Water supply: tanks, pumps and pressure
Most Lahore homes store water in an underground tank and an overhead tank, with a motor lifting water between them. The plumbing plan sizes both for the household, places the pump where it can be serviced, and routes supply lines so upper-floor showers still get decent pressure.
Load-shedding affects water too. If the motor cannot run during long power cuts, a larger overhead tank or a pump on the backup circuit keeps taps flowing. Coordinate this with your electrical layout. Hot water needs thought as well: geyser positions, pipe lengths to bathrooms and possible solar water heaters on the roof all belong in the plan.
- Keep bathrooms stacked above each other where possible
- Provide isolation valves for each bathroom and kitchen
- Allow access panels for valves and cleanouts
- Plan a pump on backup power if your area has long outages
Drainage plan for monsoon and daily use
A drainage plan does two jobs: removing wastewater from toilets, kitchens and bathrooms, and getting rid of rainwater fast during heavy monsoon downpours. These systems are usually kept separate so storms do not overload the sewer line and push water back into the house.
Roof slopes, rainwater outlets and downpipes should be sized for intense rain. Porches, car parks and lawns need surface drains that lead away from the house. Basements need extra care, often with a sump and pump to remove any water that enters. Connection to the main sewer and any disposal requirements should be confirmed with the approving authority or society office.
Common mistakes a plumbing drawing prevents
Drain pipes laid without enough slope that block repeatedly. Pipes running through beams. No vent pipes, leading to smells. Showers placed where the floor cannot fall to a drain. A clear plumbing layout plan prevents all of these before tiling begins.
