Flange Kits Bolt Hole Size 2.5 in Compatible Pipe Size 3 in Compatible with Brand Armstrong Compatible with Series E.2 S H Compatible with Series Family E.2 S H Flange to Pipe Connection Type FNPT For Use With Potable Systems No Flange Type Standard Number of Mounting Holes 2 Compatible with Manufacturer Model Number E28.2HT E29.2HT E30.2HT - 3 in E32.2HT - 3 in E33.2HT - 3 in S-45 S-46 S-57 Compatible with Pump Type In-Line Circulating Pumps Flange Gasket Material EPDM