I have a gas tankless hot water unit. I had a plumber come in to do rough-ins in the downstairs bathroom as I am finishing my basement. We shut off the main water line and drained to tie the lines in for the bathroom. Now I only have hot water in a couples sinks in the house. Neither tub has hot water but the sinks in those bathrooms do. The kitchen sink doesn't have hot water. The hot water line on the tankless system gets hot when touching it so where is the hot water for the other taps?

I would call the plumber to come and see if have done some thing wrong, Thanks.

John