Metraflex Compensators are perfect for pipe diameters up to 4” when axial movement is required due to thermal expansion. They are stocked with both 2” and 3” compression ability in flanged, weld, thread, and sweat ends. For greater movements and larger diameters, check our Metragator expansion joints. Bellows . . . . . . . . . . . . . . . . . . . .