Replacement of RTR pipes to UPVC Pipes for Underground Network of Fire and Potable Water Line is acceptable under following conditions;
1. All pipes, fittings, and connections shall be pressure rated at PN16.
2. Material specification 12PV0U shall be followed from SAES-L-105.
3. Class 5 uPVC glue shall be used for pipe sizes less than 200mm.
4. The change will be affective only after all related dwgs/ specs are resubmitted for approval.
5. The change is considered a voluntary suggestion from IC and acceptable only if no extra cost and time impacts are added to the project, even if market rates of uPVC are higher than RTR.
6. As mentioned in the TQ, IC is proposing to save time by this replacement. The exact amount of time saving shall be given. IC had enough time to procure the items earlier and any delays can not be associated to RTR pipes or approvals for replacements. 
7. SAPMT has the right to claim any cost savings if found that the uPVC pipes are of lesser value than the RTR pipes.