Plumbing design for a mixed-use building with stack parking in Vasco da Gama

Shops and apartments over a stilt level with twin mechanical stack parking, eight floors above. We designed the complete water supply and drainage systems.

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Location
Vasco da Gama, Goa
Service
Plumbing: water supply and drainage
Building
Stilt with stack parking, eight upper floors
Codes
NBC 2016 Part 9, IS 2065, IS 1172
Package
17 A0 sheets, April 2026

Water supply

Water is stored in a 75,000 litre underground sump, which includes a 25,000 litre reserve for fire fighting, and pumped by transfer pumps to a 30,000 litre overhead tank that feeds the building by gravity. Every floor has its own isolation valves for maintenance, and showers get hot water from electric heaters.

Drainage

Grey water and black water run in separate stacks, sized from drainage fixture units to NBC 2016, with vents to prevent trap siphonage. Rainwater from the roof and terraces is collected separately to the storm drains. Below the stilt level, drainage is carried under the stack parking to inspection chambers and the underground network.

Drainage isometric from first-floor toilets and kitchen to the inspection chamber, mixed-use building in Vasco da Gama
Drainage isometric from the first-floor toilets and kitchen down to the inspection chamber (sheet DR-109).

Details the contractor can build from

Each toilet and kitchen is drawn at 1:20 in plan and isometric, with every pipe size, slope, floor trap and cleanout located, so nothing is left to be decided on site.

Enlarged toilet and kitchen drainage plan at 1:20 with pipe sizes and cleanouts
Enlarged drainage plan of a toilet and kitchen at 1:20 (sheet DR-109).

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