01:09 PM

Always.

You're screwing the property owner otherwise as premature wear will be guaranteed.

Indie · 11-29-2009, 02:58 PM

Always check the tank pressure. I have had several tanks with varying charges. Tank is always 2 psi less than cut on of well switch.

bigdaddyrob · 11-30-2009, 12:22 AM

yup, we lost big money with this apparently once. So we had tags to sign off that they were checked when put into operation on install.

11-29-2009, 12:52 PM	#1
PLUMBER_BILL The Old (antique) Master Join Date: Oct 2009 Location: ALLENTOWN, PA Posts: 930 My Photos	Thermal Expansion Tanks When you install a Amtrol Thermal ST-5 or ST-12 tank pre-charged at @40 PSI. Do you check to see what the static pressure really is and pump up or decrease the pre-charge as necessary. Reason for the post ... Watts tanks have a label printed in black on the box. "The maximum pre-charge on the contents of this package is 20 PSI" __________________ Bill Parr LMP www.parrsplumbing.com click on ... A little of this and a little of that

11-29-2009, 01:09 PM	#3
DUNBAR PLUMBING www.DunbarPlumbing.com Join Date: Sep 2008 Location: NORTHERN KENTUCKY - GREATER CINCINNATI AREA Posts: 4,495 My Photos	Always. You're screwing the property owner otherwise as premature wear will be guaranteed. __________________ Northern Kentucky Plumbers *\|YOUTUBE VIDEOS\| Twitter Feed \| DUNBAR PLUMBING FAN PAGE*

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11-29-2009, 12:53 PM	#2
TheMaster Registered Member Join Date: Jun 2009 Posts: 6,437 My Photos	Well yeah if i'm going to install it I want it to work.

11-29-2009, 02:58 PM	#4
Indie AAAAAAAAHHHHH!!! Join Date: Sep 2009 Posts: 3,610 My Photos	Always check the tank pressure. I have had several tanks with varying charges. Tank is always 2 psi less than cut on of well switch.

11-30-2009, 12:22 AM	#5
bigdaddyrob Senior Member Join Date: May 2009 Location: Baltimore,MD Posts: 117 My Photos	yup, we lost big money with this apparently once. So we had tags to sign off that they were checked when put into operation on install.