You should have a pump out station on the water or by the fuel dock. It usually takes 1.00 in quarters. Unscrew the cap and insert the head of the hose in the hole. You don't need to turn it on full blast at first though. Turn it about halfway on to let the pressure build up then you can turn the handle all the way on. I don't recommend bleach. Go to walmart or an RV dealer and get a holding tank mixture then pour a bit down your toilet. Hope this helps.