Is the change in WH vent proper/allowable?

The vent piping for this gas water heater looks suspect, specifically the change from B-vent to some type of corrugated vent. This is a 1 yr old house. The WH is in the garage.

Expandable B Vent

7 Likes

It’s okay.

5 Likes

It seems excessive and unnecessary, but it’s not an issue.

1 Like

That is flexible B-vent pipe, the fittings on each end lock it in place.

2 Likes

Thank you for the education.

1 Like