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As long as the installer doesn't do something so daft as to push the condensate pipe right through the boss connection and into the bore of the downpipe it'll not make blockages any more likely.secondly with the condensation pipe penetrating the down pipe will it be more prone to blocking
Agree. The plot thickens. The first post suggested the neighbour was merely running a pipe into his or her own gutter that discharges into the OP's downpipe, but this does not agree with what is said in subsequent posts.I would like to see how they have joined the condensate pipe into the downpipe. You being concerned about possible blockages makes me think they have just drilled a hole in the side of the downpipe and pushed it into the hole actually penetrating the downpipe and restricting the bore of the pipe. It should be fitted into a suitable fitting designed to take the condensate pipe without restricting the downpipe. Any chance of a picture. It needs to be done right as gas safe are very strict on condensate runs and how they are terminated.
Would you actually reduce to 30mm and can you even get a 30mm reducer for rainwater pipe?Thanks for the picture. You are right to be concerned that is not the correct way to terminate a condensate pipe and is not acceptable and will compromise the bore of the down pipe leading to be prone to blockage. A tee joint should have been cut into the down pipe with a square to round 30mm reducer fitted to the tee joint. Also the external run of 30mm condensate should be insulated. So no this is not to regs and requires doing properly or reporting or both.
Another reason for doing it this way is to consider what happens if the downpipe gets blocked below the point of the condensate entry. The entire pipe can fill with water to a level above the boiler...The impression I got from a display on the wall in a Worcester Bosch training centre is that the 'correct' way is to have the condensate pipe dropping into a hopper or socket (one size larger than the condensate pipe) coming off a tee such that there was an air break at the end of the condensate pipe and no possibility of rainwater inducing a vacuum on the condensate pipe.
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