Black water into gray water
At the risk of making some heads spin and starting a war, I have a question. My shower drains into my black water tank - yes it was designed that way - yes it is RVIA approved etc. The issue is, m...
Forum Discussion
Hi,
Really nothing to do with the valve size, however the larger valve is handy to let through the clumps of toilet paper.
I personally would not want the shower connected to the black tank, as when the tank is 90% full and you are driving down a mountain road, you might get waste water out of the tank. Bad enough if the grey water ends up in the shower plan - but a real problem if it is some black water mixed in with it.
Back in the 60's most RV's had a combined tank of around 20 - 25 gallons, mostly due to the truck chassis limited to about 8,000 GVWR and the limited HP gas engines at the time - perhaps 90 HP was common. Some might have a 10 gallon black tank and no grey tank at all, or it might have a drain right onto the ground.
RIVA started requiring 2 tanks so that if you did overflow one tank into the shower pan, it would not be black water. I can not understand why this company would take a step so far backwards into allowing black water into the shower pan. Personally it would be a reason to never buy that brand RV.
Kinda like when I looked under one brand of RV back in 1994 and found the shower drain line went from the passenger side to a black pipe, under the driveshaft to the side of the grey water tank on the drivers side. At first I was thinking "I am being to critical" of this situation, however later I was thinking that "How stupid is this design?" When taking a left turn on a mountain road, water can come gushing out of the shower drain line if the tank was full, and water rushed to that side of the tank! And the black water tube under the driveshaft - that was silly enough too. . .
Anyway it is reason enough for me to not buy that brand. They should have designed the RV with a larger grey tank, and drain the shower into that. So no backups can end up getting black water into the shower pan, that is REALLY bad.
Fred.
Really nothing to do with the valve size, however the larger valve is handy to let through the clumps of toilet paper.
I personally would not want the shower connected to the black tank, as when the tank is 90% full and you are driving down a mountain road, you might get waste water out of the tank. Bad enough if the grey water ends up in the shower plan - but a real problem if it is some black water mixed in with it.
Back in the 60's most RV's had a combined tank of around 20 - 25 gallons, mostly due to the truck chassis limited to about 8,000 GVWR and the limited HP gas engines at the time - perhaps 90 HP was common. Some might have a 10 gallon black tank and no grey tank at all, or it might have a drain right onto the ground.
RIVA started requiring 2 tanks so that if you did overflow one tank into the shower pan, it would not be black water. I can not understand why this company would take a step so far backwards into allowing black water into the shower pan. Personally it would be a reason to never buy that brand RV.
Kinda like when I looked under one brand of RV back in 1994 and found the shower drain line went from the passenger side to a black pipe, under the driveshaft to the side of the grey water tank on the drivers side. At first I was thinking "I am being to critical" of this situation, however later I was thinking that "How stupid is this design?" When taking a left turn on a mountain road, water can come gushing out of the shower drain line if the tank was full, and water rushed to that side of the tank! And the black water tube under the driveshaft - that was silly enough too. . .
Anyway it is reason enough for me to not buy that brand. They should have designed the RV with a larger grey tank, and drain the shower into that. So no backups can end up getting black water into the shower pan, that is REALLY bad.
Fred.
