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salem's avatar
salem
Explorer
Jun 26, 2015

Replacing Black Tank Valve

I noticed on our last outing that the handle on the black tank valve was getting difficult to pull open. I was afraid if I didn't get it fixed, and it stuck in the closed position, I'd be in a major jam when we leave again in a few days. Now, I'm the first to admit that I'm no "Mr. Fix-it" kind of guy. I'm the one who usually calls a service man and helps him pay off his new truck, or send his kid to college. I read posts from people like Old Biscuit and Turtle-n-Peeps and many others on this forum and I'm just amazed, as well as a little envious, how much some people know.

Anyway, I looked up how to change the valve on YouTube. There were several videos available that made it looked so darned easy. I just knew it would be a breeze, and I could save probably close to a hundred bucks. I bought the valve at the local RV Center. It was the same brand as the old one, which I took as a good sign. I got started last evening at 5:15, thinking this would be a 30 minute job, at most. Well, at 8:15 DW and I are both under the trailer trying to get it placed just right. I had it in three times, bolted up and ready to go. Ran some water into the toilet, and it leaked all three times. The main problem is getting the gaskets in place, and then trying to maneuver the valve up between the two pipes with very limited room to work.

About this time my good neighbor walks over to see what we're doing. Bill is the kind of guy who can do anything. With his help, we finally managed to get it in just right. Tightened it up, turned on the water, and low and behold, no leaks.

We did manage to have a few good laughs out of the ordeal. I mean, you may as well keep a sense of humor when your hands are working in who knows what. I owe my neighbor a dinner at a nice restaurant.:)

I guess if a guy did this often enough he'd learn some little tricks to make it easier. Maybe the pipes in RV's should have a flexible joint every so often so you could push the PVC pipes apart enough to do a job like that. All in all though, it was a good experience.

18 Replies

  • Getting everything lined up without dislodging the seal can be a challenge and then you can put them in backwards too. I know this for a fact
  • I put some vaseline on the rubber seals to hold them in place while I snugged the screws down....Dennis
  • robatthelake wrote:
    Don't beat yourself up over it! Some of Us are good at fixing mechanical things and some of Us are Not! That's the way it goes. The important thing is that You tried and with the help of Your Friend got it done!


    X2, some won't even try.
  • Don't beat yourself up over it! Some of Us are good at fixing mechanical things and some of Us are Not! That's the way it goes. The important thing is that You tried and with the help of Your Friend got it done!
  • Some units have more flex in the lines than others. It also is much easier with two people than doing it yourself. JMO
  • Maybe some type of a spreading tool would have helped, but you have to be careful to not force something loose somewhere down the line. You may not even know you have a problem till it's too late. What did you use, if I may ask?
  • I replaced mine a few years ago - can't be too hard, right? I was on the verge of major frustration when I decided to go get my other tool box - having the right tools, made all of the difference. I am glad it worked out for you.

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