Marketing InformationSpears® repair couplings provide a variety of system repair and alteration solutions. Use socket x socket configurations for quick pipe damage repair, can also be used as a short-stroke expansion joint to compensate for thermal expansion and contraction. Spigot x socket configurations are excellent for lateral and riser add-ons, damaged fitting replacement or for installing valves in existing piping systems. Simply cut coupling from socket shaft end to function as a spigot or add a coupling to spigot shaft end for socket connections.