Wavin Tigris M PEX Connectors - Challenges with Metal Compression Fittings Tightening

Hello,

I'm in the process of doing the plumbing and everything on Wavin's pex-al-pert and Wavin's metal compression fittings. We use a hand press with U jaws and, of course, calibrators, deburers, special shears, bending springs, etc.

Everything tightens sensational except for the fittings on the pipes 16. The metal covers are too short and the press clamps only one ring on them. The second one is already outside the metal part and nothing tightens (not even a trace - and even if it was, it would already be outside the connector). How it's possible??? What to do?

Can I move the press a centimeter from the end of the coupler and tighten the second, single ring "by eye"? But how can I be sure then that I will hit the O-ring and not the O-ring?

Advice, please.

Greetings.

Nobody can help me in any way?

add some photos, preferably crimping with an electric crimper.

The system is a system - do not combine anything. You can see the fitting should be clamped in one place.

I talked to an official representative of Wavin - the fitting should tighten in the form of two rings. So there is something wrong somewhere. But even they couldn't tell me why this was happening ...

Can you see a photo of the jaw and the fitting? And the jaw on the fitting?

Hello, it's gone a little bit, because I had to go to the construction site to take pictures, and I'm not there every day. The photos show a press, 16mm pipe crimping stones and a stone applied to the fitting - it is clearly visible that either the fitting is too short or the stone is too long ... What to do?

Added after 1 [minutes]:

You tighten badly. This embossing in the stone should overlap the blue plastic.

OMG! Well, I didn't think of it: / And one blonde and three guys were thinking about it! Do you think I can tighten again on an already tightened fitting? At Wavin, they told me that officially you can't (that the customer has to go for a new connector = spent more money), but unofficially, nothing should happen (this is what the Wavin installer told me when he advised to try another press).

You can. from what you can see, there will not even be a trace that it was tightened twice.

Thanks for the help! After we try it out, I will send you a photo of the final effect.

This is the jaw of the U for sure? From what I remember, U was not superimposed on plastic. But I can be wrong - I have been using TH for several years.

Edit: Looks like the wrong jaws.
This is what the U look like:

http://zaciskarki.com.pl/photos/28/03/89/nowa...egi-szczeka-u16-rems-2803895799_1_orginal.jpg

These are the TH jaws.

Added after 1 [minutes]:

now I just read that wavin has U

You know what? I used to buy U-jaws (because Wavin has them) via Allegro. At least I paid for them. An auction similar to this one:

http://allegro.pl/praska-prasa-zaciskarka-do-rur-pex-al-pex-pro-i4425748870.html

So you say what they sent me are other jaws than the promised U ???

Added after 53 [minutes]:

Unfortunately - on the invoice I have "U profile" and in the case there is a TH profile. I didn't recognize it because I hadn't seen any press or jaws before in my life. So the seller made a mistake ...

Of course, I will buy the correct jaws, but some of the connectors - those already installed - are pressed with TH jaws, even though they should be U.

Now, please advise what to do. Leave as is (two rings instead of three)? Press with the U jaws a second time?

I know it's best to replace them with new ones, but for me it would mean cutting out and re-fitting new pieces, unless I would have to buy 40 connectors, each expensive, damn it.

What to do?

Added after 13 [minutes]:

Or maybe I can cut out the already installed couplings, cut the sleeves, remove the pexes and gaskets from them, put on new o-rings and sleeves and tighten again? After all, the connectors are metal and nothing should happen to the connector itself ... What do you think?

Is it better to do a pressure test and check - maybe it holds enough as is ???

This is a TH crimping profile

Added after 27 [minutes]:

Make a leak test with a pressure gauge at 6 bar, if the pressure does not drop, leave it.

If someone was interested in how the case with U Wavin fittings ended with carelessly clamped TH jaws, I am already saying:

The smallest 16mm pipes, on which only one ring was clamped with TH jaws (and not 3 rings, as it should), we "pressed" with U-jaws.

The pressure test was carried out at 6 bar in a system of 3 initial tests 30 min with 10 min breaks, and then the main test 120 min.

Already during the first preliminary test, there were leaks on the couplings crimped with the TH profile only (nothing happened on the 16 mm pexes pressed with U). It wasn't much, a tiny blob, but a leak is a leak. Before we decided to replace all badly pressed couplings, we decided to press them all additionally with a U-press and see if it worked. It worked. After this treatment, the system survived all tests without the slightest leakage. After the additional overnight test, the pressure gauge did not even budge. We decided not to replace the installation, just leave it as is.

I am aware that such an installation will probably have a reduced service life, but I take the risk myself. If I do something in the coming years, I'll come back here and add it. If someone comes here in a few years and there is no new entry from me, it means that nothing is happening with the installation.

I greet and thank everyone who helped me in this matter.

I have a question about Wavin tubes, which have an unusual wall thickness - 2.25mm, not 2mm like the rest of the manufacturers. I have one tee made of wavin and the tubes are typical of Kana with a 2mm wall. Can I use this tee for these tubes? The nipple will be under the spout so I want to be sure. I will of course do a leak test.

tomjey wrote:

Can I use this tee for these tubes? The nipple will be under the spout so I want to be sure. I will of course do a leak test.

You want to be sure - give a tee of the right diameter. So what if at the beginning it will hold, you will do a leak test and it will not leak. But after years of continuous operation, it may come off, the more so that the Wavin tube connector with a 2.25mm wall is looser than the 2.0mm tube connector.

The guy in the store explained to me that it did not matter because the outer diameter is the same and the metal sticks perfectly from the outside and the 0.2mm more from the inside is nothing. I asked because I knew that the Wavin tubes are slightly thicker. If it were a joint in the wall, I would have ignored it, but that in the spout under the floor I have a little doubt about bio, then forging it will be very difficult and expensive.

If the Wavin pipe has an outer diameter of 20mm and a wall thickness of 2.25mm, then the inner diameter is 15.5mm and the pipe you have inside is 16mm, which is a difference of 0.5mm. As I said before - it may be tight at the beginning, but after some time (maybe never) it may become unsealed. He remembers that in these couplings, the O-ring or O-rings seals everything, and the crimping only holds the pipe.

Buy a new suitable fitting. For the 20-30 PLN saved you will sleep peacefully.

Once, I connected the Wavin pipes with the consoles for Kana radiators. After about a month, 50% of the connections were leaky. There were about 200 connections.

Piotr77777 wrote:

Once, I connected the Wavin pipes with the consoles for Kana radiators.

But probably the 16 / 2.0mm tube - Wavin and Kan have the same diameter, so it shouldn't be a problem

I warmly welcome
I have such a quick question, are there such jaws:

https://rothenberger.com/de-de/pressbacken-standard-typ-u.html

Will they have the right profile for 20mm wavin tubes and connectors ???
is the correct profile is U ??

Cz as I have already tightened the connector with another stone with a different profile (I will add that nothing is leaking but after the appearance you can see that it is not it) can I tighten it once again to be sure with the correct clip ??

please help and thank you for the advice.

Is that also the Wavin Tigris M?

So fast ... I have a 16 by 2.2 PE tube, transparent PE with a blue and red stripe along the entire length. Has anyone experienced something like this? There are blue plastic connectors at the ends of the IMI (TA) connectors. I would like to know what the (company) connector should be used for twisting in the place of the extension of the pipe. I was thinking about something like in the picture or on one side of GW to attach a piece of wawvin pipe or something similar Thank you