two-pipeadj.

Etymology: Previous versions of the OED give the stress as: two-ˈpipe.

a. Applied to a system of hot-water heating in which a flow pipe supplies the radiators and a separate return pipe receives water from them.

ΘΚΠ

the world > matter > properties of materials > temperature > heat > heating or making hot > [adjective] > heated or warmed > heated in specific manner (of building or room) > specific system of central heating

one-pipe1888

two-pipe1897

microbore1967

minibore1968

1897 F. Dye Hood's Pract. Treat. Warming Buildings (ed. 3) xviii. 328 The arrangement of pipes is on the ordinary two-pipe principle. A flow and return is carried in different directions almost from a central point.

1970 J. J. Barton Domest. Heating viii. 127 Two basic circuits, the ‘one-pipe’ and the ‘two-pipe’ circuit..are commonly used in small bore heating practice.

b. Applied to a system of plumbing in which separate waste-pipes and soil-pipes are employed.

ΘΚΠ

the world > physical sensation > cleanness and dirtiness > sanitation > provision of sewers > [adjective] > furnished with separate waste and soil pipes

two-pipe1946

1946 E. Molloy Plumbing & Gas-fitting x. 203 The ‘dual’ or ‘two-pipe’ system, in which the removal of excretal matters..is effected by a pipe connected direct to the drain, and the removal of waste water..effected by a second pipe..discharging..over or into a properly trapped gully.

1972 T. A. Tompson Guide Sanitary Engin. Services vii. 226 The two-pipe system of sanitation is rarely used today and has been largely replaced by a more economic design.

This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2019).

单词	two-pipe
释义	two-pipeadj. Etymology: Previous versions of the OED give the stress as: two-ˈpipe. a. Applied to a system of hot-water heating in which a flow pipe supplies the radiators and a separate return pipe receives water from them. ΘΚΠ the world > matter > properties of materials > temperature > heat > heating or making hot > [adjective] > heated or warmed > heated in specific manner (of building or room) > specific system of central heating one-pipe1888 two-pipe1897 microbore1967 minibore1968 1897 F. Dye Hood's Pract. Treat. Warming Buildings (ed. 3) xviii. 328 The arrangement of pipes is on the ordinary two-pipe principle. A flow and return is carried in different directions almost from a central point. 1970 J. J. Barton Domest. Heating viii. 127 Two basic circuits, the ‘one-pipe’ and the ‘two-pipe’ circuit..are commonly used in small bore heating practice. b. Applied to a system of plumbing in which separate waste-pipes and soil-pipes are employed. ΘΚΠ the world > physical sensation > cleanness and dirtiness > sanitation > provision of sewers > [adjective] > furnished with separate waste and soil pipes two-pipe1946 1946 E. Molloy Plumbing & Gas-fitting x. 203 The ‘dual’ or ‘two-pipe’ system, in which the removal of excretal matters..is effected by a pipe connected direct to the drain, and the removal of waste water..effected by a second pipe..discharging..over or into a properly trapped gully. 1972 T. A. Tompson Guide Sanitary Engin. Services vii. 226 The two-pipe system of sanitation is rarely used today and has been largely replaced by a more economic design. This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2019). < adj.1897
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