Just finished replacing my fwd waste tank. The rear one sprung a small leak several years ago and I did a temp repair to it but haven't replaced it yet. We stopped using it a couple years ago knowing it had to be replaced and we were still able to use the forward tank. I had been plotting to replace both tanks at some point but was discouraged at the pricing (including shipping, which was an additional 50% of the tank price!!!). Well, the fwd tank sprung a leak this year, so I was forced to address the issue.

The tanks are each 40 gallons, which seems huge to have 80 gallons of waste on board, especially considering how we use the boat and compared to what's available on any of the newer boats. I contemplated several options and checked out pricing of either going to a single tank (40 gal or larger) or going with two smaller tanks. Using a smaller tank - especially in the fwd compartment - would also allow for some additional space for something like an inverter.

I ended up getting tanks from greatlakesskipper. These are tanks originally spec'd for a Larson boat but fit the dimensions I needed. They are rated at 29 gallons each but when you actually measure them and do the calcs they come out to about 34 gallons. I also remounted the fwd tank a bit more aft and to the port side so there's a lot of extra room in the compartment (it sits under the dinette seating). I'm also adding the iSeries tank monitor system, as I never had a monitor for the waste or potable tanks and always had to open a compartment to visually check the levels.

I have lots of pics but have to upload them and edit a bit but will post. I got the front tank done but the monitor system had a problem so a new one is on the way.