Water heater component

1

Can someone help me as Im unsure what this item is on top of the hot water tank
I tried my best to find a label or model number
?

15819701562688018581546468875019
158197015626880185815464688750193024×4032 2.22 MB

2

shopping
shopping600×600 29.3 KB

https://www.google.com/shopping/product/120414555823514439?q=old+type+of+water+heater+relief+valves&rlz=1C1CHBF_enUS782US782&sxsrf=ACYBGNT1H5miutwVl7Ohw30b_ohOnldQ_Q:1581970458223&biw=1405&bih=686&prds=epd:10819259667762741855,prmr:3&sa=X&ved=0ahUKEwjdrNqcs9nnAhVkg3IEHexyBSQQ8gIIjwM

3

Looks like an atmospheric vacuum breaker. This is used on a water heater if the water heaters location is above point if use. Was this located in an attic?

4

Michael, it’s a vacuum breaker required by some jurisdictions. It’s there to prevent the WH tank from collapsing in case a fire engine is pumping water nearby.

Are you from Massachusetts?

5

https://www.diychatroom.com/f7/new-electric-water-heater-vacuum-breaker-necessary-5911/

Google plumber.

I’ve installed a number of these when water heaters were located in a finished attic. Never heard about that fire pumping thing there must be water heaters imploding all over the country.

6

Thanks for the replies. The tank was in a utility room connected to the garage. 2007 tank. Still operational.
The furnace on the other hand…:unamused: