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 > Shower hose fittings problem

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kejones62

Oregon

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Posted: 07/19/21 04:01pm Link  |  Quote  |  Print  |  Notify Moderator

No, I'm putting the long, tapered connector on the head, and the short nut on the diverter. Swapping the hose end-for-end doesn't help. Both ends of the hose have female NPT, which I can confirm because they easily thread onto another NPT fitting that I have. So the diverter is the odd thread.

The more I look into this, the more I'm thinking that the diverter is actually a "G" thread, aka BSPP (British Standard Pipe, Parallel). The fitting doesn't seem to taper, which could be why the hose won't thread onto it. Apparently BSPP is what is used in much of the rest of the world? Not sure why it would show up on my Jayco, though. I'm going to order an adapter from Amazon and try it.

One other thought - this connector was made to seal with a washer, not with thread tape. BSPP is designed to seal with a washer, but NPT is designed to seal along the threads, not with a washer. So now I'm wondering if we all have BSPP on our diverter, and for some reason I got a bad hose which has NPT instead of BSPP?

wa8yxm

Davison Michigan (East of Flint)

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Posted: 07/19/21 05:00pm Link  |  Quote  |  Print  |  Notify Moderator

agesilaus wrote:

Odd every shower fitting I've seen is 1/2 inch pipe thread, 1/2 NPT.


Likewise.. However you did a bang up job of describing "Cross Threaded" That is you did not thread it on straight. That is exactly what happens if youthread it on like the diagram below

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kejones62

Oregon

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Posted: 07/19/21 05:06pm Link  |  Quote  |  Print  |  Notify Moderator

I've been doing most of my own house plumbing for 30+ years, including a couple fixer-uppers. I spent part of my career as a chemical engineer, which is basically just an overpaid plumber. [emoticon] I actually understand plumbing pretty well. I am not crossthreading here.

JimR 1

Custer South Dakota

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Posted: 07/19/21 06:52pm Link  |  Quote  |  Print  |  Notify Moderator

I am just guessing that the diverter has an odd or different type of thread that was part of the old hose nd shower head. I assume you can buy a new diverter.

Till then just poke some holes in a bucket and hang that from the ceiling and pour in water. [emoticon]


JimR

Dutch_12078

Winters south, summers north

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Posted: 07/19/21 06:53pm Link  |  Quote  |  Print  |  Notify Moderator

I suspect the threads on the D-spud adapter are buggered up in some way.

Valterra D-Spud adapter


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mobeewan

Hampton, Va

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Posted: 07/19/21 07:19pm Link  |  Quote  |  Print  |  Notify Moderator

Some npt fittings are made to seal on the rim of the tapered threads, just like shower hoses using a flat rubber washer does.

One example is Flair-it fittings that use a swivel nut fitting for connecting to male npt threads. They use a seal called a santoprene seal. When the nut is tightened it compresses the seal against the end of the male npt threads and against the fitting.

There are about 6 or 7 of them in my TT. 4 of which I added when adapting my npt threaded captive air tank to the plumbing and a sink sprayer with shut off valve for rinsing skid marks in the toilet.

Rick Jay

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Posted: 07/20/21 11:11am Link  |  Quote  |  Print  |  Notify Moderator

kejones62,

You said "....which is basically just an overpaid plumber". WOW... you must've been making the REALLY BIG BUCKS then!!! LOL

While I don't have loads of experience with RV and shower head fittings, I've never seen any other than the standard fittings. I just had to buy & install a new shower head/hose combo for my parents sticks & bricks home built back in 1964, and things fit right up. It was basically the same model I installed in my RV about 10 years ago. Come to think of it, I didn't even remember seeing any options for purchasing the shower head kits with DIFFERENT sized threads, so that leads me to think there is just a single standard.

Did you have this RV since it was new? Is it possible a previous owner did some "custom plumbing"? I wouldn't think it would be assembled with the wrong fitting at the factory, but who knows? They might have just tightened things up until they didn't leak and ship it off to the dealer if the correct fitting wasn't available. I'm sure it wouldn't be the first time.

I hope you find the resolution to your problem. Please post who you resolved the problem so others reading here can benefit from your experiences.

Good Luck,

~Rick

On Edit: I went to Amazon and under the two star reviews I found this from a verified purchaser: "The nut that attaches to the shower is poorly made. I have three showers, it would only screw on properly to one of them. And it still leaked. The nut is very short and was made of cheap materials. Brass Insert????

I would not recommend this product."


Which is pretty odd that it would fit one shower, but not two others.

I think this could be a case where you'll save time by just bringing things with you to your local hardware store and making sure everything fits before you buy. Or it can give you the opportunity to replace a part (diverter fitting?) so it fits the standard shower extension hoses available.

* This post was edited 07/20/21 11:22am by Rick Jay *


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mr_andyj

Georgia

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Posted: 07/20/21 11:35am Link  |  Quote  |  Print  |  Notify Moderator

There are two different hoses. I have the one on the outdoor shower (same as indoor shower) and I have a portable shower pump/hose that will not interchange. The look the same, but will not interchange. You simply have the wrong hose.

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