FREEZE PROTECTION
The backflow prevention assembly may be subject to damage if the internal water is allowed to freeze. The unit must be protected from
freezing using a heated enclosure, insulation heat tape, or other suitable means. The unit must always be accessible for testing and
maintenance. If the system will be shut down during freezing weather, use the following procedures to drain internal passages.
Ball Valve Shut-Off Draining Procedure
If the assembly has been installed with ball valve shut-off valves, they must also be properly drained to
prevent freeze damage. After draining procedure has been completed on the backflow prevention assembly,
position all ball valve shut-offs and test cocks in a half open/half closed (45 degree) position.
Open the ball valve approximately 45 degrees while draining the pipeline and assembly to allow water
between the ball valve and valve body to drain. Leave the ball valve in this position for the winter to prevent
freeze damage.
The ball valve must be fully closed before the system is repressurized. OPEN AND CLOSE BALL VALVES
SLOWLY TO PREVENT DAMAGE TO THE SYSTEM CAUSED BY WATER HAMMER.
Main Valve Draining Procedure (
3
/
4
" - 2")
1. Close the main shut-off valve.
2. Open the inlet drain.
3. Open the inlet and outlet ball valves 45 degree (half open, half closed).
4. Open all testcocks.
5. Open the outlet drain.
6. Remove the cover and inlet check module until all water inside valve drains back out through inlet drain.
7. If you
blowout the piping downstream of the backflow assembly using compressed air: Connect the air supply to the
outlet drain and close the outlet ball valve. After clearing the system with air, partially open the outlet ball valve. Leave all
drain valves, testcocks, and ball valves in half open/half closed position for the winter.
WARRANTY
All products manufactured and sold by CMB Industries, Inc. carry with them the following warranty: CMB Industries, Inc. warrants to the
original purchaser (who is the end user) all products manufactured by it will be free from defects in workmanship and material for a
period of one (1) year from the date of original shipment.
CMB Industries, Inc. also warrants that all internal components of
1
/
2
" through 2" Model 850/860 and
1
/
2
" through 1" Model 766 products,
will be free from defects in workmanship and material for a period of five (5) years from the date of original shipment and also that the
body only of the
1
/
2
" through 1
1
/
4
" Model 765 will be subject to a lifetime warranty against damage by freezing.
This warranty is applicable provided such products are used under normal conditions within the recognized pressure, flow and
temperature limits and are given normal service and care. CMB INDUSTRIES, INC. MAKES NO OTHER REPRESENTATION OR
WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED, IN FACT OR IN LAW, AND EXPRESSLY DISCLAIMS ALL OTHER WARRAN-
TIES, INCLUDING WITHOUT LIMITATION, THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR PARTICULAR PURPOSE.
In the event of a defect in material or workmanship of a product covered by this warranty, CMB Industries, Inc. shall, at its sole option,
repair or replace such defective product. CMB Industries, Inc. shall not be liable for any labor required to repair or replace any product
covered by this warranty. This warranty is void with respect to any such product which is altered or tampered with by anyone
without prior consent of CMB Industries, Inc. CMB Industries, Inc. shall not be liable under any circumstances for damages caused by
accident, misuse or abuse of the product or for failure to follow the installation, maintenance or operating instructions. IN NO EVENT
SHALL CMB INDUSTRIES BE LIABLE FOR CONSEQUENTIAL, INCIDENTAL, INDIRECT, PERSONAL INJURY, PROPERTY OR
PUNITIVE DAMAGES.
To make a claim under this warranty, the buyer must notify the factory in writing within ten (10) days of discovery of any claimed defects
or workmanship, and if authorized by the factory, shall return the product in the same condition as when received by the buyer,
transportation prepaid, to the factory or to such other location as directed by the factory. If said returned product is found by the factory
to be defective in workmanship or materials, it shall be repaired or replaced without charge, pursuant to the terms of this warranty. This
warranty excludes component parts or appurtenances not manufactured by CMB Industries, Inc. Any claims with respect to such
equipment must be made to the manufacturer thereof in accordance with the terms of the warranty, if any, given by such manufacturer,
or pursuant to such warranties as may exist by law. The physical or chemical properties of CMB Industries, Inc. products represent
typical, average values obtained in accordance with test methods and are subject to normal manufacturing variations. This information
is supplied as a technical service and is subject to change without notice.
Post Office Box 8070 • Fresno, California • U.S.A.
Tel# (559) 252-0791 • Fax# (559) 453-9030
www.FEBCOonline.com
PN 980116
Copyright 2001 CMB Industries, Inc.
MM805SM 11/01