The FEBCO 1" (or 1-1/4") PVB will have "765-1" cast into the body.

It is 4" wide, 4.5" tall and 3" thick.

Also, look at the "bonnet". It has three plastic posts and three supports.

Click here to be taken to the online store to order parts for the FEBCO 1" PVB

The FEBCO 1/2" or 3/4" PVB will have "765" cast into the body.

The body is 3 " wide, 3" tall and 2" thick.

Also, look at the "bonnet". It has six plastic tabs that extend 1/2 inch byond the body.

Click here to be taken to the online store to order parts for the FEBCO 3/4" PVB