Can I box up old HDB toilet piping

In Singapore, particularly for HDB flats, there are strict regulations governing any modifications to the plumbing and sanitary systems, including the piping in the toilet.

- You cannot freely box up or relocate old HDB toilet piping without adhering to the necessary guidelines. Any plumbing work, including modifications to existing pipes, must comply with HDB's drainage and sanitary system regulations to prevent issues such as blockages, leaks, and structural damage.
- Pipes cannot be relocated freely; their placements must remain as per the original design unless specific approval is obtained from HDB.
- All plumbing works must be carried out by licensed plumbers who are registered under the HDB Registered Renovation Contractors’ Scheme (RRCS) to ensure compliance with safety and building codes.
- Any hacking of walls, flooring, or structural elements, which might be involved in boxing up old piping, requires prior approval from HDB.
- After any waterproofing or plumbing work is completed, an HDB-appointed inspector will conduct a mandatory water retention test to ensure there are no leaks or other issues.

Failure to comply with these regulations can lead to fines, forced removal of non-compliant works, and other legal consequences. Therefore, it is crucial to engage a qualified and HDB-approved contractor to handle such renovations.