Pressure tubes disconnecting

[Mr. Lim]

Originally Posted by Mark McLeod

Straight cuts on the tube ends?

It sounds just like they might not be pushed in all the way.
Try pushing them in, then going back and pushing harder.
You should be able to feel if they slide in a tiny bit more.

I've never had a problem with them popping out of the FIRST Choice push-to-connect fittings or the older KOP push-to-connect fittings.

^This

I've had problems in the past if tubing is not cut square and clean at the end. An angled cut, or jagged edges will cause issues.

The more common problem I've seen is that tubes are just not pushed in completely.

Push the tube into the fitting as far as you can.

Then pull on the tube firmly, but not too hard. The tube should not come out of the fitting, but the plastic release ring should slide out a bit.

Push the tube in again, and pull firmly again. The tube should go in a bit further when you push, and when you pull, the release ring should slide out even more.

Repeat until the tube is in as far as it will go, and the release ring is as far out as it will go. In fact, the release ring should feel "loose," like it will rattle around a bit. It should reach the same position as if there was no tube installed at all.

If the release ring is still pressed in after installing the tube, and feels "tight," you need to push and pull the tube in farther.