Shower valve issue in downstairs restroom not getting hot. Ace Pelizon Plumbing found downstairs restroom not getting hot water with new tankless install due to a crossover in shower valve with hot and cold. Company that makes shower valve is no longer in business. Spoke to customers about issues and went with complete replacement of Moen shower valve. Tested for leaks and function, shower is now hot. When bathtub is turned on the volume of water is pulling the hot from other fixtures. All other plumbing in home in good working condition.