The Many Parts of a Toilet (3 Diagrams: Tank, Toilet & Plumbing)
PFAAV20 - PROFLO® - Toilet Air Admittance Valve - 20 Dfu AAV with 1-1/2-2 PVC Adapter Air Admittance Valve - Plastic - 1-1/2in. x 2in. - White - CA of 6
American Standard Cadet 3 Linen Elongated Chair Height 2-piece Toilet 12-in Rough-In (ADA Compliant) in the Toilets department at Lowes.com