Max weight in luggage bay

[Nick Badame Refrig/ACC]

Hi Scott,

I have 250 gallons of holding water, a 12 gallon H2O heater, and my Proheat all in my
rear bay. 12 years now without any signs of any problems.

Good Luck
Nick-

[Scott & Heather]

Nick, thank you so so much for that data point. That's exactly what I needed to hear. You have a 102c3 as well right? Can you tell me how the 250 gallon tank is set up? Custom across the entire bay? Pics?


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[brmax]

Scott when you mentioned your tank consideration at about 12" tall, I had ran that through the calculator and seems to be about 120 gallons each. An interesting point for me was the clearance in my 9 is about 22" under the tunnel as I recall. This would definitely have some good room for other stuff, does the 102 have more height clearance in the bays, curious.
Floyd

[Scott & Heather]

Floyd, I think I used an online calculator to determine approx 12" tall, and 3.5x8' width and length. Should have been approx 200 gallons if I remember right


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[goldgiter]

That is a good idea, but why not stack them so your weight is always in the same bay! Wish I had done that.

Wes

[Scott & Heather]

Wes, that was my original plan and then all I had to do was insulate and heat one bay. I would have all my "outdoor" plumbing in that bay and not have to worry about heating all three like my mc9 is set up. It's annoying. The issue for us is that we do indeed dump our grey directly out diverter valves I put in all the drains so they discreetly go to the ground underneath the coach. So when we are on traveling on a long trip, our black/grey tank is only holding toilet contents. Along the way we use up the 100 gallon fresh tank several times over and are refilling at truck stops, friends houses etc without having or taking an opportunity to dump. This has led to us having both the black/grey tank AND fresh water tank full simultaneously and I'm not so sure one bay could hold 400 gallons (3200 lbs)

According to cliffs numbers, it would be majorly overmaxing out the rear bay to put that much weight in it. If someone tells me otherwise, then that's exactly what I'm going to do. Stack the 200 gallon tanks in the rear bay.


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[luvrbus]

I saw a neat tank install in a MCI C they were vertical mounted 250 gal tanks about 12 inches thick that went from the floor to the top of the bay with the tunnel notched out

[brmax]

I get what your saying Scott, I had thought you meant them 4x8x12 as split being two smaller tanks. Rollin again here, interesting now and roughly the bay capacity ive heard.
Are your plans having the empty access on bottom, in any case a good idea you have.
good day there
Floyd

[Scott & Heather]

Floyd, I think I'm intimidated to build a shelf that can elevate the tanks and hold 3200+ lbs. I would love to elevate them and have empty access underneath because that would allow me to have a definite slope for the black tanks drain no matter where I park. Put the drain up high and you're very likely to have a slope regardless of the terrain. But again, that's a lot of weight and I'm not a metal fab guy or an engineer


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[blue_goose]

If you put them both in same bay you should never have more than 200 gal of liquid at any time.  If you can't find a dump you could always use a pump and dump most anywhere.
Jack

[goldgiter]

If you put a tank in the rear bay and then a tank in the center bay you will only be separating the by a few inches, I don't see where that would make a lot of difference.
You can put the black/grey tank on the bottom, fresh on top and build a metal and wood frame to sit the top tank on. If it makes you feel better you could extend the framing for the top tank into the center bay to help distribute the weight.

Wes

[sledhead]

all my tanks are in the last bay . 100 gal. fresh , 80 gal. grey , 35 gal black + in floor heat manifold and heat exchanger , small 2.5 gal. water heater with enough space left over for a extra 80 gal. tank . and yes it is easy to heat the bay .  most of the time all that is in there is 100 gal. weather it,s in the fresh or grey or black .
there have been times that I could have used more fresh water but not many 

I would try to put all tanks in 1 bay if possible

just my way

dave






   

[brmax]

 Is there the tunnel in the 102s bays like the model 9 has, curious now as I thought it did.
The black tank having a slope I always thought would be good and somewhat easier maintenance, however that could be worked out.
Scott that tank rack might take a bit of steel, id have to get my nephews to hoss that around!
You could build it no doubt in my mind.

Floyd

[kyle4501]

My thoughts on holding tanks -
Make the tanks as tall as the bay allows.
Make only as wide as you need for capacity.
This will give more pressure to dump the waste & will do a better job of evacuating the solids out of the tank.
Put a dump valve on both sides of the coach.
Only 1 waste tank to combine grey & black.
Use 2 valves on right side & have grey drain connect between the 2 valves. Have a connection in the grey vent to the top of the main tank for the grey to drain into if second valve is closed.

Put in as big as you can - if you are worried about weight, don't fill them.

I only have 145 gallons of waste tank, would be nice to have more, but it is way better than the 30 gallons I used to have.

I haven't noticed a few hundred gallons of water weight making much difference in fuel mileage.

Biggest impact I have found on fuel mileage is dropping the rpms from 2200 to 1750 on the ole 2-stroke. 

[Scott & Heather]

Floyd yes the tunnel is still there in the 102's. In my opinion it's too big. It isn't housing anything that requires the depth but I think it's part of the structure. Kyle,
You bring up interesting points on the pressure and evacuation of the tank when dumped. Making me think. How structural are the thin sheet metal separators between the bays? Can I remove them? Making one big basement?


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