I have a hunter legend 40, the marina is going to suck out holding tank Tuesday is there anything I need to do? Any valves or shut offs in need to turn on? Have lived on her for only 3 weeks so still learning Thank you for your help
You should probably take a fresh water hose and run it back into the pump out deck fitting for a minute or so, after they empty. Then empty again. Helps dilute and pick up the sludge. Busy marinas or lazy dock hands may squawk at this, but most expect you will want to.
Personally, I never like holding tank contents to sit more than a few days. One week max.