| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. WATER SUPPLY AND PRESSURE REQUIREMENTS | |||
| A1 | Water supply pressure ≥ 2.8 bar (0.28 MPa) at most remote sprinkler head Acceptance: Pressure gauges installed at supply point and remote zone; minimum 2.8 bar maintained under design flow conditions | Cl. 4.1 — Water supply and pressure | OK NC NA HOLD |
| A2 | Water flow rate verified ≥ minimum design flow per sprinkler head (typically 10-15 l/min) Acceptance: Flow measured at each zone outlet; design specification verified; no water deficit conditions | Cl. 4.2 — Flow requirements | OK NC NA HOLD |
| A3 | Water supply source capacity sufficient for system demand (volume check performed) Acceptance: Tank volume ≥ design specification; overflow discharge verified; tank clean and sediment-free | Cl. 5.1 — Supply tank/source sizing | OK NC NA HOLD |
| A4 | Main isolation valve and strainer installed at supply inlet; accessible and labeled Acceptance: Gate valve installed; strainer ≥ 100 mesh; bypass strainer if size > 100 mm; labeled 'MAIN ISOLATION' | Cl. 5.2 — Main valve arrangement | OK NC NA HOLD |
| A5 | Check valve installed to prevent backflow from system to supply source Acceptance: Swing check valve with at least 0.15 bar cracking pressure; functional test passed | Cl. 5.3 — Anti-siphon protection | OK NC NA HOLD |
| A6 | Pressure relief valve set, sealed and tagged with setting documentation Acceptance: Relief valve pressure set to max 5.5 bar; tamper seal applied; test certificate attached | Cl. 5.4 — Safety controls | OK NC NA HOLD |
| B. SPRINKLER HEAD INSTALLATION | |||
| B1 | Sprinkler heads spaced correctly per design (K-factor/coverage area verification) Acceptance: For pendent heads: max 2.5 m × 2.5 m spacing (≤ 6.25 m² per head); measured and documented | Cl. 6.1 — Head spacing | OK NC NA HOLD |
| B2 | Sprinkler head mounting height and alignment verified (typically 20-50 cm below ceiling) Acceptance: Pendent: 15-50 cm below ceiling; upright: 10-30 cm above floor; alignment perpendicular and secure | Cl. 6.2 — Installation geometry | OK NC NA HOLD |
| B3 | No obstructions to sprinkler spray pattern (≥ 45 cm clearance from walls, beams, ducts) Acceptance: Measured clearance ≥ 45 cm from obstruction; spray pattern not deflected > 15° from vertical | Cl. 6.3 — Obstruction clearance | OK NC NA HOLD |
| B4 | Sprinkler frame/arm secure and immovable; no corrosion or visible defects Acceptance: Arm fixed securely; no paint/corrosion > 5% of surface; joint rotation < 2 mm | Cl. 6.4 — Mechanical integrity | OK NC NA HOLD |
| B5 | Sprinkler head bulb rated and compatible with system temperature classification Acceptance: Bulb rating matches ambient: 57°C (orange) for normal, 68°C (red) for high ambient; certificate provided | Cl. 7.1 — Thermal rating | OK NC NA HOLD |
| B6 | Each head factory-sealed and undamaged; sealing caps/covers in place during installation Acceptance: Sealing caps removed only during final flushing; no dirt ingress; visual inspection passed | Cl. 7.2 — Factory finish protection | OK NC NA HOLD |
| B7 | Sprinkler head K-factor (discharge coefficient) matches design specification (e.g., K=5.6, K=8.0) Acceptance: K-factor documented; test sample flow rate within ±5% of specification at test pressure | Cl. 7.3 — Performance rating | OK NC NA HOLD |
| C. PIPING INSTALLATION AND FLUSHING | |||
| C1 | Pipe material approved (steel/GI/copper) with certification; diameter per design (typically 25-50 mm) Acceptance: Steel pipe ≥ 2 mm wall; GI pipe minimum 1.6 mm; mill certificates available; no prohibited materials (zinc) | Cl. 8.1 — Piping material specification | OK NC NA HOLD |
| C2 | All pipe joints welded or screwed; no compression fittings in main system Acceptance: Welds inspected and tested; threads tapered and sealed with PTFE tape; leak test at 5 bar minimum | Cl. 8.2 — Jointing method | OK NC NA HOLD |
| C3 | System flushed thoroughly to remove mill scale, dirt, and debris Acceptance: Flush at ≥ 1.5 m/s velocity until water runs clear; filter cup placed at discharge; flushing log maintained | Cl. 9.1 — Flushing procedure | OK NC NA HOLD |
| C4 | Pressure test performed at 1.5 × maximum working pressure; sustained 1 hour with < 0.2 bar drop Acceptance: Test pressure ≥ 4.2 bar (1.5 × 2.8 bar); test gauge calibrated; test certificate issued | Cl. 9.2 — Hydraulic test | OK NC NA HOLD |
| C5 | Drain valve installed at lowest point(s) with test connection nearby Acceptance: Drain within 1 m of low point; manual ball valve; test point located ≤ 2 m from final outlet | Cl. 8.3 — Drainage provision | OK NC NA HOLD |
| C6 | All pipes adequately supported with clamps/brackets at ≤ 2 m intervals (horizontal); ≤ 1 m (vertical risers) Acceptance: Clamps spaced as specified; no sagging; pipe movement < 5 mm under pressure surge conditions | Cl. 8.4 — Pipe support | OK NC NA HOLD |