1. Discharge pipes directly take pollutants away from the plant into the river.

2. Shut off valve for the discharge pipe.

3. Open gate valve of the liquid discharge pipe fully.

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4. A by-pass capillary tube was added on the discharge pipe behind the four-way valve and a tube was added in an accumulator in a heat pump system to solve the problem.

5. Since the material of atmospheric condenser, barometric discharge pipe, pump casing of follow-up water ring vacuum pump, impeller, and moisture tank was upgraded and anticorrosive p...

6. Discharge pipe take pollutant away from the coastal area into the sea.

7. Reciprocating pump discharge pipe must be before the start of the valve to open.

8. A physical air gap must be maintained between the discharge pipe and the drain.

9. The water-plugging device of large diameter tube used for water-finding comprises a water-plugging gas bag arranged circulating the frame, an inlet pipe or a discharge pipe is arranged in the frame.

10. A physical air gap must be maintained between the discharge pipe and the drain or sump.