Rinnai 223177PP 21-Inch Condensing Horizontal Termination Kit

Rinnai 223177PP 21" Standard Termination Kit - For Horizontal TerminationRinnai 223177PP 21" Standard Termination Kit - For Horizontal Termination Features:; Engineered especially for gas appliance venting; Positive fit and lock allows for installation assurance; Two layers of pipe equals two layers of protection; Seals at every joint expand and contract with weather and temperature changes, so there's no flexing or cracking in the venting; No flammable, messy or harmful glues, cements, or solvents are used; Zero clearance to combustibles; Single penetration through wall for both intake and exhaust