Bell & Gossett HS 114B User Manual

Xylem

1) The tissue in plants that brings water upward from the roots;

2) a leading global water technology company.

We’re 12,500 people unified in a common purpose: creating innovative solutions
to meet our world’s water needs. Developing new technologies that will improve
the way water is used, conserved, and re-used in the future is central to our work.
We move, treat, analyze, and return water to the environment, and we help people
use water efficiently, in their homes, buildings, factories and farms. In more than
150 countries, we have strong, long-standing relationships with customers who
know us for our powerful combination of leading product brands and applications
expertise, backed by a legacy of innovation.

For more information on how Xylem can help you, go to www.xyleminc.com

Xylem Inc.

8200 N. Austin Avenue
Morton Grove, Illinois 60053
Phone: [phone]
Fax: [phone]
www.xyleminc.com/brands/bellgossett

Bell & Gossett is a trademark of Xylem Inc. or one of its subsidiaries.
© 2012 Xylem Inc. HS-114B October 2012 Part No. 511094

INSTRUCTION MANUAL

Hoffman Specialty
Model 78
Internal Parts Kit
Part No. 601402

HS-114

REVISION B

®

Internal Parts Kit (P.N. 601402) contains O­rings for both the old and new design of the
Model 78 Water Main Vent Valve. It is
important that the proper O-ring be
installed into the correct base.

The larger diameter and cross section
O-ring is for use with the old design
Vent Valve. Improper sealing and leakage

will occur if the smaller O-ring is used with
the old design Vent Valve. This may result
in property damage or personal injury.

The old design Vent Valve can be identified
by examining the outside thread area of the
cap, or the inside thread area of the base.
The old design cap has only a small
chamfer (approximately 1/32”) on the
outside edge of the cap. Refer to the cross
section Diagram A. The old design has an
undercut at the bottom of the internal
threads. Refer to the cross section
Diagram B.

For reference, Diagrams C and D show
cross section views of the new design cap
and base.

Old Design

Cap

1/32-INCH CHAMFER

Diagram A Diagram B

Base

OF THREADS

UNDERCUT

AREA

AT BOTTOM

New Design

Cap

3/32-INCH CHAMFER

Diagram C Diagram D

Base

NO UNDERCUT