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03-13-2022, 10:40 AM
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#61
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Senior Member
Join Date: Jul 2017
Location: Romeo
Posts: 142
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Quote:
Originally Posted by jasin1
Keep us updated..maybe you could rig up a portable black tank tote to use while your repairing it ? Unless you have nearby facilities you may be able to attach some flexible hose from the tote to what ever pipe is left from the toilet.
Need to closely watch it though for overfill
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or coudl one temporary replumb the toilet into a gray tank ...until project done.
bigger and has sensors as to a tote ????
__________________
2018 Cougar 359MBI
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03-13-2022, 10:44 AM
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#62
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,840
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Yeah probably a bad idea to rig up a tote..don’t want another environmental hazard on your hands.
Sounds like you had a plan so might as well stick to it
__________________
2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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03-13-2022, 12:02 PM
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#63
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Senior Member
Join Date: Sep 2019
Location: Florissant
Posts: 703
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Quote:
Originally Posted by jasin1
Yeah probably a bad idea to rig up a tote..don’t want another environmental hazard on your hands.
Sounds like you had a plan so might as well stick to it
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For short term, just use the campsites crapper.
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Skids
2019 Bullet 248RKS
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03-13-2022, 12:30 PM
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#64
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,840
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Quote:
Originally Posted by skids
For short term, just use the campsites crapper.
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Couldn’t remember if they were boondocking or not
__________________
2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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03-19-2022, 01:17 PM
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#65
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Member
Join Date: Jan 2022
Location: yuma
Posts: 32
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Yes we are boondocking.
I have replaced the tank and plumbed the 3 connections. The new ICON tank is almost identical to the old one. The old tank did indeed slide out once one of the 2 supporting beams was removed.
The job went OK and was a PITA but nothing impossible. The only change to the original setup was the tank drain pipe. I put a rubber/clamp coupler in the drain pipe, downstream from the valve. Only way I could figure out how to get the valve and pipe all back together.
I've tested the tank and the new fittings. Nothing leaking yet. It took me a total of about 8-9 hours of (relatively unpleasant) work and a little over $300 to fix my screwup. Could have been worse.
__________________
2007 Dodge RAM 3500 diesel, dually, 6 speed, 4WD, pulling a 2016 Keystone Carbon 387 (with too many motorcycles inside) around the American West.
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03-19-2022, 01:28 PM
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#66
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,353
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Quote:
Originally Posted by bikemechanic53
Yes we are boondocking.
I have replaced the tank and plumbed the 3 connections. The new ICON tank is almost identical to the old one. The old tank did indeed slide out once one of the 2 supporting beams was removed.
The job went OK and was a PITA but nothing impossible. The only change to the original setup was the tank drain pipe. I put a rubber/clamp coupler in the drain pipe, downstream from the valve. Only way I could figure out how to get the valve and pipe all back together.
I've tested the tank and the new fittings. Nothing leaking yet. It took me a total of about 8-9 hours of (relatively unpleasant) work and a little over $300 to fix my screwup. Could have been worse.
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Feel free to come by the shop…your hired!!!
Glad you got it all fixed.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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03-19-2022, 02:15 PM
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#67
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,840
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Quote:
Originally Posted by bikemechanic53
Yes we are boondocking.
I have replaced the tank and plumbed the 3 connections. The new ICON tank is almost identical to the old one. The old tank did indeed slide out once one of the 2 supporting beams was removed.
The job went OK and was a PITA but nothing impossible. The only change to the original setup was the tank drain pipe. I put a rubber/clamp coupler in the drain pipe, downstream from the valve. Only way I could figure out how to get the valve and pipe all back together.
I've tested the tank and the new fittings. Nothing leaking yet. It took me a total of about 8-9 hours of (relatively unpleasant) work and a little over $300 to fix my screwup. Could have been worse.
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What did you find with the old tank? Was it split?
__________________
2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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03-20-2022, 08:46 PM
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#68
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Member
Join Date: Nov 2020
Location: Vancouver Island
Posts: 34
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Good job fixing your tank!
Too late for you, I guess, but maybe not for others who may have to replace a tank.
I did mine a little different, but ended with the same result. I cut the inlet pipe and the vent pipe in the basement and dropped the whole thing after I unbolted the dump valve. put new pipe stubs in the tank cut to length and used couplings to put it back together. I didn't tighten anything until the dump valve in place and bolted up so that I had some play to get the dump valve in without "fish mouthing" a gasket.
