| 摘要 |
A pressure flush control system comprises a hose connected at one end to a water supply and an inflatable bag connected to the other end of the hose, so that water from the water supply flows through the hose and into the bag to inflate the bag after the hose and bag are inserted into a drain pipe to keep the system mounted in the pipe during use. There is a second hose extending through the bag from an input side to an output side. The second hose is connected on the input side to a pressurized source of water, so that water from the pressurized source flows through the second hose to the output side under high pressure to clean the walls of the pipe. There is a third hose extending through the bag from the input side to the output side so that water exiting from the second hose returns through the third hose to the input side of the bag. There is also a valve connected to the third hose for closing the third hose to prevent water flow through the third hose. This allows water pressure to build up on the output side of the bag to clear clogs in the pipe.
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