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Frequently Asked Questions
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Q. Why does my Flo-Chek leak by?

Q. Why is my Flo-Chek or MPV noisy?

Q. Why does my hot water circulate when my Taco pump is off?

Q. My house has five zones, each with its own circulator. Hot water is passing into zones that are not calling for heat. Do I have some defective circulators?

Q. I have a 3-zone residential system with a 219 Flo-Chek on each zone. The manual override thumb screws are all open ~2 turns. Should these be fully closed?