Word of caution. The overflow on mine was a 1/2inch clear tube in the fill compartment and I could see the water start to run down it before it started building up pressure I would then quickly shut it off. The garden hose has a lot more volume and pressure than would be able to escape from that small overfill hose. The water tank was plastic and sandwiched in between the tongue & groove hard wood floor and steel supports underneath, the tank would expand and lift the floor.
That happened to the previous owner and I was pretty paranoid it would happen to me. I took that job very seriously, since I did not want it to happen again.