Compensators H Series Available MMT (male thread), HWE (weld end), FLG (flanged ends). 2″ inches of compression, 1/2″ extension (2-1/2″ total stroke) HB Series With female copper sweat ends 2″ inches of compression, 1/2″ extension (2-1/2″ total stroke) Pipe Thermal Expansion Chart Compensators Designed to absorb straight axial compression and extension. Used in building riser systems to compensate for thermal expansion and concrete shrinkage, they can be installed in horizontal piping as well as vertical. Note: Proper guiding and anchoring are critical! Contact Us