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Old 02-14-2011, 08:21 AM   #1
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Interior Plumbing Vent and cap the outside?

I have a pretty vintage 64 overlander, in that just about everything is original - except the plumbing vents. I need to replace them. I was wondering though if anyone has considered using 1 way plumbing vent valves - such as are used in kitchen island sinks? (Air admittance valves (AAVs or Durgo valves) I put one in my old house because I couldn't tie into the cast iron pipe and it handled the sink and the dishwasher drains just fine.

Would it seriously detract from the value of a vintage trailer by replacing those exterior vents and just getting 3 squares of aluminum to patch the spots? It would avoid any rusting in the future, and would make the trailer more air efficient (by about .003% maybe)

Last, do I need to worry about trying to patch '64 era aluminum with something modern? Recommendations on getting an exact match?

Thanks,

Rob.
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Old 02-14-2011, 10:57 AM   #2
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I wouldn't recommend this. If you use an AAV, air can get into the system, but gases can't escape.

An AAV works in your house because the system you are draining into has a main vent. This lets sewer and fermentation gases escape to the atmosphere. Without this vent, gases will vent by blowing the water out of your P-traps.

The correct aluminum to match the original is 2024-T3 Alclad, 0.32". It will not look llike your current skin because the skin has oxidized for almost 50 years. It will match if you polish the existing skin.
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Old 02-14-2011, 11:42 AM   #3
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I wouldn't recommend this. If you use an AAV, air can get into the system, but gases can't escape.

An AAV works in your house because the system you are draining into has a main vent. This lets sewer and fermentation gases escape to the atmosphere. Without this vent, gases will vent by blowing the water out of your P-traps.

The correct aluminum to match the original is 2024-T3 Alclad, 0.32". It will not look llike your current skin because the skin has oxidized for almost 50 years. It will match if you polish the existing skin.
OK, so I'm off a little on the aluminum. Probably best to use 0.032" thickness, rather than 0.32".

Here is how I did the vents on my '59. The vent is from VTS, the gasket material is fiberglas reinforced red silicone and the screens are a tea strainer, both from ACE or True Value.
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Old 02-14-2011, 12:08 PM   #4
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that's just beautiful. thank you. and thanks for the feedback, the off gassing makes sense.
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Old 02-14-2011, 12:09 PM   #5
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where did you get the fiberglass silicone, and did you screw or rivet that on?
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Old 02-14-2011, 01:27 PM   #6
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where did you get the fiberglass silicone, and did you screw or rivet that on?
I don't recall. It may be cloth reinforced BUNA-S instead of silicone. Either should work. It comes in 6 x 6 sheets at your local hardware store.

Held on with SS screws. You should take apart every couple of years to check for blockage and refresh the gasket material.
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