jayc89 Posted January 18 Share Posted January 18 A couple of my duct runs are too short, at the distribution box end. I plan on getting a couple of straight couplers, like these - https://www.paulheatrecovery.co.uk/product/connector-for-90mm-semi-rigid-ducting/ - should I use anything else when using these; an acrylic sealant within the sleeve and airtight tape externally? Link to comment Share on other sites More sharing options...
Conor Posted January 18 Share Posted January 18 I used both, sealant and tape. But try and find ones with rubber gaskets, so much handier. Link to comment Share on other sites More sharing options...
Savage87 Posted January 18 Share Posted January 18 whenever I used couplers or elbows on semi rigid ducts, they came with rubber gaskets on the inside and I used acrylic sealant and aluminum foil tape, a bit of overkill but it works. Link to comment Share on other sites More sharing options...
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