| 摘要 |
A pipe loop (10) for fitting a water meter (12) to a plumbing installation includes a pipe coupling having an adapter (20) with an inlet (22) and an outlet (24) and being adapted to be connected in a straight length of pipe (14) in the plumbing installation, the adapter (20) defines a seat formation (26) between the inlet (22) and outlet (24), the seat formation (26) having an axis perpendicular to the axis of the inlet (22) and outlet (24). A body portion (32) is screw threadedly connected to the adapter (20), the body portion defining a pair of coaxially radially separated tubular members (36, 42), the inner tubular member (42) extending beyond the outer tubular member (36) into sealing engagement with the seat formulation (26). The outer tubular member (36) has radial apertures (48) and an outer water jacket (50) is mounted around the outer tubular member (36), so that it is rotatable with respect thereto, the water jacket (50) being sealed between the body member (32) and the adapter. The water meter (12) is connected at one side to the inner tubular member (42) and at the other side to the water jacket (50), to complete the loop (10).
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