Check the listing for details. PPH Welding Machine PE Pipeline Socket Fixture PPR Hot Melt Machine Socket Rack. Condition: New. Listed at 552.84 USD. PPR socket clamp, PPR, PR, PPH can be used, elbow tee can be directly socketed, the machine is light in weight and small in size, the base can be detached, convenient and practical to carry. 1 X PPR Socket Fixture.