I'm replacing my old AC with a new one as well as the duct etc. Having a tough time finding a plastic 6x6x4 wye but plenty of galv metal. Any thoughts on using the metal fitting under the V-Berth to branch from the 6" main flexible insulated duct?
I don't see a real problem using a galvanized fitting in this instance. The air going through the duct I guess is pretty dry. If you wanted to hedge your bets you could paint the fitting. I used this Rustoleum Universal Bonding primer (specifically listed to overpaint galvanized metal) to undercoat my anchor chain before painting colored chain length markings. It worked well.
I was wondering how corrosion resistant the galv metal might be over time knowing the air would be pretty humid when the ac isn't running.
Bill, don't forget condensation! Cold air blowing through pipes/fittings, meeting warm/moist air on outside fitting. Ducts should be insulated!
Quote from: Gregory M on March 14, 2023, 06:20:34 PM
Bill, don't forget condensation! Cold air blowing through pipes/fittings, meeting warm/moist air on outside fitting. Ducts should be insulated!
I'll be using insulated flex duct and I intend to insulate the wye as well.
Suremarineservice.com
How about this one MSI HY664
https://marinepartssource.com/6-x-6-x-4-air-divider-hose-y-msi-hy664
https://www.suremarineservice.com/Cool/Air-Divider-Hose-Y-Wye/HY664.html
Thanks Marc!
Steep price but, no worries about corrosion, and this is a big plus, it includes an adjustable diverter! Shipping was an unreasonable $32 to boot but, it's the only place that has one so, I ordered one.
When it's 100 degrees and humid outside this Summer, the price won't seem so extreme. 8)
Especially on the Chesapeake where it gets pretty steamy in august!