The Air Separator is a brass horizontal-mount accessory that traps and forces microbubbles out of the system. It reduces noise and improves system efficiency and operation. It features a removable vent head and stainless steel coalescing medium.Reduces noise, improves system efficiency and operationReduces wear and tear on system componentsAllows flow to be directed into either side of the unitPin guided float for smooth operationCorrosion-resistant stainless steel coalescing medium can be removed and cleaned if a blockage should occurIdeal for use with the Webstone expansion tank ProService valve in.3/4 I.D. and 0.875 O.D. in. This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.