Existing gas burning furnaces and hot water tanks and their plastic venting systems will not require action until replacement of the appliance is required as the requirement is not retroactive to installations made prior April 16, 2007.
For all new appliance installations and replacement installations the existing plastic venting (not intake vent) must be completely replaced with a certified ULC S636 plastic venting system.
Answer - False? It may stay if pressure tested.
As per TSSA Ref. No. FS-101-07
There may be situations where the replacement of the entire vent is not possible or is impractical due to specifics of that particular installation. For those situations, TSSA will consider a variance to allow the continued use of the existing vent provided that all of the following conditions are met:
1. It is not possible or practical to replace the entire vent;
2. The first 5 feet immediately downstream of the appliance is replaced with vent that is:
a. Suitable for the appliance; and,
b. Certified to ULC S636.
3. The existing vent is visually inspected and found in good working order (cracked or damaged vent is not allowed to be repaired - the entire vent shall be replaced).
4. The existing vent is pressure tested ...
Standard three light electrical testers are NOT
always reliable because:
A. Some receptacles only have two prongs
B. Three light testers some times have broken bulbs
C. Three light testers will not detect multiple wiring problems
D. Different test device manufactures have different light patterns