The new PDQ sillcock offers significant savings to installation time and cost, according to Sioux Chief. The PDQ sillcock is designed to install easily onto any ½" nominal CTS tubing. The unique design allows contractors to bracket the supply tube securely behind the wall, then cut and connect the sillcock from outside the building — at finish. The quarter-turn T-handle is easy to grip and the wide mounting flange allows for solid installations. The sillcock is also designed to allow easy removal or replacement, if necessary. Each sillcock is individually boxed and includes installation (and removal) instructions. Sioux Chief.