Hey all!
Installed a new toilet in our bus the other day and it worked great for a few days, then the day before yesterday, I noticed the floor was wet around the base of the throne. I thught that maybe I had missed or something in the middle of the night. (At least that's what Cat would accuse me of).
I dried it up as well as I could but later in the day, it was soaked again. I was kind of afraid I had cracked the mounting flange like I had on the old toilet, but I determined that the water was coming from the nylon/plastic fitting on the vacuum break where it connects to the incoming water line.
I took it apart, wrapped it with teflon tape, put it back, and it was worse. So I took it off again and looked at it carefully. Hmmm, some dummy, while installing it had cross threaded it. I tried plumbers putty, pipe dope etc, but nothing would cure the leak. There was always that drip, drip drip after about 30 minutes.
I, being economy minded as we all know I am, (Cat says I'm Cheap!), I hated to go buy a brand new 90° threaded fitting, so I looked around and found some butyl tape that was left over from a roof vent I'd installed on a camper. I thought to myself, well, why not!
I got a small piece and worked it in my hand until it was warm and pliable. I then pushed it into the threads on the fitting as tightly as I could.
When I put the fittings back together, Viola! no leak. It's now been over 12 hours and still no dripping.
I don't know if this is a recommended usage for this stuff or not, but, since no one should be drinking from that area, I figured it couldn't hurt!
Just my tip for the day.
Dallas
Dallas,
Glad it worked, at least for now.
It seems that us Bus Nuts have lots of leaks, FUEL, OIL, WATER ETC., ETC., ETC..
A very much written about topic as of late.
Some one should write a book about that stuff, are you game? ;D ;D
Installed a new toilet in our bus the other day and it worked great for a few days, then the day before yesterday, I noticed the floor was wet around the base of the throne. I thught that maybe I had missed or something in the middle of the night. (At least that's what Cat would accuse me of).
That never happens, right?
Happy Trails,
Paul
Dreamscape
If it leaks again, get yourself some teflon paste. Wrap the fitting with 3-4 wraps of teflon tape, and apply the paste over the tape. Screw the pieces together, and let the paste set up for about 24 hours. That should cure it.
Or blow two bucks on a new fitting :D
Most Plastic fittings they recommend NOT to use teflon tape. FWIW :)
Quote from: Len Silva on December 19, 2006, 05:32:13 AM
Or blow two bucks on a new fitting :D
Len,
For shame!
You mean actually spend $2 on a fitting to do a 15 minute job?
When I could save $2 by working for an hour and a half fixing what I screwed up in the first place ;D ;D ;D ;D ;D ;D
Quote from: Paso One on December 19, 2006, 05:34:05 AM
Most Plastic fittings they recommend NOT to use teflon tape. FWIW :)
Who is "they"?
According to the Plastic Pipe and Fittings Association (http://www.ppfahome.org/index.html) it's ok.
"
What type of thread sealant should I use on threaded plastic fittings?You are always safe to use PTFE Teflon tape (3 mil thickness). If a specific fittings manufacturer recommends a specific brand of thread sealant then it is acceptable to use it on their fittings only. There are many different types of thread sealants on the market and even though some may say they are acceptable for use with plastic fittings they may not actually be chemically compatible. Even some Teflon paste sealants can cause premature fitting failure due to chemical attack. "
I bought a roll of silicone tape for a leak on mine. Worked like a charm. Stuff is easy to use too. Just stretch it out and roll it on. It sticks to itself.
Jimmy
But if you don't want to spend money, and your original solution fails, I suppose you could always just tie some used up underwear around it.
;D
Lasco the largest manufacturer of plastic fittings recommends no teflon tape.
But I was referring to Sealand toilets and tetford as I believe both toilet mfgs state no teflon. But hay I stand corrected.
I followed your link and I read it said it was okay to use the 3 mil but right below it said to follow MFG recomendations.
I personally think when using teflon tape on plastic fittings people tend to put to much and crack the fitting. That is why the toilet guys say no.
