| 摘要 |
601244 A plumbing adaptor fitting (51) is for use in the installation of instantaneous gas hot water heaters (not shown). The adaptor fitting has pipe couplings (55) at one end and a releasably retained loose nut (67) at the other end. A bore (70) extends between the loose nut and the pipe coupling. The adaptor fitting has no joins or joints, facilitates both the installation and the replacement of such heaters, and is inexpensive to manufacture. The loose nut (67) is releasably retained on the fitting by means of a flange (71) with machined opposite side edges. A valve (not shown), having only a single manufactured joint and a releasably retained loose nut (67) and retaining flange (71), is also disclosed. |
