I agree i use Smitty and he shuts down and opens up. I have forced hot water heat so all rooms area concern. I use a professional rather than guess and with him its worked for 10 years. Prior to that i used a plumber who is now retired so don't need to mention his name but he didnt do it right and we have three years of leakage in the ceiling. Smitty so far has been perfect
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it's tough to make predictions specially about the future
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