Heating oil tank vent and fill pipes repairs

[Sai T.]

I posted this question in DIY but not much response yet.

I have fixed the oil tank air/vent pipe with flexible PVC coupling and fill/service pipe with aluminum tape and compression coupling, but I have not tested it yet by filling it with the heating oil.

Is there a code violation in this repair? And secondly, will the fix last or will this cause an oil spill?

Thank you for your feedback