Has everyone seen James Kantorowicz's Solar Attic pool heater. Neat idea! As a lower tech approach has anyone tried using a couple hundred feet of flex running around in the crawl space. It seems like it would work.
As VGB act is going to be implemented towards the end of this month, does anyone know of any spa drains (bulkhead type fitting) that are compliant with ANSI A112.19.8-2007 standard. Waterway has a 640-3630-V that they say has been approved. Perhaps t
