Corr/Guard Special Gas Vent Double Wall 3''/5'' Vertical Drain Section - 3CGVDS - Car Audio They offer superior corrosion resistance

They offer superior corrosion resistance to yellow brass and the material's relative softness allows for easy installation and a tight seal

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Corr/Guard Special Gas Vent Double Wall 3''/5'' Vertical Drain Section - 3CGVDS - Car Audio They offer superior corrosion resistanceThis concentric vent pipe includes a port to drain condensate, a corrosive liquid by product of gas combustion. The pipe has 3" inner pipe diameter and 5" outer pipe diameter. High quality, stainless steel vent. The super ferritic stainless steel construction has the durability to last for many years. Vertical Drain Section 3 In. 5 In Hvac Replacement Part CorrGuard 3CGVDS Rheem Ruud Replacement Vertical Drain Section Compatible with Mid Efficiency