Genuine Acorn 2590-064-001 H & C Air Control Metering Valve 2.5 GPM.
Acorn suggested replacement: Acorn 2590-067-001 H&C Metering 2.0 GPM Valve
Quality Plumbing Supply is a proud distributor of Acorn products. Most orders usually ship the same day and we offer free shipping for orders over $99!