A.Y. McDonald 106 Casing Adapter Vertical for all 1000 Series. Slips onto the well casing and is secured by tightening the two bolts and nuts. Thick rubber compression gasket eliminates threading or welding of casing. 1 1/4" X 1" face bushing or reducing nipple required to permit use of 1" drop pipe. Adapters and flanges bolt directly to the base of all 1000 and 1000SW Series pumps and 8200, 8600 and 1500 Series. Sizes available 2".