Model # C633WHD34

Internet #204620217

Store SKU #682663

null 3/4 in. Copper Pressure C x C Union
0039923359759

3/4 in. Copper Pressure C x C Union

$6.81 /each

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Product Overview

The lead-free wrought copper solder pressure union is used in residential and commercial systems such as potable water, air conditioning and refrigeration. The union features solder cups. These fittings are used to allow repair to the line without damage. In addition to its inherent qualities of beauty, durability and low maintenance, copper’s reusability makes it an ideal application in sustainable projects.

  • For copper construction
  • Used with types L and M hard-temper copper tubing
  • Used aboveground for water supply piping
  • Allows for disassembly without cutting supply tubing

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Customer Questions & Answers

3/4 in. Copper Pressure C x C Union
3/4 in. Copper Pressure C x C Union

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Can this be used for gas application?

This question is from 3/4 in. Copper Pressure C x C Union
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January 16, 2016
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Answers (2)

Asked by
Antioch, CA
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Home Improvement Profile: DIYer
June 4, 2016
Answer: 
No. Need flare fittings when it comes to gas connections.
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Asked by
Philadelphia, Pa
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March 13, 2016
Answer: 
no
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1 answer

who is the manufacturer?

This question is from 3/4 in. Copper Pressure C x C Union
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gales ferry, ct
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March 28, 2016
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Answer (1)

March 29, 2016
Answer: 
This product is from NIBCO.
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Customer Reviews

