Watts LF8 - Manual (Page 2)

Approvals
Series LF8, LF8A, LF8B, 8P, LF8FR and LFNF8 are listed by
IAPMO.
Capacity
Dimensions – Weights
Installations
Drainage Features to Prevent Freezing
Models LF8A, LF8B, LF8FR and 8P hose connection vacuum
breakers are constructed to allow sill cocks to be drained. Simply
remove hose coupling and lightly pull knurled tip of stem at outlet
of valve to allow drainage of collected water.
Do not use where discharge
of water is objectionable.
Hose Bibb
Vacuum
Breaker
For Inside or Outside Use
Installation - Inside Service Sink
Performance** Curve
Flow
0 1 2 3 4 5 6 7 8 9 10 gpm
0 3.8 7.6 11.4 15.1 18.9 23 27 30 34 38 lpm
**Performance as established by an independent testing laboratory.
kPa psi
276 40
241 35
207 30
172 25
138 20
103 15
69 10
35 5
Supply Pressure
A
B
MOdeL SIze dIMeNSIONS WeIgHt
A B
In. In. mm In. mm oz. gm.
LF8, LF8C, LF8B, LF8BC 3⁄4 HT 11⁄2 38 13⁄8 35 4.0 113.4
LF8A, LF8AC 3⁄4 HT 11⁄2 38 11⁄2 38 4.0 113.4
LFNF8 3⁄4 HT 2 51 11⁄2 38 5.3 151.2
8P 3⁄4 HT 13⁄4 38 13⁄8 35 1.5 42.5
LF8FR 3⁄4 HT 13⁄4 38 13⁄4 38 7.0 200.0
Hose Bibb
Vacuum Breaker
What is Backsiphonage?
A reversal of normal flow in the system
caused by a negative pressure (vacuum
or partial vacuum) in the supply piping.
1011 B64.2
ES-LF8 1331 © 2013 Watts
USA: Tel: (978) 688-1811 • Fax: (978) 794-1848 • www.watts.com
Canada: Tel: (905) 332-4090 • Fax: (905) 332-7068 • www.watts.ca
A Watts Water Technologies Company
NOTICE
NOTICE
Inquire with governing authorities for local installation requirements
Do not use Models LF8, LF8A, LF8B, 8P, LF8FR Hose Bibb
Vacuum Breakers on frost-free hydrants. Specify Model LFNF8.