Grant Almirall, playing the charming Don Lockwood, gets just as saturated as Gene Kelly did when the tap-dancing star made Hollywood history performing his love-struck routine back in 1952.
Bringing the beloved character back to life was a "huge responsibility" for the South African actor, Mr Kupferburger said, but so was getting the water-works right.
Of course, the Civic itself won't be having to take out an insurance claim for water damage, because a giant plastic membrane put in place by the company effectively turns the stage into a swimming pool without any impact on the theatre.
The special effects include rain that sprays down from above and a further 4000 litres which floods up from cracks below, all of it draining back into a large reservoir.
And just to ensure the water stays clean both times it's used during the show a treatment plant filters it to prevent bacteria developing.
Mr Kupferburger said the musical had already proven a hit with show-goers at Wellington's St James Theatre - particularly those in the splash seats.
"By the end of the show, they really feel part of it."
The production, which opened last night, runs in Auckland at the Civic until Sunday May 24.