COLLARS

Rain collars are an essential component in roofing systems, designed to provide an additional layer of protection against water intrusion around penetrations such as pipes or vent stacks. Made from galvanized metal, rain collars are installed around the base of the penetration, sitting above the flashing or pipe boot.

Retro Drain Sizing Chart

I.D. of the Existing Drain Leader Platinum Drain Size (O.D.) Fits Into Pipe (I.D.) Large End of Seal (Max. Expansion) Note
2″
1 ¾”
2″
NA
Coupler Required
3″
2 ¾”
2.87″ – 3.25″
3.34″
3″ Drain Seal Required
4″
3 ¾”
3.87″ – 4.12″
4.13″
4″ Drain Seal Required
5″
4 ¾”
4.87″ – 5.25″
5.39″
5″ Drain Seal Required
6″
5 ¾”
5.87″ – 6.12″
6.22″
6″ Drain Seal Required

Galvanized Metal Adjustable Rain Collars


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