TRINITY designs and manufactures its own brand of LINERS, VALVES, and PISTON ASSEMBLIES for nearly every model of FMC, Kerr, Weatherford, and Myers-Aplex pump ever mounted on a production series horizontal directional drilling rig.  These spare parts meet or exceed OEM specifications. We also manufacture many other HDD related spare parts for larger stand-alone pumping systems.  The savings for owners and operators of HDD pumps are significant.  If we don’t have the part you are looking for, we are interested in hearing about it!

For a detailed listing of our HDD spare parts, go to

Blender Pump Spare Parts and Rebuild Kits

To support our blender pump business, we supply a complete line of high-chrome and our extreme wear resistant TRILOY enhanced wear parts for all standard 14x12x22 blender pumps. These parts are designed to rebuild NOV Mission 14x12x22 Magnum XP and MCM XL 12x14x22 single stage pumps, as well as our own blender pumps.  Contact our blender pump distributors in your area for these parts.