Anyone know how to access the water tanks on 410. Maybe 390 is the same. Pretty sure I'm holding water. Don't know where the pumps are either and would like to make sure they are drained. No pump wasn't working when I got the boat. Need to find them so I can at least turn them on. Appreciate the help.

My 390 only has water supplied to a sink faucet (uses electric in line pump) in the head compartment. There is a flexible, plastic water pouch suspended under the "cabinet" in the head.

My 320 had the bag also for the bathroom sink. No bag on this boat .I definitely have a tank on port side for the sink in counter top , maybe both sinks share same fresh water tank. The one on starboard is probably a holding tank for head. Ill take another look for the pump in the bathroom, it has to be there. Thanks for the help

There is also a rear shower head on swim platform

,OK I found the pump run right infront of my eyeballs apparently there is approximately a 40 To 50 gallon freshwater tank that the ,Bathroom countertop sink And rear shower head share. I dumped All of The water out.It was full right to the top just about . the other starboard Water fill is the dump for the manual porta potty which was empty.40 gallons of water weighs about 320 pounds . So anywhere from 320 to 400 pounds worth of water was sitting towards the front port side of the boat .that would explain why the boat kind a lean to the Port side a little bit . I had never checked it because I was so busy working on the engines Wish I did .I wonder what that will do for my speed and bow lift. I don't know what size this tank really is I have a 3.8 gallon per minute water pump that pumps at 45PSI I ran the pump for approximately 13 minutes I'm thinking 40 gallons does anybody know what size this take is