Standard #1056

Back Siphonage Vacuum Breaker

ASSE Issued - 2001

Apollo Valves/Conbraco Industries

Revision: 1993

Model: SVB

Size: 3/8” inlet x ½”

Model: SVB (4W-502)

Size: 3/8”

Model: SVB (4W-503)

Size: ½”

Model: SVB (4W-501-02)

Size: ¼”

Issued: 11/08/1999

Watts Regulator Co.

(All models listed under this standard are also approved with the model prefix of LF)

Revision: 1993

Model: Series 008 (LF, PC)

Size: ³/8", ½”

Issued: 04/21/1994

Revision: 1995

Model: 008 QT

Size: ¾” & 1"

Issued: 07/14/1995

Revision: 1993

Model: 008 PC-QT

Size: ³/8", ½”

Issued: 03/22/1999

Revision: 1993

Model: 008PCQT

Size: ¾” & 1"

Issued: 09/17/1999

Wilkins/Division of Zurn Industries

Revision: 2001

Model: 460

Size: ½” & 3/8” FNPT connections

Issued: 03/21/2006

Revision: 2001

Model: 460

Size: ¾”

Issued: 12/19/2007

Revision: 2001

Model: 460

Size: 1”

Issued: 12/19/2007