Source for reverse-threaded (non-bulkhead) PVC fittings for greenhouse?

ker_01

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Jan 31, 2009, 2:51:45 PM1/31/09

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Does anyone know where I can get standard-size, but reverse threaded PVC
fittings (1/2", 3/4", and 1" size)? I'm adapting a PVC greenhouse design,
and would need to be able to rotate a series of PVC pipes that cross the
structure and have that motion tighten them on both ends at the same time-
so one end would be standard thread, the other end would have to be reverse
thread.

The alternative is to just glue them all, but then my temporary greenhouse
becomes a permanet greenhouse...

I checked online, but so far the only reverse-threaded PVC I've been able
to find is bulkhead fittings, which isn't really what I need.

Thank you for any suggestions or possible sources,
Keith

Bill

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Jan 31, 2009, 3:07:28 PM1/31/09

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In article <Xns9BA478A...@207.115.33.102>,
"ker_01" <ker...@newsgroup.nospam> wrote:

<http://www.google.com/search?hl=en&client=safari&rls=en-us&sa=X&oi=spell
&resnum=0&ct=result&cd=1&q=reverse+threaded+PVC+fittings&spell=1>

--
Garden in shade zone 5 S Jersey USA

ker_01

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Jan 31, 2009, 3:16:12 PM1/31/09

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Bill <b2fore...@snip.net> wrote in news:b2forewagner-
B636E8.150...@news.supernews.com:

> http://www.google.com/search?hl=en&client=safari&rls=en-us&sa=X&oi=spell
> &resnum=0&ct=result&cd=1&q=reverse+threaded+PVC+fittings&spell=1

Bill- thank you for your quick reply. Prior to posting here, I did
extensive google searching, including the terms you suggested, but did not
come up with any useful hits. That's why I was posting, in the hope that
others might have a more specific suggestions as to manufacturers or stores
where they had seen reverse threaded PVC fittings in the past (if any
actually exist, other than bulkhead fittings). I apologize, as I should
have included in my original post that I had done the courtesy of searching
prior to posting.

I've also cleaned up the search results of this and similar searches by
removing other related search terms- for example, "-osmosis" because of the
large number of sites that have the search terms "PVC" and "reverse
osmosis" in the results, but still no luck in the results. I also found a
number of PVC compression fittings but those also don't meet my needs.

I welcome any clarification, in case there was a specific google hit that
you saw and I missed.

Thank you,
Keith

Sheldon

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Jan 31, 2009, 3:33:26 PM1/31/09

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Sounds like what you want is left hand pipe thread... you can buy LH
NPT taps and dies and do your own threading. There are also systems
that use cast metal fittings to erect structures of pvc and other
piping... the fittings use allen set screws:

http://tinyurl.com/ca5usf

http://www.teksupply.com/farm/supplies/Search?catalogId=10053&catalogId2=10001&ftCatalogId=10001&storeId=10001&langId=-1&division=TekSupply&searchMethod=wcSearch&searchType=ANY&searchBeginIndex=0&searchDefaultPerPage=10&ftSearchBeginIndex=0&ftSearchDefaultPerPage=10&searchQuery=quik+klamps

dpb

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Jan 31, 2009, 3:36:31 PM1/31/09

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ker_01 wrote:
> Does anyone know where I can get standard-size, but reverse threaded PVC
> fittings (1/2", 3/4", and 1" size)? I'm adapting a PVC greenhouse design,
> and would need to be able to rotate a series of PVC pipes that cross the
> structure and have that motion tighten them on both ends at the same time-
> so one end would be standard thread, the other end would have to be reverse
> thread.
>
> The alternative is to just glue them all, but then my temporary greenhouse
> becomes a permanet greenhouse...

...
What about going to flexible plastic and clamp fittings instead? No
glue, still temporary if that's desired.

--

Steve Barker TB

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Jan 31, 2009, 10:18:23 PM1/31/09

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Well you could use unions, (expensive) or just pin the slip connections
with 1/4" bolts and wingnuts.

s

Doug Houseman

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Feb 1, 2009, 8:19:18 AM2/1/09

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In article <4uGdnZn-eNriiRjU...@giganews.com>,

You can always slip fit one joint with a long connector. No glue. If it
is in compression - it will not come apart. I do this for my spring hoop
house. It works pretty well.

Doug

PeterD

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Feb 1, 2009, 8:50:32 AM2/1/09

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If you are going to pin the slip joints I'd use self tapping screws
instead of bolts. Pre-drill, or use self drilling screws.

Cwatters

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Feb 2, 2009, 2:37:46 PM2/2/09

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"ker_01" <ker...@newsgroup.nospam> wrote in message
news:Xns9BA478A...@207.115.33.102...

>
> Does anyone know where I can get standard-size, but reverse threaded PVC
> fittings (1/2", 3/4", and 1" size)? I'm adapting a PVC greenhouse design,
> and would need to be able to rotate a series of PVC pipes that cross the
> structure and have that motion tighten them on both ends at the same time-
> so one end would be standard thread, the other end would have to be
> reverse
> thread.

Perhaps you can use turnbuckles and wire as used on boats. Thread it down
the inside of some pipe if you want ti covered..
http://shop.pinbax.com/items/R9030.jpg

james...@gmail.com

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Feb 2, 2009, 2:47:06 PM2/2/09

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On Feb 2, 2:37 pm, "Cwatters"

I use screws thorugh the fitting if I want to be able to take it apart
later and it does not have to carry water under pressure.