Clamp on pitless adapters clamp around the well casing. They have a neoprene gasket for sealing the housing to the outside of the well casing and is held in place with stainless steel straps and hardware.
25 Whaley Avenue
P.O. Box 310
N0K 1M0 Canada
Boshart Industries LLC
3601 Woodpark Blvd. Charlotte, NC 2820 USA