Plumbing disputes generally arise out of poor contractual documentation and/or defective work and/or materials.
Plans often lack critical detail and specifications are often general and not project specific. Pipes and water management systems are often undersized and/or involve long and complicated runs and/or minimum or inadequate falls due to the presence (or lack) of other building elements. Quotations will often omit (deliberately or accidentally) items of work but not expressly state so on their face and may contain estimates for the plumbing works/fitting supply to be undertaken in the form of PC (Prime Cost) or Provisional Sums that are woefully inaccurate for the work/fittings that are in fact required to be undertaken/supplied. Owners will often choose to supply plumbing fittings but will have no idea as whether the fittings are suitable, and if so, what additional items other than basic pipework must be supplied in addition to the fitting itself and will expect the plumbing contractor to assist with selection, specification and delivery arrangements, and all at no charge. Owners will often request changes to the scope of work and specification as work progresses, whether at the pipe out stage or fit off stage, or anywhere in between. Not all plumbing fittings will function as expected, some will be simply faulty (due to manufacturing defects) and some will be damaged during the construction process.
On the other hand, mistakes and errors are a feature of any building related work and some plumbing contractors fail to have adequate quality assurance processes in place to ensure they achieve the agreed/specified scope of work to the specified standard, and/or to complete their work by the due date for completion.
In the circumstances, it is little wonder that plumbing disputes arise from time to time. There are essentially two types of disputes that we deal with: