Shower usage

+1, buy like David I opt for flip flops for the CG showers.

Two things lead to damp toilet paper. One is forgetting to take it out of the shower first. The second is (at least in the RP-179) the black water tank flush seems to have a backflow prevention device that will leak water when the pressure is removed. I was wondering why we had a wet roll since we had not forgotten to remove the roll. Then I saw the device on the blackwater flush line. The next time I used the flush fitting, I checked. Sure enough, there was water in the shower area. This time, I had removed the roll first, so it stayed dry.

I had repurposed an over-the-tank spare roll holder, mounting it on the cut-out under the sink after reinforcing the edge. It works well, but we do have to remember to remove the roll as needed.

Hi! We have a 179 too. How does the black water flush work and do you do it after every septic dump? We can't find info on how to do it! Thanks.

The gray and black water systems are completely isolated from each other and should not impact each other. The only issue where the BW could contaminate the GW is if the dump hose got clogged while dumping BW waste and you had left your GW valve open. Which you should never do anyway as you dump your BW first and then your GW to help clean out the hose.

We were told that before you empty your BW to fill it up to at least 2/3 to 3/4 full, using the flush on the toilet, to make sure there is lots of water in the tank to help flush everything out. You use the BW flush as you are emptying the tank or once the tank is done to just get that any residual gunk out.

Okay. I got a picture. The black object is what I am talking about. It does not leak while pressure is on the hose. However, when pressure is removed, I have seen water, and it appears to be coming from this device. The reason I know this is that twice I have ended up with wet toilet paper. I know the sink is not leaking. It only happens when I flush the black water tank and then, only after I am done and turn the water off and release the pressure.

I would appreciate it if someone else would also take a picture of that is on their 179. Does it also show evidence of water when the flush supply hose is disconnected?

Edit:  Don't bother with a picture. I found out what it is and now know it is defective. It is a Vacuum Breaker/Check Valve. It is to prevent backflow of black water into the hose and water system being used to flush the tank. It is also to prevent siphoning of black water out the flush port if the cover should become loose during travel. The fact of it leaking means I need to replace it. I am looking for alternatives to this plastic part which is way overpriced. I am thinking of this one. Does anyone have experience with it? Is it more reliable?