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Hi AlexG, this is for the aquarium system.Is this to connect to a home water supply or are you going to be running aquarium system water thought this plumbing?
You still have to use a metal crimp to secure the pex to the plastic connector. These plastic connectors are normally used on sprinkler systems. Since it’s plastic and soft when you crimp it you won’t get a 100% water tight seal. On a sprinkler/irrigation system a little water leaking into the dirt you’re trying to water anyway this isn’t a problem. In your living room it is.I use Plastic connectors for PEX that doesn't go in the tank. You can get PEX 1/2", 3/4" X Pipe thread plastic fittings from most plumbing supply houses. I don't know about 1" but you could check your local contractor supply house and if they don't have it they can tell you where to get it.
In my post above I said a plastic barbed connector will leak. This is not necessarily true, just always like to use brass just to be sure. Since you’d have to use a plastic barb on an aquarium would recommend using a pex expansion tool to secure it, This would also eliminate any metal on the entire connection, inside and outIf you were connecting cpvc, there is a direct adapter. For pvc this is the best I can come up with. This poly 1" pex to 1" mpt. Then use a 1" threaded/slip pvc coupler to the pvc pipe. Don't use any of the copper or brass fittings. I would use stainless if I had to, but you can get the pex poly, so no need. I just hate threaded fittings and prefer slip and glueing. In place of the coupling, you could use a threaded/slip union also that would allow you to take it apart.
OR IN PLACE OF ABOVE COUPLER USE UNION:
Yes possible because they are ment to be used with crimp rings.barbed connector will leak
I indicated that it was NOT for submerged use, so the metal crimp ring is not an issue. However, I use these on my water station piping and haven't had a single leak in several years. With all that said I DON'T use them on tank plumbing with reef water flow. All of the connections on any water flowing thru the reef are Sch 80 PVC.You still have to use a metal crimp to secure the pex to the plastic connector. These plastic connectors are normally used on sprinkler systems. Since it’s plastic and soft when you crimp it you won’t get a 100% water tight seal. On a sprinkler/irrigation system a little water leaking into the dirt you’re trying to water anyway this isn’t a problem. In your living room it is.
I tried to correct/edit this post you quoted but apparently you can’t once it times out. So instead made another post, above, in an attempt to correct it. As a plumber for many years my old school thinking told me metal is better, as many plumbers avoided barbed plastic pex connectors too. In recent years they have gotten better and are used without issue often nowadays. Would still recommend using a pex expansion tool with plastic pro-pex fittings when using plastic connectors. YmmvI indicated that it was NOT for submerged use, so the metal crimp ring is not an issue. However, I use these on my water station piping and haven't had a single leak in several years. With all that said I DON'T use them on tank plumbing with reef water flow. All of the connections on any water flowing thru the reef are Sch 80 PVC.
With the PEX on the water station Worst case for me would be a small leak on the garage floor