Plumbing Nightmare

[clarence]

I personally would not be too concerned. As someone else has said the operating pressure is very low. I have a setup with a mag 12 return on 3/4 inch pipe. I wrap the pipe ends with teflon tape and press them together. I don't use glue in case I want to make changes. I have used this type of plumbing on my pond outside for years with no problems. My tank has been up and running for almost a year. My setup is in the basement and there is a floor drain under the tank. I would use glue if I was in rental or condo unit and did not have the drain in the floor. Clarence

[MikeInToronto]

I'll tell you two things.
1) There is very little chance you will have a problem with the joints. It takes years and years before the bonds will break and more than likely you will have moved on to another tank or different plumbing.
2) I would still redo the plumbing just for peace of mind. As long as your tank is set up you will always have the fear that the plumbing is going to fail. The time and money spent to redo the plumbing is well worth that peace of mind.