1.5" MPT Threaded Male Tail Adaptor x 2" Spigot / 1.5" Socket

1.5" MPT threaded adaptor with 1.5" / 40mm socket & 2" / 50mm Spigot 

This fitting could be used in numerous applications including alteration to particular pump plumbing/relocation.

The thread suits the following pump unions (union O-ring seats against the flat suface of this fitting):
Aquaflo circ-master CMCP
Balboa Ultima circ pump
LX JA, TDA, EA, DH1.0 series pumps 
Xylem E-14 circ pump 
Triflo bath pumps

Fits LX H20 and H30 series 1.5" heater unions