| Author |
Message |
Dave 102 C3
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, June 13, 2006 - 2:29 pm: | |
Just starting to convert our 1991 MCI 102C3.
During the bathroom removal I noticed that they had plumbed the black water tank vent into the engine air intake just before the air filter.
I had vented through the roof on our last conversion. Any reason I would not want to keep this setup along with a roof vent? |
Donald Lee Schwanke (Dontx)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, June 13, 2006 - 3:29 pm: | |
Why put in a roof vent? You don't need it, just another hole in the roof to leak sometime. You are converting a bus, not making a copycat of an RV. |
Tim Jones (Torquester)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, June 13, 2006 - 6:27 pm: | |
I agree with Don. Two thoughts come to mind...depending on the height of the intake, would there still be the possibility of odor invading your camping space? Could enough negative pressure develop in your tank to suck the overflow p-trap in your toilet dry?
hth, Tq |
Donald Lee Schwanke (Dontx)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, June 13, 2006 - 7:17 pm: | |
I just ran mine out into the wheel well. Years of camping, nobody ever smelled anything. Its purpose is not really a "stink pipe" as most assume, it is actually a pressure relief so that as you add liquid the displaced air can escape. |
Greg Roberts (Gregeagle20)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, June 13, 2006 - 7:33 pm: | |
If I recall the tanks on those buses are integrated into the toilet and the vent that goes to the engine intake comes of of the cavity and causes a draw through the toilet seating area to keep the odor out of the bus. That is a big difference from drawing a negative pressure on an otherwise unvented RV still tank and I would expect you would pull flow through a P trap if connected to the intake. This would not be good. Venting to the wheel well though would make some since. Going through the roof is very easy and not a big deal if done right and resealed now and then. |
Ed Jewett (Kristinsgrandpa)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, June 13, 2006 - 9:00 pm: | |
Mine will go through the roof. I've already welded up a couple of holes, I guess one more will be OK.
Ed. |
FAST FRED
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, June 14, 2006 - 5:58 am: | |
The reason for the roof vent is with a good sized diameter (2inch prefered) is not only will the gas from decomposing waste rise up , but fresh air with 02 will come back down.
The fresh air helps the decomposing waste smell less by growing slower , because of the O2.
The good sized vent also helps when the waste tank is dumped , as most times the air supply is large enough that it wont suck the J traps dry.
On many larger boats air is pumped into the black tank (tiny fish tank sixed pump) so no stench is rising to disturb folks on the upper deck.
In 60 years those RV builders did learn something,
FAST FRED |
Marc Bourget
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, June 14, 2006 - 8:53 am: | |
Is it the fact that 0xygen slows the growth or the fact that it promotes the growth of the "good" (aerobic) bacteria vs the "bad", i.e. smelly, anerobic bacteria? |
Gary Stadler (Boogiethecat)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, June 14, 2006 - 12:03 pm: | |
It'll all grow. Having O2 in the mix allows aerobic bacteria to thrive and they eat sh pooh faster than anaerobic ones, so they win out if allowed to.
Well heck, a lot of anerobic bacteria just don't grow if there's oxygen around regardless...
(Message edited by boogiethecat on June 14, 2006) |
Carroll Sasscer (Carroll4104)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, June 15, 2006 - 9:18 am: | |
Are these black water holding tanks or septic systems?
Carroll4104 |
John MC9
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, June 15, 2006 - 9:46 pm: | |
Carroll -
I was waiting to hear where they put the leach field!
HAR! |