I also put a couple of ratchet straps under both the new tank and the black tank attached to the trailer frame on both sides for a little insurance.
I was lucky that mine was the grey tank which had split just below the flange at the top of the tank. my theory is that when the tank was full, there was too much pressure on the flange which deflected and cracked the tank. I tried to plastic weld it, and it lasted for awhile, but in the end I had to replace the tank.
Just suggestions for anybody else that might want to change a tank........
__________________
2014 Keystone Laredo 292RL
2018 GMC 3500HD Duramax
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03-21-2022, 06:52 AM
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#69
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Senior Member
Join Date: May 2019
Location: Cotulla, TX
Posts: 463
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black tank autopsy results?
Quote:
Originally Posted by jasin1
What did you find with the old tank? Was it split?
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It seems rare that we get the OP's final comments as to what part of their tanks failed. Bike mechanic has been stellar so far at keeping this thread's replies answered. Looking forward to the conclusion analysis. Thanks all...interesting thread!
__________________
Mesa, AZ
2019 Alpine FL3700
2020 F-350 King Ranch
Retired Fire Capt/paramedic 34 yrs
Current owner 2 HVAC companies
Past owner Res/Com electrical
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03-21-2022, 06:55 AM
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#70
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Senior Member
Join Date: Nov 2017
Location: Mico, TX
Posts: 7,471
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Quote:
Originally Posted by chuckster57
Feel free to come by the shop…your hired!!!
Glad you got it all fixed.
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If I were an RV tech, I would strongly consider subbing out black tank jobs!
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wiredgeorge Mico TX
2006 F350 CC 4WD 6.0L
2002 Keystone Cougar 278
2006 GL1800 Roadsmith Trike
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03-21-2022, 08:24 AM
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#71
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Senior Member
Join Date: Nov 2018
Location: Norwood, CO
Posts: 685
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bikemechanic53
So, what was the failure? Did it actually split or was it something else?
Very Curious.
By the way congratulations on a great job done and finished!!
__________________
German Shepherd Guy
2018 Keystone 26RBPR
2014 Suburban 2500, 6L with 3.73 rear
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03-27-2022, 02:49 PM
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#72
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Member
Join Date: Jan 2022
Location: yuma
Posts: 32
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Yes. The black tank was split at the connection between the top and the belly. Apparently it blew out before the pressure could push the water out the top of the vent pipe on the roof.
4 Pictures below ( I think I did this correctly.)
First is a picture of the 2 waste tanks in the front of the 387.
Second is a closer pict of the ruptured black tank. Can't see any problems.
Third and fourth are picts of the ruptured tank after I got it out. Blowout is clearly visible. The other hole is from cutting out the toilet drain pipe to get the tank out of the RV.
BOY, This was SO MUCH FUN I feel like I could do it again! ( said no one ever)
__________________
2007 Dodge RAM 3500 diesel, dually, 6 speed, 4WD, pulling a 2016 Keystone Carbon 387 (with too many motorcycles inside) around the American West.
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03-27-2022, 04:02 PM
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#73
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Senior Member
Join Date: May 2019
Location: Cotulla, TX
Posts: 463
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Thanks for the final analysis! I've posted on previous threads, the consequences of over filling the black tank with the dump valve closed. The internal lifting pressures pushing against the top and bottom halves of the tank, will cause a tank of this type of construction, to fail, long before the liquid will rise high enough to exit the roof vent. The total force (in lbs), trying to separate the 2 halves is equal to the total of: 5 psi x L" X W". 5 psi is the required pressure required to push the tank's liquid to the top of the roof vent, which if it should occur, would limit the any further increase of lifting pressure beyond the calculation. Example, if bike mechanic's tank had a top dimension of 20" X 40", the lifting pressure could be as high as 4,000 lbs. I have my doubts that even a blow molded tank could survive without some form of damage. For sure, It would look more like a balloon than a rectangular shape, maybe causing the supporting belly bands underneath the tank, to snap. A a partially filled plastic gas can with no vent, takes on the same shape if left in the sun for a few hours. I vote for 10 extra punches on Bike Mechanic's man card, for taking on this project himself! Well done!
__________________
Mesa, AZ
2019 Alpine FL3700
2020 F-350 King Ranch
Retired Fire Capt/paramedic 34 yrs
Current owner 2 HVAC companies
Past owner Res/Com electrical
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