ADS Environmental Services FlowAlert QR 775011 A2 - Manual (Page 162)

6-10 ADS FlowAlert Manual
Positioning the nuts on the stud to receive the mounting bracket
11. Mount the bottom of the mounting bracket onto the monitor
flange with two 3/8-inch x 1-inch hex bolts, 3/8 – 16 nex nuts,
and 3/8-inch washers. It may be necessary to drill new holes in
the flange.
Bolting the mounting bracket to the flange welded to the monitor
12. Carefully lower the monitor into the manhole, and place the
keyhole in the bracket over the outer nut on the stud.