Copper pipe bushing

In cold climates, plumbing vent stacks are often blocked by hoar frost, causing sewer gases to back up into the home and drains to slow. A common DIY solution is the "sewer skewer"—a copper pipe insert that uses thermal conductivity to keep the vent clear. How the Sewer Skewer System WorksHeat Transfer: Copper is an exceptional thermal conductor. The skewer reaches deep into the warmer part of the vent stack, drawing heat from rising sewer gases and internal house air up toward the roofline.The T-Top Design: A copper T-fitting at the top of the skewer serves two primary functions:Maximized Surface Area: The horizontal wings of the "T" act as a heat exchanger, conducting warmth across the diameter of the 4" ABS pipe to melt ice caps evenly.Safety Catch: The "T" shape, often supported by a custom bushing, prevents the copper pipe from falling down into the main sewer line.Solar Absorption: Painting the exposed copper flat black is a critical enhancement. Darke