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For additional information, visit our web site at: FEBCOonline.com

NOTICE

The freeze protection backflow prevention assembly may be subject to 

damage if the internal water is allowed to freeze . The unit must be pro-

tected from freezing using a heated enclosure, insulation using 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 .

NOTICE

Ball Valve Shutoff Draining Procedure

If the assembly has been installed with ball valve shutoff valves, they must 

also be properly drained to prevent freeze damage . After draining proce-

dure has been completed on the backflow prevention assembly, position 

all ball valve shutoffs 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.

MAINTENANCE MANUAL: MODELS 860, LF860, 860U & LF860U 

1

/

2

"- 2" (15 – 50mm)

Main Valve Draining Procedure 

1

/

2

" -  2" (15 - 50mm)

1 . Close the main shutoff 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 .

8 .  (RP UNITS ONLY) Loosen the relief valve cover to drain . Tighten when 

draining is complete .

9 .  *Reset Ball Valve

Limited Warranty: 

FEBCO (the “Company”) warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment.  

In the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge.  

THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT.  THE COMPANY MAKES NO OTHER 

WARRANTIES, EXPRESS OR IMPLIED.  THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED 

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, special 

or consequential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs resulting 

from labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the Company has no 

control.  This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product.  

Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages.  Therefore the above 

limitations may not apply to you.  This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State.  You should consult applicable state laws to 

determine your rights.  

SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF 

MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.

WARNING:

 This product contains chemicals known to the 

State of California to cause cancer and birth defects or 

other reproductive harm.

For more information: www.watts.com/prop65

IOM-F-860_860U 1437 

EDP# 1915983 

© 2014 FEBCO

USA:

  Tel: (800) 767-1234 • Fax: (800) 788-4491 • FEBCOonline.com

Canada:  

Tel: (905) 332-4090 • Fax: (905) 332-7068 • FEBCOonline.ca

Latin America:  

(52) 81-1001-8600 • Fax: (52) 81-8000-7091 •  FEBCOonline.com

A Watts Water Technologies Company

*

Summary of Contents for 860 Series

Page 1: ...pair Kits 11 Freeze Protection 11 Main Valve Draining Procedure 1 2 2 11 Warranty 12 WARNING Read this Manual BEFORE using this equipment Failure to read and follow all safety and use information can...

Page 2: ...uctions and product safety information before begin ning the installation of this product FAILURE TO COMPLY WITH PROPER INSTALLATION AND MAINTENANCE INSTRUCTIONS COULD RESULT IN PRODUCT FAILURE WHICH...

Page 3: ...heck local codes 3 Rinse all parts with clean water before reassembly 4 Carefully inspect diaphragms seals and seating surfaces for damage or debris If the check valve seat disc has been severely cut...

Page 4: ...spect and replace If necessary than discharge is created through D Damaged seat or seat disc seat disc can be reversed in the valve the pressure drop should increase 1 2 through 2 sizes to approximate...

Page 5: ...d during field testing B Plugged low pressure hydraulic passage Inspect and clean from ZONE to inner diaphragm C Improper alignment of internal parts during Reassemble reassembly causing high resistan...

Page 6: ...ernal components with clean water Replace disc retainer and secure with retaining screw Item 5 2 3 Reassemble check module in the reverse manner as indicated in above When reassembling the check modul...

Page 7: ...l all test cocks have been closed and pressure stabilized 6 Check for external leaks and repair if necessary Slowly open outlet ball valve 7 Test assembly in accordance with the locally approved test...

Page 8: ...en CAUTION Do not twist the internal parts when the cylinder is tightened The small diaphragm may become folded or creased if the internal assembly is restricted while tightening the cylinder 7 Replac...

Page 9: ...e in some areas CAUTION This drain is intended to catch moderate relief valve discharges due to line pressure fluctuations and minor check valve fouling Under certain conditions relief valves can disc...

Page 10: ...4 11 2 4 Poppet 2 5 Seat Disc 2 5 1 Disc Retainer 2 5 2 Round HD Screw 2 6 Spring 1 1st Check Spring 6 1 Spring 1 2nd Check Spring 7 Guide 2 8 Retainer Spacer 1 9 Ball Valve Tapped 1 Union End BV Tapp...

Page 11: ...Kit 905342 ALL 1 2 3 4 15 20 905343 ALL 1 25 905344 ALL 1 1 4 2 32 50 Both checks Kit Includes Item 2 2 2 ea of items 3 1 5 Relief Valve Rubber Kit 905345 ALL 1 2 3 4 15 20 905345 ALL 1 25 905346 ALL...

Page 12: ...one year from the date of original shipment In the event of such defects within the warranty period the Company will at its option replace or recondition the product without charge THE WARRANTY SET F...

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