background image

6

Testing

All mechanical devices should be inspected on a regular basis to 

ensure proper functioning. The assembly should be tested at the 

time of initial installation, after servicing or maintenance, and at least 

annually thereafter. Acceptable test procedures are published by 

Foundation for Cross-Connection Control and Hydraulic Research at 

the University of Southern California (USC), American Water Works 

Association (AWWA), American Society of Sanitary Engineering 

(ASSE Series 5000), and Canadian Standards Association (CAN/

CSA B64.10). Consult the local regulatory authority for specific 

information.

Air Gap Drain

1. Before installation, check local codes. This type of drain may not 

be approved for use 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 discharge water at rates greater than the air gap drain 

capacity.

2. For an indoor installation, locate the assembly near a floor drain 

sized to adequately handle discharge. A strainer before the 

backflow assembly is strongly suggested.

3. After installation of backflow assembly and piping, attach the 

drain funnel to the relief valve as shown in the illustration by using 

the self-tapping screws provided in the kit to join the drain funnel 

halves together, making sure the slots in the drain funnel align with 

the tabs on the relief valve port.
If the flood sensor is in use, attach the air gap directly to the 

sensor. For valve sizes ½" to 1", use air gap 909AGA (ordering 

code 0881399). For valve sizes 1¼" to 2", use air gap 909AGC 

(ordering code 0881376).

 

NOTICE

The discharge of the drain funnel is a slip-fit design. The drain funnel 

is not designed or able to support drainpipe weight.

 

VALVE SIZE 

PLASTIC

PART NO.

METAL

PART NO.

1

/

2

"

905358 

905532

3

/

4

"

905358 

905532

1"

905358 

905532

1

1

/

4

"

905359 

905533

1

1

/

2

"

905359 

905533

2"

905359 

905533

Summary of Contents for FEBCO 860 Series

Page 1: ...s to discourage tampering or install a protective enclosure to discourage vandals When opting for an enclosure install the protective cover so that adequate clearance is available for maintenance and...

Page 2: ...ng assemblies of both check valves and open the inlet shutoff valve to allow sufficient flow of water through the assembly Clear all sand debris and other particles from the line If debris in the wate...

Page 3: ...semblies are disassembled and reassembled in the same manner To service the checks replace the check modules with new ones by using check module assembly kits available from FEBCO Or replace the rubbe...

Page 4: ...e from the relief valve assembly may not indicate a relief valve failure Water is discharged from the relief valve when the mainline check valves become fouled with foreign debris For more information...

Page 5: ...may become folded or creased if the internal assembly is restricted while tightening the cylinder 7 Replace the O ring Item 20 in the relief valve cover Properly seat the round bead on the large diaph...

Page 6: ...certain conditions relief valves can discharge water at rates greater than the air gap drain capacity 2 For an indoor installation locate the assembly near a floor drain sized to adequately handle dis...

Page 7: ...Seat Ring RV 1 12 1 Gasket Ring RV 1 13 Spring RV 1 14 Seat Disc RV 1 15 Diaphragm RV 1 16 Outer Diaphragm RV 1 17 Small Piston RV 1 17 1 Round HD Screw RV 1 17 2 Washer RV 1 17 3 Hex Nut RV 1 18 Cyl...

Page 8: ...1 1 4 2 32 50 Both checks Kit includes Items 2 2 3 1 qty 2 and 5 qty 2 Relief Valve Rubber Kit 905345 ALL 1 2 3 4 15 20 905345 ALL 1 25 905346 ALL 1 1 4 2 32 50 Kit includes Items 12 12 1 14 15 16 18...

Page 9: ...se the outlet ball valve After clearing the system with air partially open the outlet ball valve 7 Leave all drain valves test cocks and ball valves in the half open half closed position for the winte...

Page 10: ...line pressure variations causing relief valve to discharge Eliminate or reduce pressure variations by installing a soft seated spring loaded check on upstream side of device Pressure surges water hamm...

Page 11: ...capabilities to the relief valve of an existing installation in a BMS configuration For Cellular Communication ORDERING CODE ADD ON RETROFIT KIT DESCRIPTION 88009432 FP FBF CFS Cellular Flood Sensor C...

Page 12: ...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...

Reviews: