What is this red stuff?

[Wayne B. Wilson]

http://www.youtube.com/watch?v=xP3xiLKJ9_4

A famous Canadain Man uses of stuff he has created

[Gary Reecher]

Something looks wrong. Two vent pipes the same size going into the main stack the same size indicates possible undersizing of the vent. This needs to be written up for HVAC company to do a sizing check on it.

[Mark Nahrgang]

Originally Posted by Gary Reecher

Something looks wrong. Two vent pipes the same size going into the main stack the same size indicates possible undersizing of the vent. This needs to be written up for HVAC company to do a sizing check on it.

Not the same size... 3 inch water heater on top, 4 inch furnace on bottom. Very normal sizes...