A fire reserve tank is not sized on 150 percent of the fire pump's rated capacity. That figure is a pump acceptance-test point under NFPA 20, not a storage volume. The correct basis is the hydraulically calculated sprinkler demand plus the inside hose allowance, sustained for the required duration, then checked against Philippine Fire Code review. TankSmith supplies and installs matching tank and pump systems from 1,000 to 500,000 liters nationwide, commissioned under one contract in 5 to 14 days.
The 150% Pump Capacity Figure: What NFPA 20 Actually Tests
The 150 percent figure buyers ask about does not come from tank sizing standards. It comes from NFPA 20, the standard that governs fire pump acceptance testing. A fire pump has to prove it can deliver no less than 100 percent of its rated capacity at rated pressure, and no less than 65 percent of rated pressure at 150 percent of rated capacity. These are flow test points on the pump's performance curve, confirmed during commissioning with a flow meter and pressure gauges, not a volume calculation for the storage tank feeding the pump. Sizing a fire reserve tank at 150 percent of the pump's rated capacity multiplied by the required duration produces a tank larger than what the fire code or the hydraulic calculation actually requires. On a site with tight roof deck or cistern space, that oversizing can push the project into a bigger tank class than the application needs, with no corresponding safety benefit. The pump curve test and the tank volume calculation answer two different questions: can the pump perform, and does the tank hold enough water. Treating the first number as the basis for the second is the most common sizing error on fire reserve submittals in the Philippines.
Sprinkler Demand Plus Inside Hose: The Correct Tank Sizing Basis
The tank volume for an exclusive fire protection reserve is sized on the hydraulically calculated demand of the system it feeds, not on the pump's test rating. For a wet sprinkler system, that demand comes from the NFPA 13 hydraulic calculation for the most demanding area, plus the inside hose allowance required under NFPA 14 where inside hose stations are installed. NFPA 22 then sets the duration that demand has to be sustained, commonly 30 to 90 minutes depending on the hazard classification of the occupancy, before the tank is allowed to run dry. In practice: sprinkler demand plus inside hose allowance, multiplied by the required duration, equals the minimum reserve volume. That volume is then checked against the local Bureau of Fire Protection reviewer's requirements and the Philippine Fire Code of 2008 (RA 9514) during permitting, since local review can add margin on top of the NFPA minimum. The fire pump is then selected to deliver that same hydraulically calculated demand at the required pressure, which is why the pump's rated capacity should match the sprinkler-plus-hose demand it was sized against, not the other way around.
Why the Two Numbers Get Confused
The confusion is understandable because both numbers appear on the same fire protection submittal and both involve percentages of a flow rate. A design engineer reads a pump curve sheet with 100 percent and 150 percent flow points, then sees a tank sizing worksheet referencing demand, and assumes one derives from the other. They do not. The pump test confirms equipment performance after the demand number is already fixed. The tank sizing calculation sets that demand number in the first place, based on the sprinkler system's hydraulic needs, not the pump that will later serve it. Getting the sequence right matters for cost and compliance. Oversizing the tank on the 150 percent pump figure adds unnecessary material and civil works cost. Undersizing it by skipping the inside hose allowance or using the wrong duration can fail Bureau of Fire Protection review at permitting, or worse, leave a real fire undersupplied. TankSmith sizes the reserve from the hydraulic demand and required duration first, then matches a booster pump system to that same figure, so the tank and the pump are specified from one consistent number instead of two different standards pulling in different directions.
TankSmith Capacity Range and Materials for Fire Reserve Duty
TankSmith supplies and installs modular fire reserve tanks from 1,000 liters to 500,000 liters per system, in FRP, GRP/SMC, hot-dip galvanized steel, or stainless steel 304/316 bolted panels, selected on site access, water quality, and the project's fire code review requirements. Panels carry a 3-year warranty with a 20 to 25 year design life, built from ISO 9001 certified partner factories and TUV SUD tested. Where the reserve also serves potable use, WRAS-certified panels rated for potable water up to 65C and NSF-compliant liners are available. Bolted modular construction lets the tank be assembled on tight rooftop decks, basements, or constrained urban lots where a cast-in-place cistern is not practical, which matters for the hospital, condominium, and high-rise sites where fire reserve requirements are most often reviewed closely by the Bureau of Fire Protection. Because the panels ship modular, the final as-built capacity can be confirmed against the hydraulically calculated sprinkler-plus-hose demand before the tank is finalized, rather than locking in a volume before the fire protection engineer's calculation is complete.
