That one tee on the hot is bull headed, assuming water comes up from the slab. It's not recommended to bull head tees, basically water comes from the slab and once it hits the tee it's forced to go both ways, whereas if you put a 90 where the tee is then tee off after the 90 water isn't being forced both ways. You can do it but its a better practice to not bull head your tees in any plumbing or gas. You could have future issues with getting a pin hole leak on the tee. Not saying it will just it could be a possibility.