| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. JOINT & FITTING PREPARATION | |||
| A1 | Fitting type and material verification (Tee, Elbow, Reducer, etc) Acceptance: Fitting type matches design drawing; material same as pipe (UPVC/HDPE/PPR) | Verify fitting appropriateness | OK NC NA HOLD |
| A2 | Pressure class compatibility (Fitting class ≥ Pipe class) Acceptance: Fitting class A if pipe is A; no lower class fittings in system | Ensure system pressure rating integrity | OK NC NA HOLD |
| A3 | Pipe end preparation (cut square, no burrs, chamfered if required) Acceptance: Cut 90° to pipe axis; no burrs >1 mm; chamfer 1-2 mm on both surfaces | Ready pipes for joining | OK NC NA HOLD |
| A4 | Cleaning of pipe/fitting ends (remove dust, moisture, debris) Acceptance: Dry, clean surfaces; no dirt, moisture, or PVC dust before cementing | Ensure clean joint interface | OK NC NA HOLD |
| B. SOLVENT CEMENTING JOINTS (UPVC/PVC) | |||
| B1 | Cement type and quality (Approved solvent cement per IS 4985) Acceptance: ISI marked cement; correct formulation for pipe class/size; expiry date valid | Use specified adhesive | OK NC NA HOLD |
| B2 | Cement application technique (Primer if required, even coat on both surfaces) Acceptance: Primer applied if recommended; cement applied uniformly to pipe OD and fitting ID | Proper joint preparation | OK NC NA HOLD |
| B3 | Assembly procedure (Push socket fully into fitting within time limit) Acceptance: Socket pushed fully onto spigot within pot life; held for 30 secs; marks level | Ensure full depth seating | OK NC NA HOLD |
| B4 | Joint curing time observed (minimum 24 hrs before pressure test) Acceptance: No flow/water through joint for 24 hrs minimum; temperature >15°C during curing | Allow adhesive to set | OK NC NA HOLD |
| C. MECHANICAL/COMPRESSION JOINTS (UPVC/HDPE) | |||
| C1 | Compression fitting assembly (O-ring, ferrule, nut properly seated) Acceptance: O-ring present and lubricated; ferrule seating correct; nut hand-tight plus 3/4 turn | Correct mechanical assembly | OK NC NA HOLD |
| C2 | Tightening torque verification (if applicable, wrench tightness recorded) Acceptance: Torque per fitting spec (typically 20-30 N·m); no leakage when tested | Adequate sealing without over-tightening | OK NC NA HOLD |
| C3 | Visual leakage check at connection Acceptance: No visible leakage from joint; dry connection at rest | Verify joint integrity | OK NC NA HOLD |