Turnkey Fire Reserve Tank and Pump Systems Under One Contract
TankSmith supplies and installs both sides of the fire reserve system, the tank and the booster pump, under one contract. The pump side uses vertical multistage centrifugal units (CDL/CDLF series, 0.37 kW to 200 kW, SS304) paired with Inovance VFD duplex control panels in IP54 enclosures, with pressure feedback and auto-alternation between pumps. Sizing the pump to the same hydraulically calculated demand used for the tank keeps the two halves of the system consistent instead of specifying them against different numbers. Installation for a 20 KL to 500 KL fire reserve and pump system typically runs 5 to 14 days depending on capacity and how ready the civil works are when the crew arrives, covering mechanical installation, electrical work, and commissioning. Single-team accountability means one point of contact carries responsibility for both the tank holding the correct reserve volume and the pump delivering it at the required pressure, rather than splitting that responsibility between a tank supplier and a separate pump contractor.
Verticals and Nationwide Coverage for Fire Reserve Projects
Exclusive fire protection reserves sized this way come up most often in verticals where the Bureau of Fire Protection reviews occupancy load and hazard classification closely: hospitals and clinics, where redundancy and a code-compliant fire reserve are a permitting requirement, condominiums and high-rise buildings with rooftop tank placement, warehouses and manufacturing sites carrying a fire reserve allocation alongside process water, and PEZA or freeport-zone facilities in Clark, Cavite, Batangas, and the Subic Bay Metropolitan Authority where fire protection sign-off is part of locator compliance. TankSmith covers these projects nationwide, across NCR, the rest of Luzon, Visayas, and Mindanao, including PEZA and SBMA/Clark industrial estates. Because the tank and pump are supplied and commissioned by the same team, the hydraulic demand used to size the reserve carries through consistently from the fire protection engineer's calculation to the as-built tank and pump on site, which is the documentation a Bureau of Fire Protection reviewer or building official will ask to see at final inspection.
Frequently Asked Questions
No. The 150 percent figure is an NFPA 20 acceptance test point for the fire pump's performance curve, not a tank sizing rule. A fire pump must deliver at least 100 percent of rated capacity at rated pressure and at least 65 percent of rated pressure at 150 percent of rated capacity during commissioning. The tank is sized separately, on the hydraulically calculated sprinkler demand plus the inside hose allowance, sustained for the required duration under NFPA 22. Using the pump's 150 percent test point as the tank volume basis produces an oversized tank with no corresponding code requirement behind it.
Size the reserve on the hydraulically calculated sprinkler demand (per NFPA 13 for the most demanding area) plus the inside hose allowance (per NFPA 14 where inside hose stations exist), sustained for the required duration under NFPA 22, commonly 30 to 90 minutes depending on hazard classification. That volume is then checked against local Bureau of Fire Protection review and the Philippine Fire Code of 2008 (RA 9514) during permitting, since local reviewers can require additional margin. The fire pump is selected afterward to deliver that same demand at the required pressure.
NFPA 22 sets the duration a fire reserve must sustain its required demand before being allowed to run dry, typically 30 to 90 minutes depending on the hazard classification of the occupancy it protects. Local Bureau of Fire Protection reviewers apply this alongside the Philippine Fire Code of 2008 during permitting and can request documentation showing the hydraulic demand, the duration used, and the resulting reserve volume. TankSmith sizes tanks against the duration and demand figures the project's fire protection engineer provides, rather than a fixed default, since hazard classification varies by occupancy.
Yes. TankSmith supplies and installs the fire reserve tank and the booster pump system, including vertical multistage centrifugal pumps (CDL/CDLF series, 0.37 kW to 200 kW) and Inovance VFD duplex control panels, under one contract. Sizing both sides against the same hydraulically calculated sprinkler-plus-hose demand keeps the tank volume and the pump's rated capacity consistent with each other. Installation for a 20 KL to 500 KL system typically takes 5 to 14 days depending on capacity and civil readiness, covering mechanical, electrical, and commissioning work with single-team accountability.
TankSmith supplies modular bolted tanks from 1,000 liters to 500,000 liters in FRP, GRP/SMC, hot-dip galvanized steel, or stainless steel 304/316, carrying a 3-year panel warranty and a 20 to 25 year design life. Panels come from ISO 9001 certified partner factories and are TUV SUD tested, with WRAS-certified potable-rated panels and NSF-compliant liners available where the reserve also serves potable use. Modular bolted construction allows assembly on tight rooftop decks or constrained lots common on hospital, condominium, and industrial estate sites.
Related Pages
- Diesel Fire Pump Packages for Buildings in the Philippines
- Diesel Fire Pump Supplier and Installer for Commercial and Industrial Buildings in the Philippines
- Fire Pump Supplier in the Philippines: NFPA 20 Compliant Packages
- Water Tank and Booster Pump Sizing for Apartment Buildings Up to 6 Storeys
- Fire Code Water Tank Capacity Requirements in the Philippines
- Fire Reserve Tank Sizing Under NFPA 22 and the Philippine Fire Code
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