What is the definition of DWV?
DWV is an acronym used in the plumbing industry which means Drainage, Waste and Vents.
Does the pipe have to be lubricated before the flashing is installed over the pipe?
No. You should however bevel (chamfer) the pipe end to prevent cutting or scaring of the rain collar as it is being pushed over the pipe.
What material is rain collars made from?
TPE, Thermoplastic Elastomer
Is there a flashing made for roofs over a 45° angle (12/12 roof)?
Yes. The Oatey High-Rise Thermoplastic All-Flash No-Caulk Flashing is designed for roof up to a 60° angle (20/12 roof).
Can the Master Flash flashing be installed on a shingled roof?
No. The Master Flash and Retro-Master Flash are specialty flashings designed for engineered roofs.
Can standard No-Caulk roof flashings be installed on a metal roof?
No. The Oatey Master Flash or Retro-Master Flash should be used in this application.
How long should a roof flashing last?
This question doesn’t have a correct answer because of many variables that could affect the life span of a flashing. Examples are extreme heat, extreme cold, and hail.
What are the maximum temperature rating for roof flashings?
Oatey Master Flash and Retro-Master Flash are rated for continuous temperatures up to 212°F. All other Oatey flashings are rated for B venting, which are continuous temperatures up to 180°F.
What can be used to seal the No-Caulk flashing to the rooftop?
100% exterior or marine rated silicone caulk can be used to seal plastic base flashings to the rooftop.
What flashing is used for single wall metal exhaust pipes attached to water heaters and furnaces?
Single wall metal exhaust pipe should never be used to vent a water heater or furnace when the pipe passes through a combustible material of any kind due to risk of fire. The flashing rain collar will melt or warp if exposed to these temperatures passing through the single wall pipe, and loose the water tight seal it is designed for. All water heaters and furnaces not listed as high efficient should be vented using rated B vent pipe. B vent pipe is doubled wall pipe which isolates most of the exhaust heat to the interior pipe. All Oatey flashings are safe to use with B rated vent piping.