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Author Topic: Plate Exchanger Pipe Threads  (Read 6707 times)

CountryBoyJohn

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Plate Exchanger Pipe Threads
« on: October 02, 2013, 10:33:14 AM »
Ok, I quite surprised I haven't seen any discussion on this matter.  I had a HECK of a time getting my water heater side of my brazed plate exchanger hooked up without leaking this week.  I think I had it hooked up and removed 3 times!  What a pain.  I found out that the threads on the exchanger is not a typical tapered pipe thread.  Standard teflon tape will not be sufficient!  I finally got it to stop leaking by using heavy duty teflon with a bead of pipe sealant "dope" on top of the tape.  Then I cranked down with a wrench till the cows came home.  Has anyone else had trouble sealing up this side of their plate exchangers?
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yoderheating

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Re: Plate Exchanger Pipe Threads
« Reply #1 on: October 02, 2013, 11:54:07 AM »
Nope, I just use pipe dope and a big pipe wrench and it always works on the ones I use. However there are any number of manufactures I assume.
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Scott7m

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Re: Plate Exchanger Pipe Threads
« Reply #2 on: October 02, 2013, 01:43:34 PM »
Yep I used to have that issue all the time on plate exchangers til I discovered the blue monster pipe thread and pipe dope.

I now have some that have tapered threads that seal easier...   
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Michael

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Re: Plate Exchanger Pipe Threads
« Reply #3 on: October 02, 2013, 06:34:12 PM »
I used the flexible connecting tubes with rubber gaskets on each end similar to the ones to hook up hot water heaters.
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Scott7m

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Re: Plate Exchanger Pipe Threads
« Reply #4 on: October 02, 2013, 06:48:01 PM »
Quote from: Michael on October 02, 2013, 06:34:12 PM
I used the flexible connecting tubes with rubber gaskets on each end similar to the ones to hook up hot water heaters.

Anything with o rings works well.   It's hard to find 1" stuff at most plumbing stores around here

1" pex swivels are great too
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Flyfishjt

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Re: Plate Exchanger Pipe Threads
« Reply #5 on: October 02, 2013, 08:38:58 PM »
Will these work I'm thinking about using on my platehttp://www.sharkbite.com/sharkbite/wp-content/uploads/PEX-Swivel-Adapter.jpg
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RSI

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Re: Plate Exchanger Pipe Threads
« Reply #6 on: October 03, 2013, 04:02:11 PM »
Quote from: Flyfishjt on October 02, 2013, 08:38:58 PM
Will these work I'm thinking about using on my platehttp://www.sharkbite.com/sharkbite/wp-content/uploads/PEX-Swivel-Adapter.jpg

Unless the plate heat exchanger has weird ends on the fittings they should work good. Here is a picture of some I just took.
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CountryBoyJohn

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Re: Plate Exchanger Pipe Threads
« Reply #7 on: October 04, 2013, 05:04:33 AM »
Wow!  I think that would've been MUCH easier!  The fittings I used looked exactly like that, but 1 solid piece with no gaskets.  That swivel adapter looks like that would work too!  If I'd have known I was going to have that much trouble, I would've checked with you guys first!  Thanks!
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Flyfishjt

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Re: Plate Exchanger Pipe Threads
« Reply #8 on: October 09, 2013, 08:55:48 PM »
RSI are those shark bite brand swivel fittings and where did you find them? Also I wonder if heat will cause any problems with gasket. Thanks
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RSI

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Re: Plate Exchanger Pipe Threads
« Reply #9 on: October 09, 2013, 09:07:07 PM »
Yes, they are Sharkbite brand. The plastic is about the density of pex. I think it will hold up better than rubber. I ordered them from my local plumbing wholesaler. I am still waiting for the 1" thread x 3/4" pex barbs to come in.
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