Installation Guide

26
(e.g. PVC-2CT installation)
Exhaust
2 in. (50 mm)
or
3 in. (75 mm)
Intake
2 in. (50 mm)
or
3 in. (75 mm)
PVC-2CT or
PVC-3CT
Plastic Rain Cap*
(PRC-1)
Increaser coupling*
* Not supplied with
water heater, order
separately.
12 in. (305 mm)
above grade or
over maximum
snow level.
≥ 3 ft Min.
3 in. (75 mm) pipe and 2 in. × 3 in. Increaser
coupling requires when using PRC-1, using
rain cap part #PRC-1.
PRC-1
3 in. (75 mm) pipe
2 in. (50 mm) pipe
2 in. × 3 in. Increaser coupling
• The combustion
air intake of any
appliance
• Any other building
opening
2 in. pipe**
3 in. pipe
3 in. pipe
2 in. × 3 in. Increaser
coupling
When using PVC-3CT, 3 in. (75 mm) pipe
and 2 in. × 3 in. Increaser couplings are
required.
Increaser couplings need to be used just
prior to PVC-3CT.
** The length of the pipe between the
Increaser couplings and the
Exhaust and Intake Flue of the
Water Heater, and the concentric
termination vent pipe connections
should be up to 6 in. (152 mm).
For Vertical PVC Concentric Termination - PVC/CPVC Material Only
• The concentric termination may be shortened, but not lengthened from its original factory supplied length.
• 2 in. (50 mm) or 3 in. (75 mm) PVC or CPVC pipe may be used with the concentric termination.
Maintain the same vent pipe diameter from the Water Heater flue to the termination.
• Use a condensation drain if necessary.
• In the Commonwealth of Massachusetts a carbon monoxide detector is required for all side wall horizontally
vented gas fuel equipment. Refer to Technical Bulletin TB 010606 for full installation instructions.
Venting the Water Heater