why the corrosion?

[jim baird]

My search for a main water supply cutoff found this device (pressure regulator) with a corroded connection to copper supply line. Why is it corroded and leaking?

34239

[David Wigger]

Galvanic reaction..........dis-similar metals.

[jim baird]

Galvanic reaction..........dis-similar metals.


Exactly my thinking, but what is that device?

[Greg Hammond]

Exactly my thinking, but what is that device?

Looks like a pressure regulator to me. Strange place for it. I'm in Phoenix though so they are almost always outside where the water main comes s into the house.

[David Wigger]

Looks like a pressure regulator to me. Strange place for it. I'm in Phoenix though so they are almost always outside where the water main comes s into the house.
Looks like we are in the crawl space, so that would be the riser coming up from the meter.

[Jerry Peck]

Looks like copper to a galvanized steel nipple to a pressure regulator and back to copper.

As previously stated - galvanic reaction (rusting through) due to dissimilar metals.

[Phil brody]

My search for a main water supply cutoff found this device (pressure regulator) with a corroded connection to copper supply line. Why is it corroded and leaking?

34239
Is that a basement or crawl space ? And is that a relatively newer build ?

[jim baird]

Thanks for the replies.

1975 ranch on crawl. Because it is an active leak I called for a plumber to go under there and fix the leak, and install a main cutoff on the riser.

[Keith Rogers]

Always interesting to see photos from other inspections.

No floor insulation or sill plate under the floor framing?

Keith

[jim baird]

Always interesting to see photos from other inspections.

No floor insulation or sill plate under the floor framing?

Keith

Wall is capped by 4" solid block, no sill plate and no anchors.