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1.Plumbing System in Tall Building

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Plumbing System In tall Building

WATER SUPPLY 

Water Supply System Shall manually connected to Generator



WATER DISTRIBUTION  –  –  –  –

Gravity Tank System Pressure Tank System Constant Pressure System Combined System

Gravity Tank System 

Zone Height (100 m)  Fixtures,Equipment and Materials having

pressure limitations.  High pressure increases the operation maintenance cost 

Tank Size  Event of Power outage water would still available  One hour demand based on

peak gallons/minute demand 

Pump Selection  Discharge based on average gallons /hour

Demand

Gravity Tank System 

Drinking water fountain should be installed in each floor



Types  – Gravity Tank System with Pressure Reducing valve

 – Gravity Tank System without Pressure Reducing valve 

It is ideal arrangement for tall building but expensive

 – Spillback System

With PRV

Without PRV

Spill back

Hot water Distribution System 

Location of Hot Water Generator  Low /High point zone  Low point of zone reduce operation cost  High point of zone reduce the initial cost  Below the Pump/Tank



Distribution  Down Supply System is preferable  Air relief valve shall be provided above the header

 Return Header is an ideal place for recirculation

pump

DRAINAGE AND VENTING 

PROBLEMS  – Spurting Fountain  – Loss of Trap Seal



REMEDDY  – Roof Drain water shall be used for HVAC purpose  – Relief vent shall be provided at 10 floor interval  – Lower floor drains has to be connected below the offset

 – Drain shall design for 1/3 rd full

Material 

The joint used in the pipe material is prime importance  – Threaded /Unthreaded Brass  – Threaded Copper





Length of pipe between two anchorage should not exceed 2.5 m PRV should not be considered for working pressure calculation

REFERNCE 

Tall Building Systems and Concepts Council on Tall Buildings and Urban Habitat (1972)  ASCE PUBLICATION

Th an k i n g y o u

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