What is it?

[Tom Rees]

Hi all. My inspection yesterday was a condo built in 1965, first floor of two floors. This was installed above the main water service pipe where it entered the mechanical closet on a riser three feet above shut off and pressure reducing valve. I have never seen one of these but I know one of you have, please help. Thanks.

[Ron Hasil]

http://www.zurnbyaspiremart.com/prodimages/Z1700S.gif

That is a Zurn/Wilkins water hammer arrester. http://zurn.com/operations/specdrain/pdfs/installation/WH1.pdf

[Tom Rees]

I knew you would know Ron. Thanks for your many contributions to this site.

[Ron Hasil]

Your welcome. Here is the link to Zurn's catalog for the device. Arrestors - Zurn.com (http://www.zurn.com/pages/catalog.asp?ProductGroupID=83&OperationID=14) I also edited my other post and posted the spec sheet for it.