303TG - water tube question

[DTJ9610]

So I finished cleaning out the camper this weekend and parked it in the backyard for the long winter. However as I was cleaning it out I noticed a set of tubes under the bathroom sink that didn't have any antifreeze in them. They appeard to run up and down next to the bath room cold water tube. I don't beleive they are to the outdoor shower as those are under the cabinet (in a cubby). Just curious if anyone knows what these are. If i get a chance I'll take a picture.

[JRTJH]

Could they be the water supply for your outdoor kitchen? About the only thing I see in the Keystone floorplan on that side of the trailer is the kitchen. There could also be a set of low point drains (look under the trailer in that area or an outside shower, those aren't shown in the floorplan. Otherwise, no ideas what you could have, but you definitely need antifreeze in that set of lines or you'll have a "wet environment" in the spring.

[hankpage]

I would have to agree on the outside kitchen and even though they claim that no water remains in the check valve (HEPVO) that is used in the drain (instead of a trap) I would be sure to put some anti-freeze down the outside sink drain. JM2¢, Hank

[DTJ9610]

I'll have to take a pic. They were connected with a strange black hard plastic attachment (for lack of a better way to describe it). Both tubes seem to lead into this. I may have to take off the bottom panel to see if I can't tell where they go to.

[hankpage]

Originally Posted by DTJ9610

I'll have to take a pic. They were connected with a strange black hard plastic attachment (for lack of a better way to describe it). Both tubes seem to lead into this. I may have to take off the bottom panel to see if I can't tell where they go to.

Did you get pink stuff from the outside kitchen faucets????

[SteveC7010]

Might be the vacuum breaker for the black tank flush system?

[SLIMSHADIE]

I believe Steve is right. I think its the black tank rinse. I just blew air threw mine, low pressure like 20-30 psi.

[hankaye]

Howdy All;

The Black Tank Flush system only uses 1 waterline what's the second for???

The check/vacuum breaker valve that was on mine was clear plastic.

Thinkin it might be something else...

hankaye

[DTJ9610]

hankpage - yes I did get pink in the outside sink.

SteveC7010 - it is in a location that would indicate it has something to do with the tank rinse. I'll see.

I did unscrew one of the tubes to see what was in it (when I first found it) and there wasnt any water in it. I will make a point this weekend to get out there and do some additional investigation. I'll take some pics and hopefully we can figure this out.

Thank you again for the input.

[Ron]

Sounds like the Black Tank flush line to me. Yep Ron

[byrdr1]

Originally Posted by SteveC7010

Might be the vacuum breaker for the black tank flush system?

This is what mine does.
Black thing is a black water back flow pressure break. To keep stinky stuff from coming back to main water source. I had a post about his thin a few weeks back.
randy

[DEW]

I too thouight it was the Black Water Flush. I blew some air in it and it looked fine to me.
If it is not the black flush I have no idea what else it is.

[DTJ9610]

So I was filly able to spend some more time looking at this. It does appear to be some kind of backflow/pressure valve. Now that I have that figured out I may have been a bit late at winterizing it. I'll have to see once we get a thaw up here. I tried pumping some antifreeze into it through the outdoor shower, however when I went into the bathroom I noticed some pink on the floor. Sure enough I removed the bottom banel under the bathroom sink and there was a puddle. I couldn't tell from the tubes where it came from so I'll have to try and pump some in again when it warms up.