the Aerix+ 2921-S comes standard with an intelligent LED display to indicate when to empty the water try and change the HEPA filter

Type: 304 Stainless Steel

and allergens in replaceable bags that are discarded when full

Bradley 119-114 Valve Stem Replacement Part

Bradley S65-117P Terreon Graph Repair Kit Replacement Part

Cash Valve Pressure Regulator, Bronze, 20 to 100 psi - 20251-0060 Nominal Size-33.125" X 18.125" X 1.25" the Aerix+ 2921-S comes standardThis PENTAIR CASH VALVE single seated, spring loaded, direct acting, diaphragm type valve helps reduce high initial inlet pressure; maintains pressure within reasonably close limits. FNPT connections.