dreamcrusher
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die, wood rot, die!
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1971 Ford E-300 Shasta Motorhome
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Post by dreamcrusher on Mar 16, 2014 11:06:27 GMT -8
Hiya, We're replacing our roof on a 1971 Shasta Motorhome and had some questions/confusion about the roof vents. Our best guess is that A is a vent for the sink, B is the toilet vent, C is just ventilation for the camper, and D was the refrigerator vent. For the wire running from B, I would guess that it is for the electric flush toilet or the macerator that the original owners had? Shorty says this wire is just dangling from the non-pipe end on the roof.  Roof Vents  Vent A (sink is below, stove is to left)  Vent B (ceiling of wet bath, above toilet)  Vent D (above original refrigerator housing) Thanks everyone for your help and advice on what these are and whether we need to keep them all for the new roof (would we need the refrigerator one if we are installing an electric one and there is already a metal slatted vent in the back of the housing?). |
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Ten
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70 Shasta 16SC + 1964 Airflyte
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Post by Ten on Mar 16, 2014 12:49:12 GMT -8
Here is a stab at it...
Vent A is a drain vent. The aluminum pipe that runs through the counter should run to the sink drain, and tie in somewhere under the sink cabinet. This vent is necessary to allow the drain to run and not airlock. Vent B is a bit of a puzzle, although it may have been installed to handle ambient air and moisture, if the shower were run without opening the roof vent...I am not really sure, as my guess would have been another drain vent going either to the toilet pump system, or possibly a sink if it were outfitted with one. Then again it may have been disconnected from something at some time.
A note here, you might look into using a drain vent that installs beneath the counter. I am at a loss for the name right now, but it would eliminate the need for the riser pipe and one more hole through the roof.
Vent C should be a vent for the waste holding tank. This would allow air in and the waste water to drain smoothly when you dump the holding tank.
Vent D is definitely a refrigerator vent. The Instamatic combo refrigerator uses a heating unit, even on the electric side. It generates a great deal of heat in the process of cooling, and the overhead vent allowed for greater cooling effect. I believe that switching over to a modern electric refrigerator would allow for the elimination of this vent.
I would probably also suggest changing the roof vents (dome windows) for new units as well. The plastic covers are likely to be or become brittle, and when they crack they leave certain leakage. A great option is replacing one or both with a Fantastic Fan vent. They have built-in 12-volt fans. It looks like everything is going to be opened up enough to run a little extra 12-v wiring....
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soup
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"I hate cold Soup"
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Post by soup on Mar 16, 2014 13:12:40 GMT -8
FYI
IMHO,
You should replace any vents on roof with ones made of metal instead of plastic.
Plastic roof parts turn to powder in the sun.
Also the only reason to have a fridge roof vent is if you will be installing a 2 way fridge (gas/electric burners create heat and fumes)
They make metal retro style ones of all vents posted in above pics.
Below is examples and not actual recommendations of venders.
Glad to see your restore thread!!
Usually vent stack caps like A,B, and C are used anywhere there is water draining into black or gray tanks.
D is fridge vent but never seen one like that before.
Ceiling vents (3) many styles to choose from at many different prices.
I would still try to stick with vents that have metal flanges. The flat part of any vent that mounts to the roof with screws.
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cowcharge
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Post by cowcharge on Mar 21, 2014 8:09:01 GMT -8
I suspect the wire is for a TV antenna. Vents A, B and C all look like stinky tank vents from the outside, but I dunno why the pipe for B would end like that, unless it was added, maybe to help get steam out... D is for fridge for sure.
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dreamcrusher
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die, wood rot, die!
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1971 Ford E-300 Shasta Motorhome
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Post by dreamcrusher on Mar 22, 2014 6:11:08 GMT -8
Excellent! Thanks everybody  That would make sense that that's a tv antenna, cowcharge, the PO was super into running all kinds of tv cables/wires everywhere throughout the camper (in some cases, drilling holes through the skin for the cable). Good to know we can eliminate 2 of the vents - I think you guys are absolutely right, that vent B was added by the PO to allow for steam (or whatever his reason was for everything). I'm going to take the inside piping for that one out today and then when shorty replaces the roof, the refrigerator vent and the outside vent B will come off. I bought new vents (all 3), but I think you're right, I should at least get one of the Fantastic ones (for the wet bath). I believe there is already wiring up there, so that would be an easy addition. soup, awesome, thanks for the links! Shorty just bought the 3rd one down, so we should be getting those in a few days. Time to call around for the roofing...thanks guys! |
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farmographer
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Post by farmographer on Mar 22, 2014 7:50:11 GMT -8
There is no vent cover of any sort for our refrigerator vent, I noticed. I found a metal refrigerator drawer in our barn and stuck that over the top for now. BUT would the vent and cover from etrailer that Soup linked to work (I'm guessing). If I don't intend to use the fridge plugged in (so no heat would be produced), could I just get the cover? |
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Post by vikx on Mar 22, 2014 21:23:33 GMT -8
Most refrigerator vents are made for a particular model of fridge. So check your model and the size of the roof hole. You might consider a local RV store to do the research, they may have some vents in stock. They vents are installed with putty tape and I use Dicor self leveling lap sealant as insurance.
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