waste disposal unit

silvercar

Does removing these things mean a new sink? The plug hole is particularly wide where ours feeds into the defunct waste disposal, so I’ve never got around to having it removed.

Bendy_House

'Standard' ones don't - they'll fit in most sink waste holes which take the most common 'basket' strainer. They're around 75mm wide, or something.

I dare say there are larger sizes of both waste hole and waste disposal units out there.

BUFF

Bendy_House said:

'Standard' ones don't - they'll fit in most sink waste holes which take the most common 'basket' strainer. They're around 75mm wide, or something.

I dare say there are larger sizes of both waste hole and waste disposal units out there.

Certainly 90mm exists

dave030445

Section62 said:

dave030445 said:

Hi its tripping the mcb.

Can you confirm that is definitely a MCB rather than RCBO (or RCD)?

What current rating is it?

Hi I can confirm Its definitely a MCB

Section62

dave030445 said:

Hi I can confirm Its definitely a MCB

In which case you are looking at an overcurrent situation only.

One possible cause of overcurrent with single-phase motors is if they are in (or near) a stalled condition.  Although normally I'd expect that to be dealt with by protection devices on the unit rather than it tripping the circuit... however if the rating of the MCB is low or is very sensitive it might trip before the waste unit's protection has a chance to kick in.

Assuming you've checked there's nothing else on the circuit which could be causing an overcurrent situation.


So, if the unit doesn't appear to do anything other than trip the MCB I'd want to rule out a blockage or something which is preventing rotation of the motor.

Obviously water, electric and grinding blades are an extremely dangerous combination.  So make absolutely sure the unit is isolated before you do any further investigation.  That done, try and find and follow the manufacturer's instructions as to how to deal with blockages and jams, and ensuring the mechanism is turning freely.

If you are able to (safely) confirm free rotation then I think you need to treat the unit as dead and likely not economically repairable.