ONTARIO, CALIFORNIA — What’s behind the wall and can it get you in trouble? If it’s an old shower valve, it might. That was one of the many issues debated by members of the International Association of Plumbing & Mechanical Officials Green Technical Committee meeting here in August. Showerheads and shower valves are not installed together. Typically the shower valve is put in when the house is built and may only be changed once or twice during remodeling. The ...

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