I would put condensate pipe on slight downward angle into rainwater pipe.
Boiler condensate pipe into gutter.
Plumbing and central heating replies.
One of my jobs this summer is to move a neighbours condensate from the gutter re run it internally and plumb it into the bath waste.
I thought this was only allowed if the surface drains and sewers were in a combined system so i phoned thames water to check.
The 3 4 inch pipe is sticking out about 2 inch and under ideal condition empty out the condensate through the downspout located about 5 feet away.
The ac installers are doing their work today and just informed me that they installed the condensate line through the gutter.
Almost certainly the biggest problem was caused by the snow in the gutter restricting the condensate pipe.
It was not much fun in the snow trying to melt the condensate pipe in the gutter.
Boiler guy proposes running condensate pipe to the same drain that the gutters go into because the soil stack is hard to reach from the boiler s location.
Condensate should only be discharged into an outside drain if there isnt a means discharging condensate internally eg teeing into a waste pipe from a sink or washbasin due to the risk of freezing if terminated outside and also.
It would be very convenient as the condensate pipe would only be exposed externally by a couple of inches into the downpipe which is just the other side of the wall to the boiler.
I could easily extend the gutter round the corner slightly and run the condensate drain along the extension wall and into the gutter where it would be out of sight and maintenance cost free.
The rainwater leads directly into a drain into which kitchen sink washer water is also dumped.
Installing boiler condensate discharge pipes key 1 boiler 2 visible air break at plug hole alternative connection can be below sink trap 3 75 mm sink basin bath or shower waste trap 4 sink basin bath or shower with integral overflow 5 open end of condensate discharge pipe direct into gully 25 mm min below grating but.
Joining the boiler discharge pipe and condensate pipe crappy 22 sep 2016 in forum.