Nando: Yes, its galvanized. It a pressure tank, not a hot water heater tank.
My system is a batch system with a 42 gal tank plumbed directly into the hot water line. The normal, unheated pressure of the system is approx. 50 psi. The tank dimensions are 51" x 16".
My main concern is that as the water heats, the pressure increases. I don't know what the typical pressure of heated water is and I don't want to burst the tank.
What is Electrolysis protection? Are you talking about the fittings (i.e., galvanized to copper)?