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06-17-2009, 05:53 PM
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#1
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Senior Member
Workhorse Chassis Owner
Join Date: Mar 2007
Location: Pikeville, NC
Posts: 1,775
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5th wheel Montana--Shower drains into black water tank-- Why
My neighbors shower drain is piped into the black water tank in his 35' Montana 5th wheel (We are in coastal Maine for 6 months). Why is that done and is there a solution to run it into the gray water tank?
It seems to me that this is not desirable ---
They bought it used and didn't know that fact. The black water tank backs up into the shower floor real soon during normal usage. Not a pretty sight.
__________________
Max H,
2002 Newmar Mountain Aire, 37', 3778, W-22, 8.1 Vortac, Ultra Power upgrade, CAI (cold air intake), Taylor wires, colder plugs, Koni shocks.
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06-17-2009, 10:12 PM
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#2
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,951
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I've never heard of a shower plumbed into the black tank. Some years ago RV manufacturers used to plumb the lavatory (bathroom sink) into the black tank because they received many complaints of plugged tanks. The root cause was insufficient water in the tank.
I suggest re-plumbing to route the shower into the gray tank. Just remember to use sufficient flushing water to keep all solids covered in the black tank.This may be accomplished by adding 5G of water immediately after dumping the black tank, which should keep any solids submerged if a partial bowl of water is used when flushing.
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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06-19-2009, 07:25 PM
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#3
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Senior Member
Join Date: Feb 2003
Location: South Prarie WA USA
Posts: 163
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Is he sure thats where its going?.... Most of the Montana's of that Vintage have 3 tanks.. 1 gray, 1 black, 1 galley. When I purchased mine (used) I had found that someone had switched the labels for my Gray and black water tanks. The black tank only has the one 4inch intake, direct from the toilet, as well as the 1.75 for the vent. the Gray has one 4 inch with several Ts' (Tub and bathroom sink). The galley is a 2inch.
__________________
99 F350 4X sc 6sp Dually, 03 Montana 3655FL/5er
https://www.wsdot.wa.gov/traffic/passes/white/ not far from home...
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06-28-2009, 03:45 PM
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#4
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Senior Member
Join Date: Jul 2002
Location: Sarasota, Fl USA
Posts: 338
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One of my motorhomes had three tanks. The shower had its own tank, but it output was connected to the same discharge pipe as the black tank, but after the black valve. So, I had three handles to mess with to empty the three tanks. I was quite confused the first time I emptied the "two" tanks, and two days later the shower would not drain, yet the tanks showed almost empty. After crawling around a bit I found the third handle displaced from the other two and traced it back to another tank.
Could we have a similar situation here?
Bob
__________________
2003 Dodge HO 6 speed Laramie Dually, Jordan controller, RDS fuel tank, Air Ride 25K hitch
Carriage 36' fiver, Onan 6500, Prosine 2K inverter, 3 slides, MORyde IS and Kingpin
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09-20-2009, 11:56 PM
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#5
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Junior Member
Join Date: Mar 2007
Location: BC
Posts: 22
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I think it probably has three tanks, two grey and one black. My 08 Montana does. The galley tank valve is located near the back of the unit, some between the axels which some folks fail to find at first. Have him check the Montana Owners forum, you will find the answer there.
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09-21-2009, 05:47 AM
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#6
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Senior Member
Workhorse Chassis Owner
Join Date: Mar 2007
Location: Pikeville, NC
Posts: 1,775
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Thanks for your inputs---
Tony has your answers. I'll let you know what he finds. I also think he has a crack/leak in a/the gray tank(s).
Max
__________________
Max H,
2002 Newmar Mountain Aire, 37', 3778, W-22, 8.1 Vortac, Ultra Power upgrade, CAI (cold air intake), Taylor wires, colder plugs, Koni shocks.
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