What is a condensate trap/discharge pipe?
The Greenstar range of gas and oil boilers dispose of their condensate by means of a syphonic trap, which discharges a given quantity of condensate fluid at a time to the properties drainage system/pipe work. The syphonic trap is important because if the condense fluid were allowed to drip continuously to the drain at the rate it was being produced, then there would be an increased risk of any externally run condense discharge pipe freezing.