Worcester leaking condensate

[Kevin B]

I ve been looking at a Worcester 30cdi conventional which periodically leaks. Ive checked the trap and its clean, the trap has got the flexi drain and a 1/4 inch hose. Can anyone tell me what the two drain outlets are for? when I fill the trap under the sink the 1/4 hose spits out water, but the flexi hose also runs water. It seems as if the water is overfilling the trap and entering back into the boiler and leaking from within, any thoughts would be appreciated.

 

[gasmarc]

well it sounds like a trap issue unless the flue seal is faulty

 

[aggis]

Have had to change O ring that seals trap to H/exch