Hello everyone!

I am building a shed around my pool equipment and will be direct venting the exhaust through the roof from the pool heater. I bought the Jandy adapter kit (from Jandy) but it does include pipe or flashing kit for the roof. Does anyone know where I can buy (online) 9 inch duct and a flash kit? Any help is appreciated. This seems to be a specialty size as most websites and my local hardware stores only carry 8" or 10".

Thanks again
John