
Blocked condensate pipe - food waste likely problem.
I've a new build where the condensate pipe runs through the wall in the kitchen and then meets the waste pipe under the sink. Last year we had someone push through all the accumulated gunk out of this, clearing the blockage. We're having the same problem this year with the boiler's condensate trap filling up causing an ignition lockout.
What would the best way be to tackle this fitting, especially if I'd need to take it out and clear out more gunk again?
What chemicals could I pour through the pipe to dissolve any gunk?