Originally Posted by Chuckinca
From "Home Guides"
"Both 5/8- and 3/4-inch hoses come in various lengths. From 25 to 100 feet long, choose the best length for your property. Be aware that a longer hose reduces the water volume expelled. For example, a 5/8-inch hose 25 feet long produces 44 gallons per minute (gpm). The same diameter hose at 100 feet long has a much smaller output at 11 gpm. Because 3/4-inch hoses have a wider mouth, their output for a 100-foot hose is slightly larger at 18 gpm, but the 25-foot hose increases the water flow to a staggering 72 gpm."
I assume they are at normal house pressure of about 65 PSI.
Another good point. However, in my experience most campground are also flow limited in that the pressure is related to the flow rate. Also, the spray nozzle in the tank restricts the flow by it reduced orifice.
I have been using the timing method for filling and rinsing the tank for MANY years, without problem. All the instances of floodingI have heard of were caused by forgetting to pull the tank valve after a few minutes. Using a stopwatch (countdown timer) prevents this.
Just my experience, your's may vary.