|Good, simple design, if a little expensive.
by: A. Butler ✔Verified Buyer from: Ann Arbor, MI on: November 9, 2010
|Bought and installed one of these through drywall in a bathroom wall a couple weeks ago.
Item includes three pieces total: 1) a flange with three screw holes that fits through the hole in the wall and includes a rubber gasket on the back to fit snugly into the duct
|Is this a check valve that only allows airflow in one direction or is this just a register for the inlet to a vent fan. I have heard the term "air inlet valve" in plumbing to refer to a valve that allows air into but not out of a sewage drain. I am looking for a large (8") air check valve that only allows flow in one direction. - Asked about product SL-BOR-200
|SL-BOR-200 is an adjustable valve that will vary the air flow. A backdraft damper will allow
the air to flow in but 1 direction. The 8" backdraft damper is needed would be SL-CAR200: Click here
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