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Old 08-21-2014, 08:50 AM   #1
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Enclosed tank access

My wife and I have been looking for our first MH for months now and while we have narrowed the choice down to 3 or 4 units, one questions keeps popping up. Why do some manufacturers place the sewer connections in an enclosed storage unit (with a drain) while others leave them open to the elements?
Is there an advantage to either setup?
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Old 08-21-2014, 09:12 AM   #2
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Originally Posted by sfergie631 View Post
My wife and I have been looking for our first MH for months now and while we have narrowed the choice down to 3 or 4 units, one questions keeps popping up. Why do some manufacturers place the sewer connections in an enclosed storage unit (with a drain) while others leave them open to the elements?
Is there an advantage to either setup?
sfergie
IMO, that is a "non-issue".
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'96 Safari, (with the 3" sewer hose connection "open to the elements")
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Old 08-21-2014, 09:18 AM   #3
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Thanks Mel for the reply.
I was just concerned that if the drain is open to the elements it is also open to the random critter looking for a home, as well as the possibility of something getting damaged while on the road.

Sean
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Old 08-21-2014, 10:34 AM   #4
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Sean, I don't think I've ever seen a MH with exposed sewer connections. I know that's the norm on TT's and 5ers.
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Old 08-21-2014, 10:46 AM   #5
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fergie, we have one now with the drain in an enclosed compartment. Have to take a screw cap off and pull the hose up through that hole to attach it. This is a pain since the hose must be forced to make a slight bend to attach. We use the 4 lug connector since the two lug we had would leak a some when dumping. The 4 lug (orange hose ) is stiffer and grips the outlet tighter.
The previous coach had a outlet outside below the wet bay. There was a cap, but the dump valves were inside out of the weather.
I cannot recall seeing a MH with an outside valve and drain system but there probably is. My concern would be water getting into the drain pipe past the valve in the winter and a freeze causing a cracked pipe. Other than this, I really liked the outside the wet bay connection. (so easy!!)
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Old 08-21-2014, 10:48 AM   #6
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Space and style of MH. Having moved from Class Cs to Class As years ago, don't pay that much attention to Cs anymore, but don't remember seeing a regular or micro class C with compartmental sewer during those years and in reverse I don't remember seeing a Class A, 2004 and newer, with external sewer connections. Part may be due to the lack of height in the Class C units. I do remember having to replace the connections on a micro C because of dragging the system off crossing a BLM parking area at lake Mead.
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Old 08-21-2014, 10:59 AM   #7
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We are looking at a Jayco Greyhawk and they have the valves (grey and black) as well as the drain itself exposed.
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Old 08-21-2014, 01:48 PM   #8
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There are 2 reasons for having the drains enclosed in a wet bay.

One, road gators will destroy exposed drains (I know this for a fact on our 5th wheel we had)

Two, those enclosed wet bays generally have a heater with a vent to the wet bay to keep it from freezing (also an experience we had in the 5th wheel).
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Old 08-22-2014, 06:54 AM   #9
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Thanks Mel for the reply.
I was just concerned that if the drain is open to the elements it is also open to the random critter looking for a home
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Old 08-22-2014, 11:04 AM   #10
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Enclosed tanks

Maybe I didn't really explain my question well.
the valves and outlet in the attached picture are all enclosed in a housing where as some are completely out in the open.
Just wondering which is better or worse.
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Old 08-22-2014, 01:32 PM   #11
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I don't think there is a better or worse. It pretty much depends on the design of the motor home. I currently have 3 Class C's, 2 of them have the pipes and valves exposed, the third is a basement model C - styled like an A with large storage doors along the lower sides. That C has an enclosed compartment similar to the picture you posted.
No critters would be making a home in the pipe if it has the end cap like mel s posted, unless they want to lay on top of a pipe.
I don't think that would be any more inviting than laying on top of the exhaust system.
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Old 08-22-2014, 07:20 PM   #12
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Enclosed is better! As mentioned earlier, nearly all of the enclosed wet bay areas also have heat in them so that they do not freeze up the way that exposed ones will in cold weather. In addition they are protected from damage due to items thrown by the tires.

One major factor in the location of the dump valves is the location of the waste tanks of the RV in question. Since the dump valves have to be lower than the tanks, if you have a travel trailer or class C with the tanks mounted under the floor and somewhere outside, there is no way to put the dump valves inside because of gravity. Most class A motorhomes have a raised floor above the frame rails of the chassis and then "basement" storage bays below the floor and below the chassis rails. By doing it this way it is very easy to place the waste tanks just below the floor, leaving at least 1 or 2 foot drop to the dump valves with them inside of a heated and protected bay.
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Old 08-23-2014, 08:37 AM   #13
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Enclosed is better! As mentioned earlier, nearly all of the enclosed wet bay areas also have heat in them so that they do not freeze up the way that exposed ones will in cold weather. In addition they are protected from damage due to items thrown by the tires.
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On my coach the 3" sewer hose connector is exposed and visible when my wet bay door is closed. (as is less than a foot of 3" sewer pipe).
However the dump valves, and the remainder of the sewer pipes, are enclosed in heated compartments.
The exposed portion is empty, (except when I am dumping the tanks), and has not been damaged in 133k miles.

Would I prefer an enclosed sewer hose connector?.......YES.
Do I think it's anything to be concerned about when choosing a coach?..... NO

Mel
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Old 08-23-2014, 08:50 AM   #14
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My class C has the black tank on the passenger side and the sewer pipe below the frame rails. The outlet is about half visible below a locking door that protect the valves, but must be open to be hooked up. We just about scraped off the black gate valve getting into a national forest campsite, and it took all of our leveling blocks to avoid taking it off to get out.

I would probably pay more attention to that on our next rig, but it wouldn't be a show stopper.

For winter, I'll just buy some extra rv antifreeze and put a gallon or two in the black and gray tanks and make sure appropriate lines are empty. Shouldn't be a problem.
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