Water fill too slow August 22, 2013, 02:42:35 pm Yahoo Message Number: 142159Hi Randy. I don't know about your '88 model, but it should be similar to my '99TK. The water fill hose is about 1 1/2" diameter and about 2 feet long into the tank. My tank is under the kitchen window against the wall, just under the fill opening. You should be able to see any kinks or blockages in the fill hose. There is a small 3/8" flexible plastic hose coming from the tank to the fill opening. The outlet of this hose is visible when the fill door is open, in the lower right corner. Mine has a fine mesh brass screen. This is a vent line to let air into the tank as you use water, and vents air out of the tank while water is going in during filling. If it were plugged up I could see it being more difficult to fill the tank quickly. You should feel air coming out of that hole while you are trying to fill. I can put 40+ gallons into my tank in less than 3 minutes. Hope this helps. RonB[Non-text portions of this message have been removed]