Abstract: A stationary jack stand for supporting such things as the draw bar end of a trailer has a base, four struts and a cap, capable of ready assembly and disassembly. On the base are four recesses into which are inserted the lower ends of the respective struts. The cap has four pockets much closer together than those of the base into which upper ends of the respective struts are slid. When a weight is applied to the top of the cap all parts remain interlocked together. To disassemble, the top is lifted free from the struts and they in turn can be lifted free of the recesses in the base.

Abstract: A composite seal for joining a down flow drain pipe to a shower pan has a drain fitting provided with a tapered rim overlying the shower pan and a packing nut for holding it in place. A flanged lower portion of the fitting forms an annular pocket around the drain pipe in which a series of three rings are stacked. The center ring has normally diverging annular sections which are forced together between the pipe and the flanged portion of the fitting thereby to seal the assembly.