Marketing InformationProLock™ push-fit fittings make joining PE-RT, PEX, copper and CPVC pipe to NPT threads easy. They incorporate Twist-to-Lock feature for added security. Fast and easy-to-use, no soldering, glue or clamps. Approved for behind-the-wall applications and can be used for permanent installations. Ideal for work in tight spaces. Can be disconnected without damage to tubing.