【Daily Question】Utilities - Water Supply and Drainage - 20200522

2020-05-22View Original

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This post was last edited by hesonchang214 on 2020-5-25 11:35 to prevent water pollution. When the air gap between the outlet of the filling or make-up water pipes for swimming pools, water play pools, contact tanks, ornamental water features, circulating cooling water sumps, etc., and the overflow level is less than 2.5 times the diameter of the outlet pipe, the measure to be taken is ( ). A. Install a float valve on the water surface of the tank. B. Install a check valve on the filling (replenishment) pipe. C. Install a gate valve on the filling (replenishment) pipe. D. Install an anti-backflow device on the filling (replenishment) pipe. Answer: D

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【Daily Question】Utilities - Water Supply and Drainage - 20200522

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