Mifab FRP.50-QT, FRP.75-QT, FRP1.00-QT, FRP1.25-QT, FRP1.50-QT Installation Manual

Series FRP

Reduced Pressure Zone Assemblies
(1/2”, 3/4", 1”, 1 1/4”, 1 1/2" & 2”)

• Installation Instructions

• Service and Maint enance

• Testing Procedure

Reduced Pressure Zone Assemblies a re to protect potable water supply from hazardous
materials during a backflow situation.

Installation Instructions:

1. Installation and selection of the proper device should be performed by qualified, licensed

personnel.

2. Consult all local codes for proper installation requirements and restrictions.

3. The device must have adequate clearance for accessibility to perform maintenance and

testing.

4. The device must be located where discharge from the relief valve is acceptable.

NOTE: The air gap is designed to handle periodic discharge. A proper floor drain may
need to be installed to handle full discharge during certain backflow conditions.

5. Prior to installation, the lines must be thoroughly flushed to remove any debris and foreign

material. Debris in the lines can cause check valves to become fouled and require
disassembly and cleaning of the device.

6. The device must be protected from freezing conditions and excessive pressure increases.

Excessive line pressure can be caused by thermal expansion and or water hammer. Shock
arrestors, check valves and/or pressure relief valves should be installed down stream of the
device to protect excessive pressure.

Placing in Service:

Placing the unit in operation after proper installation is complete.

1. Start with the inlet and outlet ball valves closed.

2. Slowly open the inlet ball valve to pressurize the backflow preventer device.

3. Vent trapped air within the device by bleeding #2, #3 and #4 test cocks.

4. Slowly open outlet ball valve.

5. Test the device after it is properly installed. If device fails the test, check and clean all the

rubber and seats from debris. Reinstall and place unit back in service, retest the device.

1321 W. 119th Street www.beecobackflow.com
Chicago, IL 60643
Tel: [phone] Fax: [phone]

Service and Maint enance:

Check Valve Removal

1. Close the inlet and outlet ball valves. Open No. 2, 3 and 4 test cocks to reduce remaining

pressure in the assembly. Test cock No. 1 will remain closed. Keep test cocks open until
reassembly.

2. Remove cover by unthreading with appropriate wrench.

3. Remove the check valve spacer by pulling up from opening.

4. Remove the inlet check valve assembly by pulling it in the direction of flow until free from

the body and then lift out.

5. Remove the outlet check valve assembly by grasping the flattened nut on the end of the

check assembly with pliers. Then pull in the opposite direction of flow until it is free from
the body and lift out by hand.

Relief Valve Removal

1. Close the inlet and outlet shut off valves. Open No. 2, 3 and 4 test cocks to reduce remaining

pressure in the assembly. Test cock No. 1 will remain closed. Keep test cocks open until
reassembly.

2. Cover has slight spring pressure. Firmly hold cover and remove the Cover Bolts and Cover.

The Relief Valve Assembly will pull out from the body.

Maintenance

1. Rinse all parts thoroughly with water after disassembly.

2. Carefully inspect rubber seals, seats and o-rings for damage and debris.

3. Apply Dow Corning 111 Valve Lubricant & Seal to the O-Rings before reinstallation.

4. Test the device after reassembly to ensure proper operation.

Testing Procedure:

Testing should be performed by qualified, licensed personnel. Testing procedure should be
performed per local codes and guidelines.

CALIFORNIA PROPOSITION 65 WARNING
WARNING: This product contains chemicals known to the State of California to cause cancer and

birth defects or other reproductive harm.
(Installer: California law requires that this warning be given to the consumer)

LIMITED WARRANTY: Beeco warrants each product against defects in material and workmanship for a period of one year from the date of original
shipment. In the event of such defects within the warranty period, Beeco will, at its option, replace or recondition the product without charge. This shall
constitute the exclusive remedy for breach of warranty, and Beeco shall not be responsible for any incidental or consequential damages, including without
limitation, damages of other costs resulting from labor charges, delays, vandalism, negligence, fouling caused by foreign material, dama g e f rom adverse water
conditions, chemicals, or any other circumstances over which Beeco has no control. This warranty shall be invalidated by any abuse, misuse, misapplication or
improper installation of the product.

1321 W. 119th Street www.beecobackflow.com
Chicago, IL 60643
Tel: [phone] Fax: [phone]