Plumbing errors discovered after a building is tiled are among the most expensive remediation jobs in Nigerian construction. This room-by-room checklist prevents those issues by ensuring every critical specification and quality checkpoint is addressed using genuine plumbing pipes and fittings in Lagos.
Pre-Installation: Design & Specification Phase
- Hot and cold water supply routes confirmed with architect and MEP engineer
- Water pressure at mains or overhead tank/booster pump verified (target: 1.5–3.0 bar)
- All sanitary ware rough-in dimensions confirmed with plumber before blockwork chasing and floor screeding begin
- Drainage fall calculated and confirmed (minimum 1:40 for horizontal waste runs)
- Correct pipe material selected: PN20 PPR pipes for hot and cold pressurised supply, heavy-gauge uPVC pressure/drainage pipes for soil and waste lines
First Fix: Rough-In Stage
- All PPR fusion joints inspected and supply pipes pressure-tested to 1.5× working pressure before wall plastering
- Concealed cistern frames bolted securely to structural blockwork/slab and levelled
- Floor drain traps and shower channel drains set to final tile thickness level
- Dedicated power and hot-water feed lines installed for Ariston water heaters with brass isolation and pressure-relief valves
Second Fix: After Tiling & Handover
- Chrome angle valves, basin mixers, and shower trim fitted only after tiling and grouting are complete
- Concealed cistern flush plates mounted and dual-flush volume calibrated
- Final 24-hour flood and flow test with all fixtures open before client handover
- All brass gate valves, ball valves, and non-return check valves confirmed operational
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