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Old 12-20-2013, 10:13 AM   #11
Denver, CO
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Originally Posted by Chuckinca View Post
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.

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Old 12-20-2013, 10:23 AM   #12
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I pull mine after I count to 30 - about a half minute for our 35 gal black tank. And repeat two or three times until the water clears up.


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Old 12-20-2013, 12:10 PM   #13
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Originally Posted by quick83 View Post
garbonz, watch for diff water pressures when you do this if not using a pressure reducer on your water supply to flush connection. if you have high water pressure at the hook up it will change your fill time and you could have a disaster (like water coming up inside rv toilet and flood bathroom.) im just sayin. It only takes ONCE.
I do the same as garbonz - always use a timer on my phone and don't silence it until I've actually pulled the handle.

BUT- unlike garbonz, I put my wye directly on the hose bib at the site- one side goes to my tank flush, the other side goes to my hose and then my watts regulator which is hooked up to a short length of hose in my water bay/hookups area.

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black, black tank, tank

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