r25classic waste system

[willyk]

i'am winterizing my recently purchased boat i added antifreeze to holding tank turned on 12v breaker for holding tank up front and can't get pump to run checked fuses, is there a separate switch for macerator pump? also the manual says there is a check valve in the potable h20 line from tank before pump do you think they hid it?

 

[scross]

You may want to study the diagrams in your owners manual.
I’m assuming by “holding tank” you are referring to the black water tank and not the fresh water tank. Obviously big difference between the two. You can add antifreeze to the black water tank directly through the waste pump out port in the cockpit gunwale.
You can add antifreeze to the toilet supply line through the main sea strainer. Just flush toilet while person #2 keeps sea strainer full of antifreeze with the engine off of course. Continue filling/flushing until you see pink in bowl when flushing.
You do not want to run the black water discharge macerator unless you are well offshore in an approved area! There is a 90 degree valve just past the black water tank macerator on the discharge hose. That valve should be closed at all times unless you are legally discharging waste directly into the water in open seas.
If you were talking about the black water tank, I hope this helps.