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Simple, straightforward and low shipping rates for these nipple and screw extractors.
Q. "Why are shower nipples made thinner than normal brass or galvanized pipe?"
A. They can be made thin for a number of reasons. The manufacturers have to meet certain pressure requirements, but water pressure is only present when the shower is on and water normally flows through them and out through the shower head, not putting any real constant pressure in the shower arm. Shower head shut-off valves are designed to drip some water through them so the hot and cold water will not mix at the shower valve itself, again relieving any real pressure build-up in the shower arm. So manufacturers can meet minimal pressure requirements and save money by using less material.
Q. "Why won't the 'cam style' internal pipe wrench work for shower arms?"
A. The "cam" style internal pipe wrench works by swiveling the cam as it is turned inside the nipple until it wedges the cam and the non-swiveling part of the wrench against the inside of the nipple, locking it into place. Since shower arms are normally made out of a very thin walled brass pipe, they have a larger inside diameter than normal steel or brass pipe. The swiveling cam will not normally be able to reach the inside wall of the pipe enough to wedge itself and grip the internal pipe wall for proper locking action and removal.
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