| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| LINES. DRAINAGE LINE RECORDS | |||
| L1 | Line ID, Pipe Type (RCC/UPVC), Diameter (mm), Length (m), Installation Date Acceptance: All parameters recorded per design | Line documentation | |
| L2 | Number of Joints, Test Date, Water Test Result (PASS/FAIL), Smoke Test (PASS/FAIL) Acceptance: All tests documented with dates and results | Testing records | |
| MANHOLES. MANHOLE RECORDS | |||
| M1 | MH ID, Location, Depth, Pipe Connections, Construction Date, Test Date Acceptance: All MH details recorded, test results filed | MH documentation | |
| APPROVAL. COMMISSIONING | |||
| A1 | Final QC Approval Date, Inspector Name, Signature Acceptance: QC sign-off obtained, system ready for service | Final approval | |
The Drainage Register is the master log for every drainage structure built on a site — manholes, sewer pipes, gully traps, inlets, outfalls, soakaways. For projects with 50-500 drainage features (large layouts, townships, industrial parks), the register is the only way to track which structures are built, tested, and accepted vs which are outstanding.
Per IS 4127:2017 (Code of Practice for Laying and Construction of Sewers), every drainage element must be traceable to: location, design, materials used, tests performed, defects rectified, sign-off authority. The register consolidates all this. Without it, when a sewer collapses two years post-handover, the EPC / PMC has no way to identify which crew built that section, what concrete grade was used, what test was performed.
Initial setup (project start): list every drainage feature planned per drainage drawings — assign sequential ID, GPS / chainage location, type (manhole / sewer / IC), design ref.
During execution: as each feature is built, the register records: - Construction start + completion dates - Material grades + batch refs (concrete, pipe, fittings) - Test results (air pressure, water-fill, visual inspection) - Defects + rectification - Sign-off by contractor + PMC + client representative
At handover: register becomes the as-built drainage record + warranty start point.
Who maintains: Site QA engineer (drainage discipline). Who reviews: PMC engineer + client representative.
1. Untested sections — pipes laid but not pressure-tested. Register catches missing test entries at sign-off review.
2. Missing as-built data — pipes deviating from design alignment (to avoid utilities, rocks, etc.) without updated drawings. Register should note 'as-built per redline marked' at each affected entry.
3. No invert-level verification — invert levels critical for gravity flow; site-measured values must match design within tolerance. Register entry should capture both.
4. Lost backfill quality records — register should reference compaction test number for each backfilled section.
5. No defect closeout — defects noted but not formally closed. Register's defects column needs status tracking + closeout date.
Companion QA/QC: - Manhole Method Statement (QC-DRN-FRM-002) — pre-construction approval - Sewer Method Statement (QC-DRN-FRM-001) — sewer pipe construction - Smoke Test (QC-DRN-TST-002) — drainage leak detection
Codes: - IS 4127:2017 — Code of Practice for Laying and Construction of Sewers (the primary) - IS 458:2003 — Precast concrete pipes - CPHEEO Manual on Sewerage 2013 — National sewerage standard