User Guide

Installation diagram
5
MAINS
SUPPLY
Drain
Vent
Floor
Air gap
BACKFL
O
W
PREV
Series:
5
73
Sizes:
1/2”
- 3
/4”
S/
N
VENT
BACKFL
O
W
PREVE
Series:
5
73
Sizes:
1/2”
- 3
/4”
S/
N
VENT
Heating system application
MAINS
SUPPLY
Upstream
test cock
Upstream
shut-off valve
Downstream
shut-off valve
Downstream
test cock
Inlet test
cock
Backflow preventer
573 series
Y-strainer
BACKFL
O
W
PREV
Series:
5
73
Sizes:
1/2”
- 3
/4”
S/
N
VENT
Field testing installation