Installation Guide
6ZV-3247 REV 0
6. BACK TO BACK INSTALLATION
6.1 Back to Back Wall Type
1. To simplify piping on back to back
installations use one standard valve (hot
on left, cold on right) and one reverse seat
valve (hot on right, cold on left) as shown in
FIGURE 6.1.
NOTE: Back to back installations require
5-1/2" (140 mm) minimum wall thickness for
proper installation, with or without bracket.
6.2 Identify Reverse Seat Valve
1. Locate the "R" stamp on bottom side of the
valve casting to identify reverse seat valve
as shown in FIGURE 6.2.
6.3 Install Piping/Fittings (Bracket Removed for Clarity)
1. Inlet marked H on standard valve should be
plumbed to inlet marked C on reverse seat
valve. Inlet marked C on standard valve
should be plumbed to inlet marked H on
reverse seat valve (see FIGURE 6.3).
2. Follow STEPS 5.3 - 5.5 to complete
installation of valve bodies.
FIGURE 6.3
HOT
HOT
COLD
COLD
STANDARD
VALVE
REVERSE
SEAT
VALVE
H
H
C
C
FIGURE 6.2
T
R
REVERSE SEAT VALVE,
BOTTOM SIDE
T
R
ROUGH-IN
2-3/8"
± 1/2"
(60 mm ± 13 mm)
FIGURE 6.1
5-1/2"
(140 mm)
MIN. WALL
THICKNESS
STANDARD
VALVE
REVERSE
SEAT
VALVE
COLD