3/4 in. Copper Pressure C x C Union is rated 1.5 out of 5 by 19.
Rated 1 out of 5 by from NEVER, NEVER, NEVER BUY AND USE THIS COUPLING!!! NEVER, NEVER, NEVER BUY AND USE THIS UNION!!!! They LEAK!!! They evidently do not stay round when you heat them for soldering and when you try to mate them together they are not the same shape so they leak. I have tried sealant etc. and it still leaks "SERIOUSLY" ! My only option is to (unsolder it) replace the union with a threaded BRASS union. I will repair it by using 2 sweat on threaded male adapters and a threaded brass union. I can not explain how dissatisfied I am with this item's performance. If you have read this.......... don't even try using this copper sweat on union!!! I am 82 years old and have been doing this kind of thing for 65 years. Never have I found such a piece of junk!
Date published: 2016-09-07
Rated 2 out of 5 by from I used this NIBCO product before with success. But, in my latest project, the union fittings con... I used this NIBCO product before with success. But, in my latest project, the union fittings continued to leak even after tightening them with very much force using 18" pipe wrenches. I replaced them with EPC (Elkhart Products Corporations) unions purchased from an Ace hardware store. I tightened the EPC unions snugly using 12" (smaller) wrenches. I turned on the water and was very very relieved there was no more leak. After looking closely at the two union designs, I understand the reason. The EPC unions have a deeper taper on the mating surfaces than the NIBCO ones. This difference allows the EPC unions to be better able to self-align as the nut is tightened. I successfully used the NIBCO fitting in previous jobs because they were used in relatively long sections of piping where accurate pre-alignment was easy to do before the nuts were screwed on. In the latest job, the unions were close to elbows and the appliance (water heater), making it harder to align the pipes accurately enough for the NIBCO fittings, which, due to their design, could not self-align well. Here are some additional suggestion on using unions successfully: 1. Apply very thin coating of flux (especially tinning flux) on the pipe and inside of the union, which will minimize the possibility of solder flowing onto the mating surfaces from the inside. 2. After sweating, use plumber's grease on the mating surface and on the inside surface of the nut's lip, which will help the union to self-align better.
Date published: 2017-01-01
Rated 1 out of 5 by from Usually I'm a pretty savvy shopper and don't like wasting my money nor time, so I read reviews be... Usually I'm a pretty savvy shopper and don't like wasting my money nor time, so I read reviews before buying things. In this case, however, the part was simply a coupling AND it was recommended to me by a Home Depot worker. When I asked, "Just out of curiosity, where are the compression fittings?", I was told to keep away from them because "they're known for failing at 2am!". I happily left with two, which is what I needed to install the whole house water filter for my in-law. A simple job in theory. I turn off the water, make my cuts into the main line, install the filter and turn the water on. LEAKS! But only one of them. Oh...no problem. I must have...hmm...maybe not tightened it enough. At some point I made the thing so tight I was afraid I would crush it. After about 30 minutes of loosening and tightening to assure it wasn't me just not "lining it up correctly" (I don't know), I spent another 20 minutes desoldering the thing to take it off! And before desoldering, I had to drain the line! Back to the home depot. Turns out they didn't even have compression fittings, so I bought a sharkbite. They're expensive as heck, but I've used them before and they've never failed. Spend another ten minutes getting the solder off of the ends so the sharkbite could fit on it nicely, turn the water back on....****NOW THE OTHER ONE IS LEAKING****. You guessed it. Spent another 30 minutes tightening and loosening, hoping against hope that the stupid thing would do it's job. Searched videos on installation techniques (didn't find any, which should have been a sign). I mean, it's not rocket science, but I figured at this point for two of them to be failing, it *must* be something I'm doing wrong. After 45 minutes of *more* time-wasting, I spent yet another 20 minutes draining the line and desoldering THIS union! Now I have to rush to the home depot to pick up another sharkbite because they're about to close. A project that should at most take me an hour (30 minutes with no issues) has now taken seven full hours. My kids are calling me, wondering why I'm still at my in-laws and when am I coming home! Come back to the in-laws, spend more time getting the old solder off the end of the pipes so that the sharkbite fit cleanly. Turn everything on. FINALLY, success! I would say that me trusting that the two unions would actually do their job cost me at minimum an extra five hours, not to mention me accidentally banging my head on a pipe, leaving a nasty gash. Assuming I just wasn't familiar with the union, the next day I searched for how to actually install the thing and ran into this page. My *guess* is that the union should actually be made out of brass and that because it's made out of copper, the shape gets messed up when you solder it, no longer making a perfect connection? But then again, normal pipes are made of copper and we solder those all the time with no issues. Honestly, it doesn't matter. I can't tell you how much you should stay away from this product! When you're working in tight spaces, it's hard enough soldering the thing in without burning the house down! The last thing you want to do is drain a line and desolder in a tight spot. Many times I wished I had my brother-in-law simply because I needed an extra hand. I hope I'm conveying to you the frustration I had using this product. STAY FAR AWAY!
Date published: 2016-11-23
Rated 1 out of 5 by from As others have stated, this thing leaks like a sieve and is impossible to seal, even with pipe do... As others have stated, this thing leaks like a sieve and is impossible to seal, even with pipe dope. Totally worthless. You're better off using a Shark Bite slip joint connector.
Date published: 2016-11-20
Rated 1 out of 5 by from same as everyone else, bought 2, both leaked, wasted a lot of time same as everyone else, bought 2, both leaked, wasted a lot of time
Date published: 2016-11-29
Rated 1 out of 5 by from Poor quality, leaky fitting Soldering was easy. After thorough tightening, still leaked. No matter how much I tightened, it still leaked at the seat. Cleaned both sides with sandpaper, still leaked. I bought in store so did not see the poor ratings. Also poor casting design on the copper section when trying tighten with an adjustable wrench. Not a well shaped hexagon so wrench keeps slipping. Had to use channel locks instead. Don't bother with Lowe's, there's has the same poor reviews.
Date published: 2016-04-13
Rated 1 out of 5 by from Defective Chinese junk will not seat Installed two with a new water heater (my 10th install) and both leaked due to poor seating/,mating on the machined parts. Have never had this happen before. I can deal with a poor solder job on my part, but this leaking is a manufacturing defect.. Read al the complaints and do not believe your experience will be any better. That's what I thought, and now I have to go to Ace Hardware to get some unions that work like they should.
Date published: 2016-04-10
Rated 1 out of 5 by from Super easy install, leaks from fitting. Had to repair a pipe that had a slow flow of water to it only option was to install this or a sharkbite Because I was going to be soldering in the rest of the pipes went with this it has a very very small leak from the threaded and nut meet. I am now going to need to depressurize a whole system just to loosen it and try adding pipe dope to help seal it.
Date published: 2016-03-13
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