Can I get restitution on a plunmbing issue on new construction?

If the piping is part of the common element of the building and your description indicates it is, then the owner/developer, general contactor and plumbing sub-contractor may have have potential exposure. That would be dependent upon establishing the cause of the defect. In construction defect cases the inquiry typically involves whether the work at issue complied with the plans and specifications, whether the work was performed properly ie: consistent with industry customs and practices and whether there are contract documents which define the relative rights and responsibilities of the parties. The scope of an insurer's obligation depends upon the provisions of the policy of insurance and the types of damages that were caused by or resulted from the allegedly defective plumbing.

I would suggest that you contact a lawyer to review this matter. The lawyer would be interested in reviewing the contract documents, the warranty you refer to, the various insurance policies if in your possession and all other documents or correspondence you may have received from the owner/developer of the project.