In message , j west +++
writes
hi, whilst renewing the bath outlet pipe, i noticed in the drain (used by
the washing machine) a very large congealed chunk of white crumbley powdery
stuff. i'm pretty sure it is formed from unused washing powder that has
passed through our washing machine (AEG oko-lavamat 610). Since it has the
same texture and appearance as the lumps you find in the washing powder
packet. ie persil colour care. the powder is put in a plastic ball and
placed in the machine. but large chunks of stuff in the drain, cannot be
right?

anyone any idea what's going on here please?

or could it be Calgon? Before fitting an ion-exchange water softener I
used to find adding Calgon tabs to the drum of our Bosch machine often
left lumps of goo at the end.

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dave @ stejonda