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08-23-2013, 05:14 AM
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#1
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Senior Member
Join Date: Sep 2012
Location: Palm Coast Florida
Posts: 12,995
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Pump out Trucks using vacuum
Used a pump out truck yesterday. Had a 35 gal. Tote pumped out 1st. The vacumm from the truck collapsed the tote. The air valve on the tote was not large enough to offset that massive vacumm from the truck. The tote (to my amazement) did regain it's shape after the vacuum was shut off.
When we did the trailer I held the foot pedal down on the toilet to offset the vacumm. Wanted to do this so the black holding tank would not be damaged. Doing this wasted a lot of water...ugh.
Anyone else use pump out trucks and what are your experiences? Do you worry about the massive vacuum?
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08-23-2013, 05:31 AM
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#2
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Senior Member
Join Date: Aug 2010
Posts: 455
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Quote:
Originally Posted by tuffr2
Used a pump out truck yesterday. Had a 35 gal. Tote pumped out 1st. The vacumm from the truck collapsed the tote. The air valve on the tote was not large enough to offset that massive vacumm from the truck. The tote (to my amazement) did regain it's shape after the vacuum was shut off.
When we did the trailer I held the foot pedal down on the toilet to offset the vacumm. Wanted to do this so the black holding tank would not be damaged. Doing this wasted a lot of water...ugh.
Anyone else use pump out trucks and what are your experiences? Do you worry about the massive vacuum?
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Why didn't you turn off your water pump while you held the foot pedal down???
__________________
Stik
Full Timing since 2005
09 Journey 34Y, 2015 Grand Cherokee Toad
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08-23-2013, 05:52 AM
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#3
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Registered User
Monaco Owners Club
Join Date: Oct 2009
Location: Varies Depending on The Weather
Posts: 8,517
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We have used pumping companies when staying in Anchorage for two months without any difficulties. They are VERY experienced working with RV tanks.
Their vacuum system could crush one of your tanks so they only open their valve slightly when pumping.
I have heard that some companies will dump you tank into a holding pan and vacuum from there but that doesn't sound too sanitary to me.
Dr4Film ----- Richard
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08-23-2013, 06:47 AM
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#4
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Senior Member
Damon Owners Club Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,024
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When they pumped out mine one of two methods were used... one had an air admittance valve (Vacuum breaker) in a 3 inch line so if the truck sucked too fast it just let air in.
The other shoved his sucker down inside my 3" hose, held with the open end above the top of the tank, which basically did the same thing,,, Both ways mean the pump can not suck faster than the tank would dump if dumping into a hole in the ground (standard sewer inlet).
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Home is where I park it!
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08-23-2013, 07:33 AM
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#5
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Senior Member
Fleetwood Owners Club
Join Date: Jan 2010
Posts: 1,391
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Owned six vacuum trucks at one time and refused to hookup to an RV. 22 inches of vac is very mean. Didn't want to buy anyones RV.
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08-23-2013, 07:44 AM
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#6
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Senior Member
Newmar Owners Club
Join Date: Oct 2009
Posts: 10,310
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I think my tanks have a 2" vent pipe (I think all rv's do 1-1/2 - 2") and wouldn't that vent pipe keep up with the vac process? I have been vaced out with no problems.
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2012 Essex 4544 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006 Ultra & 1989 Springer, 2003 Harley-Davidson
FLHR Road King Anniversary
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08-23-2013, 07:57 AM
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#7
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Senior Member
Winnebago Owners Club Coastal Campers
Join Date: Oct 2009
Location: Marathon, Florida
Posts: 2,909
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The CG we stay at for four months has a "honey wagon" that uses a pump to empty your tanks. We have been going there for years and they have upgraded it to a larger one since we first started going there. We have never had a problem but they only empty our MH tanks not a tote tank. Why would you not drag the tote to the dump station?
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Mark & Nancy
2004 Winnebago Vectra 40KD
Shep dog, R.I.P. Kenzie dog Toad 2015 Jeep Wrangler Willys Wheeler
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09-28-2013, 09:14 PM
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#8
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Senior Member
Fleetwood Owners Club Ford Super Duty Owner
Join Date: Jun 2012
Location: SoCal
Posts: 15,749
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Quote:
Originally Posted by palehorse89
I think my tanks have a 2" vent pipe (I think all rv's do 1-1/2 - 2") and wouldn't that vent pipe keep up with the vac process? I have been vaced out with no problems.
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I have never been pumped, but also would think the vent pipe would mitigate the issue.
__________________
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
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09-28-2013, 09:42 PM
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#9
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,435
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Quote:
Originally Posted by tuffr2
Used a pump out truck yesterday. Had a 35 gal. Tote pumped out 1st. The vacumm from the truck collapsed the tote. The air valve on the tote was not large enough to offset that massive vacumm from the truck. The tote (to my amazement) did regain it's shape after the vacuum was shut off.
When we did the trailer I held the foot pedal down on the toilet to offset the vacumm. Wanted to do this so the black holding tank would not be damaged. Doing this wasted a lot of water...ugh.
Anyone else use pump out trucks and what are your experiences? Do you worry about the massive vacuum?
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Holding the toilet open was required where I had to be pumped, turn off the 12v water pump to avoid wasting water.
Missed post #2 sorry duplicate.
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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