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The waste water backs up into the dishwasher when sink is plugged

\015 The waste water backs up into the dishwasher when the sink drain appears to be intermittently plugged; there is no syphon break installed.\015

Answers :

Dishwasher manufacturers recommend a syphon break be fitted - but usually there is not a problem if your sink has an overflow pipe incorporated.
\015\012
\015\012You have a partially blocked drain - causing wastewater to flow into the dishwasher instead.
\015\012
\015\012Use 1/2 a cup of caustic soda or proprietary drain cleaner down the sink drain. Add about a pint of water, and leave overnight.
\015\012Next morning pour a full boiling kettle down the drain which should move things on and clear the drain.
\015\012You may have to repeat this process once, but is preferable to taking your pipework apart - which is next if this does not clear it.
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The waste water backs up into the dishwasher when sink is plugged


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