Install piping through the wall as shown in Figure 3. Adequate length of pipe must protrude
beyond the exterior wall for attachment of the termination fitting. The recommended
distance between the terminal fitting and the exterior wall is 1 in. (2.5 cm). Directions for
cementing joints (such as the terminal fittings to the straight pipe) can be found on page 24.
Two 45° elbows are provided with the water heater for termination fittings. If other fittings
are required (i.e. 90° elbows) they must be purchased separately. Install a screen inside the air
intake termination fitting to prevent items from entering the system. Complete the instal-
lation of the remainder of the vent and air intake system and attach to the water heater as
shown in Figure 4. It is recommended that horizontal sections of piping slope downward
away from the water heater a minimum of 1/8 inch per foot (10mm per meter) to prevent
condensate from flowing back towards the water heater.
CAUTION
Annular spaces around vent pipe wall penetrations shall be permanently sealed using
approved materials to prevent entry of combustion products into the building.
Page 15
SECTION IV: INSTALLATION (cont .)
VENT & COMBUSTION AIR INTAKE (cont.)
Vent Terminal
From
Water
Heater
Wall
Outside of
Building
Inside of
Building
Vent Pipe
12" (30 cm)
or greater
Ground Level
Wall Section View
Outside View
CAUTION
-
NEVER INSTALL AIR INTAKE ABOVE VENT
(EXHAUST) TERMINAL
12" (30 cm)
MIN.
(center-to-center)
Vent
(Exhaust)
Terminal
Combustion
Air
Intake
Terminal
(w/
protective
screen)
Figure 3: Horizontal Venting, 2-pipe termination
Figure 3: Horizontal Venting, 2-pipe termination
BOCK WATER HEATERS, INC.
110 S. DICKINSON ST. MADISON, WI 53703
SCALE: 1:24
SIZE DWG. NO.
A
REV.
MATERIAL
FINISH
--
xxxx
DO NOT SCALE DRAWING
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL
±
ANGULAR: MACH
± BEND ±
TWO PLACE DECIMAL
± x.xx
THREE PLACE DECIMAL
± x.xxx
NAME
DATE
DRAWN
CHECKED
ENG APPR.
MFG APPR.
Q.A.
SHEET 1 OF 1
WEIGHT:
COMMENTS:
THE INFORMATION CONTAINED IN THIS
DRAWING IS THE SOLE PROPERTY OF
BOCK WATER HEATERS, INC. ANY
REPRODUCTION IN PART OR AS A WHOLE
WITHOUT THE WRITTEN PERMISSION OF
BOCK WATER HEATERS, INC. IS
PROHIBITED.
PROPRIETARY AND CONFIDENTIAL
A
A
B
B
D
E
Before Elbow
4" MIN
Vertical Length
Vent (To Outside)
Air Intake
(From Outside)
3" Pipe
3" Pipe
Figure 4 : Horizontal Direct Vent Connections to Water Heater (3" and 4" pipe systems)
Air Intake
(From Outside)
Vent (To Outside)
3" pipe systems
4" pipe systems
Exhaust
Adapter
Before Elbow
4" MIN
Vertical Length
3" Pipe
3" Pipe
4" x 3"
Reducing Coupling
4" Pipe
Exhaust
Adapter
EZ PDV Manual
Horizontal Venting, 2-pipe to
Water Heater
1/4/11
xxxxx
MBS
0
HOT
COLD
10°
SECTION B-B
Figure 4: Horizontal Direct Vent Connections to Water Heater
