Expansion Joint Bolt Circle Diameter 14 1/4 in Bolt Hole Size 1 in Bolt Hole Threading Unthreaded Burst Pressure 853 psi Compression Distance 2 3/8 in Connection Type Flanged Expansion Distance 1 3/8 in Expansion Joint Type Double Bulb Features Absorbs Water Pulsation and Minimizes Water Hammering Applicable for Suction and Delivery (Discharge) Designed for Greater Compression Elongation and Angular Movement than the Single Sphere Expansion Joint Flange Diameter 16 in