Service Manual

Specifications

Vent Tables

(Intake Only)

Determining Required Intake Vent Length

5. Determine the total length of straight vent pipe (in feet) required for the intake.

6. Add 5 feet of venting for every 90° elbow.

7. Add 2 ½ feet of venting for every 45° elbow.

8. Total vent length cannot exceed Max Intake Vent Length on the venting table shown above.

Example of Total Intake Vent Length for UCG100H199 installation:

A 3” venting system has a total of two 90-degree elbows and a total straight pipe length of 10 feet.

Equivalent vent length for elbows: 2 x 5 feet = 10 feet.

Total equivalent vent distance = 10 feet + 10 feet = 20 feet total equivalent vent length. This is

below the maximum allowed distance of 50 feet for this model using 3” vent.

Model Number

2” Max Intake

Vent Length (feet)

3” Max Intake

Vent Length (feet)

4” Max Intake

Vent Length (feet)

UCG80H125

UCG(80,100)H199

Approved Venting Materials

For installations in the US only

• PVC Sch. 40 (ASTM D-1785, ULC 1738, ULC

S636)

• DWV PVC Sch. 40 (ASTM-D2665)

• CPVC Sch. 40 (ASTM-F441, ASTM-D2846,

ULC S636)

• Polypropylene (UL 1738, ULC S636)

• ABS Sch. 40 DWV (ASTM D2661)

For installations in CANADA

• ULC S636 approved Sch. 40 PVC and CPVC for

flue gas venting rated Class II, 65°C

(components provided with water heater)

• ULC S636 approved Polypropylene for flue gas

venting rated Class II, 65°C

Approved Primers and Cements

For installations in the US only

• PVC and CPVC Primer (ASTM F-656)

• PVC Cement (ASTM D-2564)

• CPVC Cement (ASTM F493)

• ABS Primer and Cement (ASTM D-2235)

For installations in CANADA

• ULC S636 approved PVC Primer and Cement

for flue gas venting rated Class II, 65°C