Originally Posted by Al - K4GLU
Is there any product that can safely be used on the threads of drinking hose connectors...
the same products used to maintain tank drain valves work great on hose connectors...
aerosal spray or grease versions.
these are commonly used as O ring lubricants in drinking water systems.
web search 'food grade silicone
' for a lot of vendors.
the sprays will collect less grit than the grease,
but a thin film of grease will last much longer.
plumber's grease from gunk is a common brand available.
the problem is typically galvanic corrosion mixed with mineral deposits.
switching all the connectors to brass or steel or nylon helps too,
but 1 can of spray and 1 tiny tub of grease will last for years.
the spray is used with window seals, door gaskets and lots of other bits around the trailer.