Has anyone used a flexible tank? My boat came with a 40 gal built in fiberglass tank that must have leaked at some point, was cut out and replaced with a West Marine 20 gal. tank. I would like to have something larger, but have not pursued it farther than thinking about it.
Wm Mayberry
OPTIMYSTIQUE
Mariner 40
Tennessee River Lakes[/QUOTE
I had a flexible black water tank on my boat. It started to smell after a couple of years. I replaced it with a rigid tank from Ronco.
Your two best choices are either a 'plastic' tank (see link for one supplier) if they have a size that fits, or a custom FRP tank.
You don't want to use any kind of metal, even if painted/coated. Black water is quite corrosive.
Many of the boat assemblers in FL use these folks , Duracast.
I plan to install a Ronco tank with a bottom fitting for the drain. I would think that a fitting in the top of the tank with a drop tube going to the bottom of the tank would not allow the tank to fully empty.
I plan to install a Ronco tank with a bottom fitting for the drain.
I would think that a fitting in the top of the tank with a drop tube going to the bottom of the tank would not allow the tank to fully empty.
Best is Use the top mounted dip tube. The bit remaining will not be noticed I built my own tank of Nytex and epoxy but I built in a floor depression that the dip tube sat into with about 1" clearance so almost empties 100%.
If you insist on using the bottom port then install a shut off valve. Failure to do so will result in you getting bitten when the pump fails and the tank is full.
If the tank is thick enough to stand alone , with no box or foam to stabilize it , just hold downs , that would be worth extra cost and shipping expense.