The NEOPERL PCA Perlator 2.2 GPM Regular male 15/16 in. 27 is pressure compensating. The pressure compensating design helps to maintain a constant and comfortable water flow regardless of pressure fluctuations. This aerator also features an anti-clogging yellow dome screen that filters sediment. The Patented single piece construction is virtually unbreakable and lime resistant. The laminar feature provides a constant crystal-clear stream non-aerated, which prevents airborne bacteria from entering the water through air contamination. Solid brass housing with a chrome finish. Due to state regulations this item is not available in California.Pressure compensatingLaminar streamSolid brass with chrome finishLead freeHelps to reduce bacterial contamination into the waterANSI/NSF 61, ASME A112.18.1M, CSA B125, AB1953, S-152