The Alert model 40510A-AD is a phase separation detecting and particulate removing filter with 10 micron cellulose media which is recommended for gasoline and alcohol blended fuels when a higher cleanliness level is required. The 40510A-AD utilizes a standard 1.5 in. -16UNF mounting thread 1 in. flow required for high flow fuel dispensers. Maximum Operating Pressure 50 PSID.