American Standard TCWH-199-AS Installation Start-Up Maintenance Parts page 13

Figure 1 – Specifications and Dimensions
A
B
C
D
E
F
G
Table 4 – Adapter Specifications
Description
Exhaust Outlet Pipe
Air Intake
Gas Inlet
DHW Outlet Adapter
DHW Inlet Adapter
Condensate Adapter
DHW Inlet Filter
Diameter
3"
3"
3/4"
3/4"
3/4"
1/2"
N/A
13