waste tank pumping

[ccruser1]

Greetings all. As I prepare to get ready for a long off season I had my waste tank pumped today. I was puzzeled however by the need or use of the second waste tank cover on the stern just above the swim platform on my SCR2300. Is this simply another access to add water while pumping to aid in flushing the tank?
thanks in advance to all respondents.

[seapuppy]

HUH???....there should only be one waste tank port....check in the engine bay and follow the hoses..one should go to your fw tank...and the other should go to the waste tank...then should be a port low and on the stbd transom for the macerator pump......

SP

[pascavone]

if you ever "bust your tank out boat jail", this is what it looks like for a 30 gallion. upside down pic.



there is only one poop popp tank, maybe that your small fresh water?

[ccruser1]

Thanks for the reply seapuppy.
There are definately two access ports labeled waste tank. One is low on the starboard transom maybe 6" above the deck of the swim platform. The second port is on the starboard side on the flat top ridge about 2' from the fuel port. I could not see any hose going to the lower port by the swim platform but that does not mean it is not there.
This is a 93 2300SCR and in the marina is a 2400SCR that is much like mine and has the same configuration. If I see the owner this weekend I may just ask him.

[capav8r]

Where is your water fill at? I am wondering if your water fill has the wrong cap on it????

[seapuppy]

that's what I was thinking....you might want to go into the engine bay and trace the hoses to it's tank...like captav8r...I'm thinking the water inlet on top is the water...the one near the swim step should be the waste....


SP

[bmax]

My boat has the same thing because it has a grey water holding tank as well as black water. I thought this was a newer option on boats but it may be what you have.

bmax

[ccruser1]

water fill is on starboard side of boat and is correctly labeled.

[shrew]

Regardless of what the labels read on the ports, it would be best to crawl into the engine compartment and follow the hoses. I have a friend who replaced a fuel fitting, but all he could find is on that says "WATER". Not ideal in my opinion. He knows which is which, but I would hate to accidentally put fuel into a water tank or water into a fuel tank. As said above, it might be seperate black water and grey water tanks. When the fittings are in a vertical line, they tend to put the water on the top, waste in the middle and fuel on the bottom. This is for two purposes. With fuel as low as possible both vapors and spilled fuel will run overboard instead of into the bilge. Likewise it is ok to spill water into the waste tank, but not waste or fuel into the water tank. Hence water is typically on the top.

Of course for safety's sake, I only fill/pump one at a time, so there is ever only one cap off at a time. I can't imagine trying to fill fuel and water simultansously. If I were to get water in my fuel as a result, I would only have myself to blame.

Just a couple of thoughts.

[ccruser1]

Thanks to all respondents. I took a look under the engine hatch and found that the port in question on the transom does go to the fresh water tank. I double checked the port cover and the port is stamped waste. There is however another "water" fill port on the starboard side midship that I used to fill water tank prior to launch a month ago. As far as I can see there are only two tanks in the engine compartment aside from the fuel tank of course. Is there another tank hidden near the head that I am missing? Think I will check with owner of the other Maxum in marina this weekend as it looks like he has the same set up.