Fitting (inside thread) with c0onical bottom


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Old 06-18-17, 12:32 PM
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Fitting (inside thread) with c0onical bottom

I have a fitting with a conical bottom (not flat), and it does not seem to lend itself to a gasket. But it leaks (not much), so I wonder, should thread tape (is that what it is called?) be what one should use?

Thanks,

Hans L
 
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Old 06-18-17, 01:00 PM
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You always need to use thread sealant and/or tape if the thread is the seal but with your vague description I'm not sure what it is the seal. Conical suggests a flare fitting. If so the thread isn't the seal the flare is. Post a picture of the part that is leaking. http://www.doityourself.com/forum/li...rt-images.html
 
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Old 06-18-17, 01:08 PM
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Are you referring to a flared fitting?

https://i.stack.imgur.com/jEx4o.jpg
 
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Old 06-18-17, 01:26 PM
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Well, I do not think that it is "flared", but I will attach a drawing (tomorrow; have to run).

Thanks for you answer.

Hans L
 
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Old 06-18-17, 01:30 PM
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When you said "seal", Ray, I remembered that what I named "bottom" is the seat. It is inside a fitting, so I do not think as photo will come out well. I will make a drawing and post it tomorrow (I have to run).

Thanks for your reply.

Hans L
 
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Old 06-18-17, 02:53 PM
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What's it go on?
Sound like it may be a fuel or brake line with an inverted flare fitting.
 
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Old 06-19-17, 08:33 AM
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Name:  Fittings.jpg
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Here is a drawing (an artist I am not!). The fittings are for water to a garden hose. What do you think?

Thanks!

Hans L
 
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Old 06-20-17, 02:18 PM
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Anyone had a look at the drawing. Is it a match?

Thanks,

Hans L
 
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Old 06-20-17, 02:36 PM
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Looks like a brake or hydraulic line not a garden hose. Please post real pictures of the garden hose. Garden hoses are sealed with a rubber washer. If you are trying to plug it here are some examples: https://www.industrialspec.com/shop/...-hose-cpw.html
 
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Old 06-20-17, 03:28 PM
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The garden hose comes later.

The fitting to the left is fitted into a plastic pipe and the fitting to the right has a turn off/on valve on it.

My question is if the female with a conical seat is a match for the male fitting as shown? It looks to me like tread tape is the only sealing that can be used. What do you think?

Hans L
 
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Old 06-20-17, 04:23 PM
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if the female with a conical seat is a match for the male fitting as shown? It looks to me like tread tape is the only sealing that can be used.
If it is a flared fitting no tape is needed. The seal is between the two mating surfaces. If it leaks it isn't tight enough or one of the surfaces is bad.

Please post a picture of the valve and the pipe fitting.
 
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Old 06-20-17, 04:46 PM
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Here are the two fittings, which I have screwed together somewhat.

There is, indeed, a nick on the right one, and I am sure it could allow a leak. However, I am really doubtful about these two metal surfaces (brass) being able to create a seal.

Hans L
 
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Old 06-20-17, 04:51 PM
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Here are a few other pictures.

Hans L
 
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Old 06-20-17, 06:56 PM
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Your description was really confusing and misleading us. You have a drop elbow with a hose bib screwed in. It needs teflon tape and/or pipe sealant (dope) where the hose bib screws into the el.
 
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Old 06-20-17, 09:11 PM
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Sorry that I confused you. Did not mean to. I've learned a lesson. And I will go back to the hardware store and get dope or use the tape I have (although it is a pain not getting the tape twisted; on hte other hand, I do not know how much dope to use).

Thanks to you, Ray, and the others for your help and interest in helping. I will soon have a functioning garden hose again, and I have learned a lot.

Regards,

Hans L
 
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Old 06-20-17, 10:07 PM
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You can use just pipe dope or you can use just tape or you can use tape and dope.

One often recommended brand of sealant is Locktite 565™ PSTŪ Thread Sealant, Controlled Strength
 
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Old 06-21-17, 07:18 AM
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Thanks. I read that

"... Cures rapidly to withstand 10,000 psi..." Am I right in assuming that the curing does NOT prevent the fittings to be separated (unscrewed)!? If that is right, is it difficult to clean out the sealant from a female fitting if you need to reseal?
 
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Old 06-21-17, 07:49 AM
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It comes out easy. Never bothered to clean the thread doe off before reuse.
 
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Old 06-21-17, 07:56 AM
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Its probably not made for it but I bet you could stick a rubber hose gasket inside the fitting in the bottom picture and it would seal up. Not that the dope wouldn't work, just sayin.
 
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Old 06-21-17, 08:07 AM
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Good to know. Again, thanks!

Hans L
 
 

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