| 摘要 |
<p>A plumbing sealing arrangement (10) comprises a passageway having an inlet (14) adapted to be connected to a waste outlet (16) and an outlet adapted to be connected to a soil stack, a one way valve (18) located between the passageway inlet and outlet, the one way valve adapted to permit the passage of fluid through the passageway in one direction only from the inlet to the outlet and a trap (20) arranged to permit a liquid seal to be formed between the passageway inlet and the passageway outlet. In normal use, at least a portion of the one way valve is immersed in the liquid seal and in a described embodiment, an outlet of the valve is immersed in the liquid seal.</p> |
