Male NPT x Push Connect fitting problem

[fishstix]

So I am using several of the Male NPT x Push Connect fittings for my reactors, but the tube seems to pop out and pulls the little push fitting out as well. I do have the tube with some rather sharp bends I would assume that the problem. Anyway around this or do I need to figure out another to of hose to use with barbs? I am using BRS reactors, that go into my FMM sensors and then into push fittings on my sump. The ones that keep falling out are the ones that go into the FMM. I think it because where I have the FMM sensors are rather sharp turn.

Thanks

 

[NowGlazeIT]

Bump for help. Maybe post some pictures to give the reefers a clear understanding

 

[reefwiser]

Push connect fittings can not have sharp turns. I am a maintenance man at a large factory 45 years now [emoji3]
First make sure to cut the line straight across. Push the line fully into the connector. Then pull backwards to make sure the line is seated into the connector properly. It it comes out then you mostly have a bad connector. Once the connector is stressed and the line will pull out. Then connector can not be repaired only replaced.