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Old 05-29-2013, 04:12 PM   #1
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How long should it take to dump holding tanks?

Newbies to a travel trailer here. Just came back from our first trip out and had a great time. However, it seemed to take FOREVER to empty our holding tanks. On average how long should it take? Our grey tank seemed to take much longer almost just a trickle.

Advice? Possible issues??

Thanks in advance for your experience and help.
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Old 05-29-2013, 04:13 PM   #2
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got one of those clear plastic adapters so you can see the flow? it should flow pretty good... full tanks will take several minutes to empty...
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Old 05-29-2013, 04:20 PM   #3
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It takes a while to dump 40 some gallons through a 3 inch opening.

In case you have a TurboFlush, plan on running that for at least 10 minutes and ideally 15-20 or until clear. Obviously if there is a line for the dump station, you might want to wait for a full hookup campground for a serious flushing.

Keeping the tanks as squeaky clean as possible with frequent and thorough flushing and coated with a "slickener," like Calgon Liquid Water Softener, will speed up the process some.
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Old 05-29-2013, 04:22 PM   #4
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Our motor-home's tanks (60 gallons each) dump from full in about 3 minutes for each one. I have a clear-plastic 90-degree elbow with the lugs to match the drain and the sewer hose so I can watch the flow. If we're at the full stretch of our sewer hose, it might take and additional minute.

It sure isn't a "trickle" - more like a fire hose. At the end of the grey tank dump, the flow rate slows down, then there's a big rush dumping the last two gallons or so.
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Old 05-29-2013, 04:25 PM   #5
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You give NO info on type of RV,# of tanks,how many dump outlets on unit,how many Gal.tanks are? Need info! Ps,how long will it take to get to my Campground? Youroo!!
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Old 05-29-2013, 04:27 PM   #6
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Make sure your rig is tilted to the dump side so gravity can help. Also, dump full tanks. If not full, just add more water before opening your valve(s).
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Old 05-29-2013, 04:38 PM   #7
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Depending on how many gallons you have. should not take longer than 10 minutes. rule of thumb, ALLWAYS dump black water first then dump grey/galley water. Helps to clean the poop chute (drain pipe).
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Old 05-29-2013, 05:12 PM   #8
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Quote:
Originally Posted by jarvo9 View Post
Newbies to a travel trailer here. Just came back from our first trip out and had a great time. However, it seemed to take FOREVER to empty our holding tanks. On average how long should it take? Our grey tank seemed to take much longer almost just a trickle.

Advice? Possible issues??

Thanks in advance for your experience and help.
It would help to provide your RV information - make, model. There could be debris in the grey tank. May help to post pic of your dump valves if they are plumbed into a central main valve. Could be a valve stuck.

How close is your dealer, let them check it out?
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Old 05-29-2013, 05:29 PM   #9
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I agree with himcules on the clear adapter to see what's going on. I believe my tank drains considerably slower when there are 2 or more RV'ers behind me at the dump station waiting for me..
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Old 05-29-2013, 05:59 PM   #10
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Thanks tor the replies. We have a brand new Wildwood 195BH with 25 gallon tanks. Seperate black and grey tanks. Draining is definitely NOT anything like a firehouse and takes much more than 5-10 minutes. We do have the clear adapter that is how we knew it was just a trickle for the most part.
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