Push-in fittings in a plastic and brass versionThis is the most modern system for connecting plastic tubes with the simplest assembly procedure. You simply push the tube into the fitting, and the pressure in the tube together with the gripping edge in the fitting ensure that the tube holds perfectly in the joint. To dismantle the fitting it is enough to release the pressure, press the ring and pull out the tube. With this type of fitting, what matters is the outer diameter of the tube!
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Fitting with a push-on barbThe simplest system for connecting plastic tubes. You only push the tube onto the barb and everything is done! With this type of fitting only the inner diameter matters.
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Fitting with a union nutThe traditional way of connecting tubes. Assembly is somewhat more laborious than with the previous joints. First it is necessary to unscrew the nut from the fitting and pass the tube through it. Then we push the tube onto the barb of the fitting and finally we tighten the nut onto the body of the fitting. With this type of fitting, both the outer and the inner diameter of the tubes matter!
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Fitting with a cutting ringThe most robust way of connecting plastic tubes. First the tube must be cut off perpendicularly. Then we slide the nut from the fitting onto it and insert a support sleeve into the cut end. We fasten the tube prepared in this way to the body of the fitting using the nut. With this type of fitting, both the outer and the inner diameter of the tubes matter.
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