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Old 01-17-2014, 05:46 PM   #11
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For me, I just like the idea that the valve was independant from whatever was fitted inside. So the valve is tightened up good and solid, in the right orientation, with a good seal on the o-ring, by the coupler - regardless of what I then plan to do on the inside, be it a hose barb or a dip tube or what-have-you.

P.S. I will refrain from mentioned BSP/T for the sanity of the thread

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Old 01-17-2014, 11:19 PM   #12
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My best guess is it is mostly from a historical rather than a practical reason.
It is my guess that the welded connectors were developed first. Most welded connectors are made with a coupler as it is way easier to make a clean weld with a coupler than a nipple. Weldless fittings were created to emulate the welded fittings without welding, so it makes sense to try and have the same fitting on the inside.

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Old 01-18-2014, 04:13 AM   #13
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Quote:
Originally Posted by JayMac View Post
In short:

Virtually all fittings come in MPT and FPT forms. Why use a coupler + MPT fitting combo when a FPT fitting is all that is required?

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I provide several bulkhead options and only one of them has a female coupler as the innermost fitting. You'd get that version if you want to thread in a bazooka screen. You can also get it with a plain elbow or a barbed elbow to act as a compact diptube.




I think people buy the version with the coupling because it seems like it offers flexibility and an ultimate decision doesn't have to be made right away.

In some (very poorly designed) WL bulkheads, the coupling is there because something had to hold the SS washer and oring from slipping off the pipe nipple.



You can also get our custom bulkhead with integrated diptubes which eliminates the separate thread in compression fitting. In other words, we took your question even further. Why thread a separate compression fitting in at all? Let it BE the bulkhead.

Anyway, this:


Definitely looks better and is easier to clean than this:
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Old 01-19-2014, 10:53 PM   #14
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Quote:
Originally Posted by Bobby_M View Post
I provide several bulkhead options and only one of them has a female coupler as the innermost fitting. You'd get that version if you want to thread in a bazooka screen. You can also get it with a plain elbow or a barbed elbow to act as a compact diptube.




I think people buy the version with the coupling because it seems like it offers flexibility and an ultimate decision doesn't have to be made right away.

In some (very poorly designed) WL bulkheads, the coupling is there because something had to hold the SS washer and oring from slipping off the pipe nipple.



You can also get our custom bulkhead with integrated diptubes which eliminates the separate thread in compression fitting. In other words, we took your question even further. Why thread a separate compression fitting in at all? Let it BE the bulkhead.

Anyway, this:


Definitely looks better and is easier to clean than this:

Thanks for the explanation Bobby.

I'm planning to make my false bottom connect using a QD, and I was planning on just buying a female FPT QD to thread on to the nipple ... but I wanted to make sure I wasn't making a stupid decision by buying the FPT version instead of MPT+coupling.

From what you posted, it seems that there is nothing wrong with assembling it the way I have, so I'll just go ahead and buy it

..that is, unless you say so haha
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Old 01-20-2014, 12:54 PM   #15
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I think you understand it just fine.

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