just went camping a couple days: used jayco class c for first time, black water drained fast when I pulled t handle ok, when I pulled grey water handle I thought it would never get done draining is this the norm? thankyou ahead of time. dabrown
black & =white/ i mean grey
- Thread starter dabrown
- Start date
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Tom
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It's obviously a function of how large the two (or three) tanks are, and how full they are. The grey tank has a smaller diameter drain, so it will likely drain slower. There might also be a vent issue slowing the draining.
Rene T
Site Team
One of my gray tanks has a 3" drain and the other gray tank has a 1-1/2" drain. That one drains slower.
scottydl
Site Team
Perceived problems like this are one reason I like to have the clear elbow attachment "leading off" the dump hose. I can see what's going on / rushing by during the dump procedure, if something isn't going the way it's supposed to.
This is likely more of the issue. Gray water will drain at half the speed if/when the drain pipe is half the size. I'm not sure if that (half size = half speed) is how it actually works out in term of volume/physics, but you get what I mean.
Rene T said:
This is likely more of the issue. Gray water will drain at half the speed if/when the drain pipe is half the size. I'm not sure if that (half size = half speed) is how it actually works out in term of volume/physics, but you get what I mean.
scottydl
Site Team
To clear hair clogs (whether RV or home) I suggest a pot of boiling-hot water poured straight down the drain. (Watch out for splashback, it will burn you!) In an RV you could do this when the gray valve is open so the water/clog has someplace to immediately go.
This method is free and works just as well, and often better, than any chemical drain cleaner... which partially works because the chemical reaction causes extreme heat to break up the clog down in the pipe. You can do the same thing with just water!
This method is free and works just as well, and often better, than any chemical drain cleaner... which partially works because the chemical reaction causes extreme heat to break up the clog down in the pipe. You can do the same thing with just water!
SeilerBird
Well-known member
I wish I still had enough hair to clog a drain. :-[Rene T said:
taoshum
Well-known member
SeilerBird said:
Yes, some folks just don't know how lucky they are...
Gary RV_Wizard
Site Team
Plumbing standards call for 1.5" pipes for gray water and 3" for black. Those are minimums and there is no reason that RV makers couldn't use a 3" drain line on a gray tank, but they rarely do so.
Since the volume of water through a pipe varies with the square of the pipe radius, the 1.5" gray drain flow is actually 1/4 that of the 3" black drain. Odds are the gray tank is larger than the black as well.
Since the volume of water through a pipe varies with the square of the pipe radius, the 1.5" gray drain flow is actually 1/4 that of the 3" black drain. Odds are the gray tank is larger than the black as well.
scottydl said:To clear hair clogs (whether RV or home) I suggest a pot of boiling-hot water poured straight down the drain. (Watch out for splashback, it will burn you!) In an RV you could do this when the gray valve is open so the water/clog has someplace to immediately go.
This method is free and works just as well, and often better, than any chemical drain cleaner... which partially works because the chemical reaction causes extreme heat to break up the clog down in the pipe. You can do the same thing with just water!
Thanks Scott, will try this if it doesn't improve today when we empty!
