Flange Bolt Hole Size 0.5 in Compatible Pipe Size 1 1/4 in Compatible with Brand Bell and Gossett Compatible with Grainger Part Number 3NVG4 4JA83 4JA84 4RD04 4YM17 Compatible with Series 100 PR Compatible with Series Family 100 PR 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 103251 103267 103400 1BL001 1BL012 Compatible with Pump Type In-Line Circulating Pumps