Waste sink outlet blockage

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Wings

Original Poster:

5,815 posts

216 months

Thursday 17th January 2019
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Block of flats, blockage in first floor flat's sink, washing machine waste pipe. The waste pipe consists of four right angle elbows, three 32mm compression elbows and one 32mm push fit elbow, with a horizontal nine foot straight 32mm run.

The waste outlet runs under floorboards to the outside of the building. I believe the blockage is caused through washing powder solidifying, and whilst the waste water empties from the sink tap, when the washing machine is used, water cascades into the flat, and the flats below.

I do not believe drain unblocking chemicals are going to have any effect, I have tried rodding from outside to inside, but may be pushing blockage further in towards elbow. Tomorrow will attempt using wet blower vacuum cleaner, if that fails any suggestions please.

Wings

Original Poster:

5,815 posts

216 months

Friday 18th January 2019
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Managed to unblock by reducing vacuum cleaner hose, by attaching 22mm tubing to wet and dry vacuum cleaner.