Foaming has occurred in the boiler and has been drawn into the column.
To avoid this;
- Ensure the wash is properly fermented (FG should be approximately 0.990 and stable for at least 2 days)
- Double or start using distilling conditioner
- Do not overfill the boiler
- Use ceramic boil enhancers/saddles
Ensure you are distilling in a ventilated room (inside). Ensure there are no drafts or wind as the T500 is very sensitive to air movement.