Expansion Tanks On Cold Water Lines

[mathew stouffer]

I thought water heater expansion tanks had to be on the Hot water line. I found two installations today with the tank on the cold water line. The first photo, the tank was connected to the main water line for the home. Any thoughts?

Mat

[Gunnar Alquist]

I can't imagine that it would really matter. I guess you could refer to the manufacturer's installation instructions.

[Billy Stephens]

-- installations today with the tank on the cold water line.

Any thoughts?

Mat
.
Both Installation manuals I have show expansion tank on inlet side.

Watt's and attachment

[David Banks]

This was addressed recently.
http://www.inspectionnews.net/home_inspection/plumbing-system-home-inspection-commercial-inspection/6603-expansion-tank-hot-side.html

[Jerry Peck]

They say cold water side, a few may allow on hot water side, however, they also state shorter life if on the hot side, however ...

They should not be mounted with their weight off a tee like that.

[Paul Kondzich]

Is that home made connection to the draft hood acceptable?

[mathew stouffer]

Paul,
The back of that connection was leaking CO.

[Nick Ostrowski]

Leaking because of lack of proper support on the tank or leaking because of all the polybutylene piping?

[John Arnold]

Is that home made connection to the draft hood acceptable?

Not even close.

[Nick Ostrowski]

You're such an elitist John.

[John Arnold]

You're such an elitist John.

Yes, but I'm a bitter elitist.
Very, very bitter.

[mathew stouffer]

What is not even close, I am lost. Yes the PB is in bad shape, even with the copper fittings. The manifold was corroded.