Abstract: A protective insulating sleeve is a two part construction with a pair of mating semi-cylindrical halves. Each semi-cylindrical half includes a semi-cylindrical metal sleeve surrounded by a semi-cylindrical plastic sleeve. The semi-cylindrical plastic sleeve has a groove formed in one exposed surface thereof and extending lengthwise along it. The semi-cylindrical metal sleeve extends outward past the semi-cylindrical plastic sleeve to form a tongue which mates with the groove in the other mating semi-cylindrical half such that the mated halves can be inserted into a bore in a stud or joist to receive a pipe or conduit extending through that stud or joist. Cushioning ribs are provided to dampen noise emanating from the pipe or conduit. The interlocked protective insulating sleeve thus serves the plural function of supporting and insulating the pipe or conduit and surrounding it with the metal sleeve to protect it from penetration by nails, screws or other fasteners driven into the stud or joist.

Abstract: A universal pipe bracket includes, at one end, an integral mounting flange portion with a pair of through bores positioned to receive mounting screws for attachment of the pipe bracket to a vertical surface, such as a wall stud. A four sided elongate bracket portion is attached to and extends outward from the flange portion and is designed to accommodate clamps which support, or are used for supporting the bracket by, pipes running both vertically and horizontally. The bracket can also be used in a trapeze support configuration.

Abstract: A seamless water hammer arrester is formed of an elongate chamber with an entirely seamless upper closed end and a lower end connectable to a water pipe. A piston is emplaced in the chamber and is movable up and down therein to dampen water hammer. The piston defines an upper chamber portion in the chamber which has a super atmospheric charge of gas providing a downward pressure on the piston. The piston is of a liquid and gas impervious, lightweight synthetic material and has at least three O-ring seals therearound to maintain a substantially leak free separation of the upper and lower chamber portions. The piston is preferably domed to accord to the shape of the chamber upper end and hollow to collect sediment when used in a upside down orientation.