Fire water reserve

Fire Water Requirement Calculator

The dedicated firefighting water reserve is each system’s design flow multiplied by the run time it must sustain on stored water. Toggle the systems your building has, adjust the typical flows and duration, and read the total in kilolitres. This is an indicative planning estimate — it runs in your browser and stores nothing.

Systems present

Count only the systems your building actually has.

Hydrant / wet-riser design flow (L/min)Typical value — verify NBC Part 4 / IS 3844 for your occupancy & height.Sprinkler system design flow (L/min)Typical value — verify IS 15105 for your hazard class.Required run time on stored water (min)Typical value — verify NBC; residential, commercial & high-rise differ.

0.0 KL

Dedicated fire water storage

≈ 0 litres, held for 60 min of firefighting

0.0 KL

Hydrant / riser

0.0 KL

Sprinklers

This is the conservative sum of both systems. NBC may permit some sharing of storage, or require the larger single demand rather than the strict sum — treat this as a planning start, not the final tank size.

Life-safety notice. This is an indicative planning estimate — not a compliant fire design or a statutory calculation, and never a Fire-NOC-ready figure. The real requirement depends on the occupancy classification, the building height and the Authority Having Jurisdiction. The fire reserve is dedicated: domestic or landscape draw must never be able to deplete it. A licensed fire consultant must design the system and the local fire officer / AHJ signs it off. A wrong number here can cost lives — verify everything against NBC (SP 7:2026) Part 4 and the relevant IS codes.

Turn the reserve into a plan

Fire water tanks Sprinkler systems Size the fire tank Size the fire pump

Related Guides — Deep-dive reading

Fire Water Tanks in India (2026): The Dedicated Reserve That Feeds Everything

The fire-water tank is the reserve that must always be full so the pumps, hydrants and sprinklers have water the moment a fire starts - what it is, how the reserve is ring-fenced, and why a dry tank is the deadliest failure in Indian buildings.

Security

Fire Sprinkler Systems in India (2026): How They Work, Types & When NBC Requires Them

Automatic fire sprinklers control or extinguish a fire at its origin, day or night - and only the head over the fire opens, not the whole building. This guide explains wet, dry, pre-action and deluge systems and where the NBC requires them.

Security

Fire System Approval Process in India (2026): Getting Your Fire Systems Signed Off

The systems side of fire compliance, explained for homeowners and RWAs. How the alarms, sprinklers, hydrants, pumps and emergency lighting in a building get designed to the fire scheme, installed by a competent agency, tested, commissioned, inspected and certified as part of the fire approval.

Security

Related Tools — You may also find these useful

Emergency Exit Capacity Calculator

Does your building have enough exit width for its occupant load? Required width in 500 mm units versus what you provide, with the at-least-two-remote-exits check and a pass/fail. An indicative planning estimate; a fire consultant sizes exits to NBC and the AHJ approves.

Exit Width

Emergency Lighting Calculator

How many emergency luminaires light the escape route if the mains fails? Route length over the spacing plus open anti-panic coverage. A minimum count — you also need a fitting at each exit, stair and direction change. An indicative estimate; a consultant does the lux design.

Escape Lighting

Evacuation Time Calculator

Estimate how long a building takes to clear — pre-movement plus travel time plus flow time through the exits. A simplified hand-calc to sanity-check drills, not a CFD or ASET/RSET analysis; high-rise phased evacuation differs and a fire engineer runs the real study.

Evac Time