Dometic White M65 Marine Gravity Toilet - Elongated Seat Size w/Foot Pedal [312500001]White M65 Marine Gravity Toilet Elongated Seat Size with Foot Pedal The Dometic M65 5000 marine toilet is a complete toilet and holding tank system in one package. This Type III MSD has a 6. 5 gal. (24. 6 L) tank and makes a great replacement for permanently installed portable toilets. Features: Low flush water consumption: less than one pint (0. 10 gal 0. 39L) per flush The built in 6. 5 gallon 24. 6 liter holding tank provides plenty of capacity for