Hot water from Worcester Bosch Greenstar30i combi

[Jaybrian]

I have a newly installed Worcester Bosch greenstar 30i combi boiler. When i have the downstairs hot tap fully open, the upstairs hot water bath tap has very little flow. Is this a boiler problem, or is it down to the water pipe configuration, ie the downstairs tap is the easiest path for the hot water to follow.

 

[ShaunCorbs]

You won’t run two outlets with a combi one will always suffer

 

[Deleted member 120897]

Yep, pretty much answered your on question. Water is lazy and will take the easiest path