Flomatic AVB2 Installation Manual

Backflow Preventer Installation Instructions

Models AVB 3/4” thru 2” / 20mm thru 50mm

FAILURE TO FOLLOW THESE INSTRUCTION WILL VOID ANY WARRANTY

Connect the supply piping to the bottom of the Danfoss Flomatic model AVB. Connect the outlet of
the vacuum breaker to the fixture being served as shown in the diagram below.

The extreme bottom of the AVB shall be taken as the critical installation level. Therefore, the
highest fixture being served shall be a minimum of 6 inches (150mm) below the bottom of the AVB.

CAUTION: This device should never be used in installations that are under continuous pressure.
Therefore, never place a shut-off or check valve downstream of AVB’s.

This device shall not be installed in a concealed or inaccessible location, or where the venting water
from the device during normal functioning may be deemed objectionable.

1 Year Limited Warranty: Danfoss Flomatic valves are guaranteed against defects of materials or workmanship when
used for the services recommended. If in any recommended service, a defect develops due to material or workmanship,
and the device is returned, freight prepaid, to Danfoss Flomatic within 12 months from the date of purchase, it will be
repaired or replaced free of charge. Danfoss Flomatics’ liability shall be limited to our agreement to repair or replace the
valve only.

MAIN CAP WITH

INTEGRAL SEAT

HIGH TEMP

SEAL RING

MAIN CAP
GASKET

LIGHTWEIGHT DURABLE
FLOAT SEALS TIGHT AT
MINIMUM FLOW

Danfoss Flomatic

Danfoss Flomatic Corp, 15 Pruyn’s Island, Glens Falls, New York 12801

Phone: [phone] Fax: [phone] www.flomatic.com

April 21,2004 Rev. A (7/08)

AVB2