How To Connect Bath Fan Exhaust Pipe Fittings - HVAC - DIY Chatroom Home Improvement Forum

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Old 04-03-2012, 01:08 PM   #1
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how to connect bath fan exhaust pipe fittings

what are the proper/recommended ways to connect fart fan exhaust pipe fittings, 3 and 4":

1. just aluminum tape is fine
2. clamp rings
3. 1/2" machine screws hex head
4. something else
5. some combination of 1-4 above

this is a concern of relatively low relevance as the application seems kind of low duty but i meant to ask for advice anyway.



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Old 04-03-2012, 01:13 PM   #2
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I'm interested to see the answers, as I've wondered this myself, and have a fan I will be installing in the next week or so.

In the past I've used mastic and 1/2 inch sheet metal screws (not machine screws), and foil tape on top. That's kinda like holding up your pants with a belt, suspenders, and glue, but I'm sure it will never fail!

These are mastics


Last edited by M3 Pete; 04-03-2012 at 01:17 PM.
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