Help!! My mini poodle keeps pee'ing everywhere

Hi any advice here would be gratefully recieved. We have recently acquired a 6 month old male mini poodle as a playmate for charlie our 12 month old mini. He is a stunning dog with an amazing pedigree. We saw him advertised on a preloved pet site and fell in love. He has been showed in the past and has done a lot of obidence work. He seems perfect apart from he keeps wee'ing in our kitchen. This has happened several times and with quite a volume! This in itself is not a problem as we know he is a new dog and under stress and also still a pup, however we were informed by previous owners that he was crate trained ahd had been sleeping in the crate for 8 hours at a time but after leaving him for 3 hours in the crate he has saturated it and himself. We are unsure if this is just a settling thing or a sign of something more significant. Overnight he is fine in our bedroom (i know!). he has not been reprimanded for this as we are aware that his world has just been turned upside down. if anyone has any advice on techniques they would be gratefully recieved.