Good quality plastic to plastic fittings USUALLY do not need teflon IMHO
Cheers
The way Cat says your cheap, makes it sound like something bad. Like pervert or lazy!! It is suppose to be a compliment.
Quote from: jjrbus on December 19, 2006, 04:39:37 PM
The way Cat says your cheap, makes it sound like something bad. Like pervert or lazy!! It is suppose to be a compliment.
Jim, I keep trying to convince her I'm not only cheap, but easy too! Trouble is, she doesn't believe me!
I used to work for Goodrich Aerospace, and they had a subsidiary that I visited that makes teflon tape. The plant manager gave me a tour of how its made, and how to use it. Evidently it works not so much by filling in the base of the threads like most sealers do, but rather by making the threads slippery so the fitting is actually tighened tighter than it would be, so the threads seal. As a result of this, he said when you do use it, you should never wrap it more than one time around (some overlap is ok), because the fluid or whatever you are trying to seal can leak out in between the plies of tape.
To use teflon tape on already slippery plastic that can be overtightened does not make sense knowing how it works.
The paste type does actually fill in the gaps, and that is what I always use when I really need it to seal the first time. Even oil base paint works well here.
I have found this to be true in the years I have used various sealers, and it was certainly true on the drain threads on my poly water and waste tanks for the bus.
Personally I avoid teflon tape like the plague - there are lots of better alternatives but the decision to use teflon or not depends on the type of seal. NPT fittings seal by interference on slightly tapered threads - that is an appropriate situation to use teflon. Anytime you have a flange or flared type fitting with straight threads then teflon is definitely not appropiate because the object is to compress the shaped fittings together to make a seal rather than to have the seal effected by the threads themselves.
Rather than using teflon tape I use something called Tru-Blue Rectorseal. It is a pipe dope that remains flexible on the threads but skins up where exposed to air. It is suitable for a wide range of fluids - I'm not sure about petroleum products but it is great on the other liquids we encounter and on propane. It also makes fittings easier to take apart when that inevitably happens.
My favorite is also the Rector seal. Bob, is correct in his statement about the type of fitting. Flare fittings should never have a sealer added to them. If they leak, you must fix the pipe / flare itself - bandaids don't work on this type.
Quote from: Paso One on December 19, 2006, 03:42:13 PM
I personally think when using teflon tape on plastic fittings people tend to put to much and crack the fitting.
That is quite true, and in the link, it also alluded to that. it's very easy to break the fitting if you over tighten, and the teflon makes it easy to overtighten because it reduces the friction.
The problem with not using tape and paste, is that some of the fitting manufactures don't properly taper their fitting threads, and so as you tighten it, you never actually get any tension on the threads. Also, when putting plastic on plastic, the friction without teflon will often seize the fitting before it's actually water tight, and it will leak.
It's definitely a fine line between getting it tight and breaking it.
I agree with gumpy about metal pipe threads, especially on air lines, they leak if some kind of sealer isn't used. They also need something to make them possible to uncouple a few years down the road.
My favorite is the new(to me) liquid teflon, great stuff.
Plastic may be a different story but I still use it anyway. Plastic is easy to crack with too much muscle, sealer or no sealer.
I also only use pipe dope on threads. Threadlocker from Loctite. I stopped using teflon tape because of advice from others in our hydraulic equipment fittings and valves. So I totally agree with others who have posted. It is more difficult to apply, takes a little more time, but is much better than a leak and doing it over again.
If you use teflon on water pipes, only wrap it one to one and a half times, no more.
Happy Trails,
Paul
Dreamscape
I had some problems with teflon tape on my water system. My pump developed a small leakback, which would cause it to cycle when not being used. I finally took it apart, and found pieces of teflon tape in the diaphrams. Removed the debris, added a screen to the inlet, and have not had any more problems. I'm more careful when applying tape or paste to threads now, and try to avoid getting right down to the first thread.