ABF-1LL, ASSE 1022 Vented Dual Check Back-Flow Preventer

Product Description

ABF-1LL Back-Flow Preventer

The model ABF ASSE 1022 vented dual check back-flow preventer protects the connected plumbing and drinking water from the corrosive effects of CO₂ gas. The CO₂ gas mixed with water in a carbonator tank downstream from the back-flow preventer exerts backpressure on the discharge primary check valve on every pumping cycle. If this check valve becomes fouled and leaks, the CO₂ gas and water mixture will exhaust through the vent hose barb fitting. The secondary check insures that it cannot pass to the inlet or contact any brass or copper from the connected plumbing. The simple internal construction is easy to clean. It utilizes a lead free brass body and stainless steel discharge retainer. Under no circumstance is the CO₂ gas and water mixture exposed to the lead-free brass inlet or the connected plumbing.

HOW IT WORKS

1.) Normal forward flow of H₂O has both check valves open and the vent closed.

2.) Normal backpressure of CO₂/H₂O has both check valves and vent closed.

3.) Either check valve leaking causes pressure to rise between check valves and the vent will open.

4.) Requires a minimum torque of 30 ft-lbs at center joint to function properly.

5.) Any leakage from vent indicates a fouled check valve.

*Note: A leak at the vent is normal and will happen in service due to dirty or fouled check valves.  It is the manufacturer's recommendation to clean and re-torque the device when a failure has occurred.  

CONFIGURATION 

3/8" Male Pipe Thread Inlet x 3/8" 45° Male Flare Outlet (1/4" ABS Vent Barb) (PBF) (Direct Pump)

SPECIFICATIONS & APPROVALS

ASSE 1022 
ANSF18
AB1953/VT193

SERVICE CONDITIONS

Pressure: 10-200 PSI 

Temperature: 40°-130° F 

Flow: 2.4 GPM at 15PSA

APPLICATIONS

Carbonators-Remote
Carbonators-Post Mix
Carbonators-Cold

PLUMBING CODE REQUIREMENTS
Both the UPC (Universal Plumbing Code) and NSPC (National Standard Plumbing Code) as the primary plumbing codes in the US require the use of an ASSE (American Society of Sanitary Engineers) 1022 (Performance Requirements for Backflow Preventers on Carbonated Beverage Machines) backflow preventer on the supply to carbonators under UPC 603.4.13 and NSPC 10.5.8.

 •ASSE                                     

 •NSF Listed 

Proudly Made in America

  WARNING: Products offered by Robo-Fit, Inc. can expose you to chemicals such as lead, a chemical which is known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov