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Venting continued-
For installations in the US
• PVC DWV (ASTM D-2665)
• PVC Sch. 40, 80, 120 (ASTM-
D1785)
• CPVC Sch. 40, 80 (ASTM-
F441)
• CPVC (ASTM D2846)
• ABS Sch. 40 DWV (ASTM
D2661)
Approved Primers and Cements
For installations in the US
• PVC and CPVC Primer (ASTM-
F656)
• PVC Cement (ASTM D-2564)
• CPVC Cement (ASTM F493)
• ABS Primer and Cement
(ASTM D-2235)
Use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel
(polyphenosulfone) in non-metallic venting systems is prohibited, and
covering non-metallic venting with thermal insulation is prohibited.
Venting System Condensation
Condensate formation does not occur in all installations of pow er vented
w ater heaters, but should be protected against on installations w here
condensation can form in the venting system.
Formation of condensation in the venting system of Pow er Vented w ater
heaters is dependent upon installation conditions including, but not limited
to:
ambient temperature and humidity of installation location;
ambient temperature and humidity of venting space;
vent distance and slope;
and product usage.
In order to effectively control condensate from adversely affecting the
mechanical components of the w ater heater several methods may be
employed:
1.
For horizontal installations the vent pipe can be installed w ith a dow nw ard
slope (not less than 1/8" (3 cm)) and aw ay from the blow er.
Approved Venting Materials
only
only
For installations in CANADA
• ULC S636 approved PVC for
flue gas venting rated Class II,
65°C
• ULC S636 approved CPVC for
flue gas venting rated Class II,
65°C
For installations in CANADA
• ULC S636 approved Primer and
Cement for flue gas venting
rated Class II, 65°C
NOTICE
11
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