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-   -   Mounting of HWH expansion tank (http://www.diychatroom.com/f7/mounting-hwh-expansion-tank-92486/)

steve0617 01-16-2011 12:42 PM

Mounting of HWH expansion tank
 
3 Attachment(s)
Where do I actually mount and support an expansion tank? My horizontal 3/4" supply pipes are up in the I beams and then the cold supply drops down to the ball valve to the cold water in.

I know the tank has to go after the valve but I don't want it installed horizontally (and unsupported) so do I remove the valve and the supply line, then T off the 3/4" then install a new valve then the tank attached somehow (how?) to the I-beam then to the new supply then into the HWH?

AllanJ 01-16-2011 09:06 PM

Put a tee just under the shutoff valve for the water heater. Add a pipe to connect to the expansion tank that will be upright and just above the water heater with the pipe connection underneath. Any means, even ropes attached to the pipe it is screwed on and up to the joists above, can support the expansion tank.

Suggest not obstructing the water heater anode which is a long rod that unscrew and lifts out of the top of the heater and that needs headroom to remove, inspect, and replace when worn out.

steve0617 01-16-2011 09:13 PM

Quote:

Originally Posted by AllanJ (Post 571882)
Put a tee just under the shutoff valve for the water heater. Add a pipe to connect to the expansion tank that will be upright and just above the water heater with the pipe connection underneath. Any means, even ropes attached to the pipe it is screwed on and up to the joists above, can support the expansion tank.

Suggest not obstructing the water heater anode which is a long rod that unscrew and lifts out of the top of the heater and that needs headroom to remove, inspect, and replace when worn out.

Got it. Thanks a ton.

Homerepairguy 01-17-2011 12:37 PM

Steve0617,

From your pictures, it's hard to tell whether you have a heat trap check valve in the hot water out line from the heater. If you don't have a heat trap check valve, maybe consider installing a "S" type heat trap to prevent the hot water from losing heat via convection up the output pipe.

Not related to your expansion tank to be installed in your cold water input line but may be something else to consider in addition to leaving room for the anode rod replacement, when you route your expansion tank line.

HRG

steve0617 01-17-2011 12:44 PM

Quote:

Originally Posted by Homerepairguy (Post 572308)
Steve0617,

From your pictures, it's hard to tell whether you have a heat trap check valve in the hot water out line from the heater. If you don't have a heat trap check valve, maybe consider installing a "S" type heat trap to prevent the hot water from losing heat via convection up the output pipe.

Not related to your expansion tank to be installed in your cold water input line but may be something else to consider in addition to leaving room for the anode rod replacement, when you route your expansion tank line.

HRG

No heat trap at all. When the heater's going, the cold line gets warm too. Bleh. Will fix that too.


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