| 摘要 |
An apparatus for continuously controlling fluid flow in a sewer conduit, comprising: a) moisture sensors detecting levels of fluid in this conduit; b) an inflatable bladder, mounted in the sewer conduit Y-type clean-out duct for releasably sealing in fluid tight fashion a section of the sewer conduit; an air compressor, for inflating the bladder; and a control b ox including a CPU, sensitive to the moisture sensor and actuating the air compressor responsive ly to conduit fluid level conditions reaching beyond a preset threshold value. The performance of the apparatus is independent of the speed of fluid flow in the sewer conduit.
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