Buying Guide
Commercial Laundry Water Requirements: Sizing Storage and Pumping Systems for Philippine Facilities
How much water a commercial laundry actually needs, how to size the storage tank that buffers your supply connection, and how to hold wash-line pressure steady at peak. With the real demand math from a completed 500-bed laundry buildout in Taguig.
Water is the single largest consumable in a commercial laundry, and undersized water infrastructure is the most common reason new facilities miss their throughput targets. This guide covers the three sizing questions every laundry project has to answer: how much water the wash line will draw, how much storage must sit between the supply connection and the machines, and what pumping configuration holds pressure steady at peak.
Commercial Laundry Water Requirements per Kilogram of Linen
Philippine Department of Health guidelines set a minimum of 37 to 50 liters of water per kilogram for public laundries. In practice, well-run Manila commercial laundries operate at 19 to 26 L/kg (Manila resource-consumption study, 2022), with the gap coming from machine efficiency, wash program design, and water reuse. The sizing rule that keeps projects safe: design the infrastructure to the DOH minimum of 37 L/kg, and treat leaner day-to-day operation as headroom rather than a reason to shrink the system. A facility that sizes to its best-case operating number has no margin for peak days, new contracts, or older machines joining the line.
Facilities running steam finishers, flatwork ironers, or hot water wash cycles add boiler feed and makeup water on top of the wash-line figure. Condensate return lines recover hot condensate back to the boiler and reduce that makeup demand, which is why the steam side should be designed together with the cold-water side rather than bolted on later.
Storage Tank Sizing: Buffer the Supply Gap
The storage tank exists to buffer the difference between what your supply connection can sustain and what the wash line draws at peak. Municipal connections in Metro Manila rarely sustain anywhere near commercial laundry peak flow: in the Taguig project below, the site connection delivered a maximum sustained 40 m³/hr against a 178 m³/hr peak demand, so the tank had to carry the difference. That math called for at least 100 m³ of reserve to guarantee the wash line never starves during shift peaks.
| Sizing input | Where it comes from |
|---|---|
| Daily throughput (kg/day) | Production target from operations |
| Design consumption (L/kg) | DOH minimum: 37 L/kg |
| Shift length and peak factor | Operating schedule; 1.6x is a typical peak-hour factor |
| Supply connection capacity (m³/hr) | Utility data or a measured drawdown test |
| Reserve capacity (m³) | Buffers peak demand minus supply capacity across the peak window |
JOHOB supplies modular bolted-panel tanks in FRP, HDG, and stainless steel under the TankSmith brand, with WRAS-certified panels for potable water contact. Standard configurations run 8,000 to 50,000 liters, mid-size builds reach 200,000 liters, and custom-engineered tanks exceed 500,000 liters. Because panels are hand-carried and bolted on-site, modular tanks fit rooftop and basement installations where a one-piece tank cannot be delivered, which matters on space-constrained laundry sites.
Booster Pump and Pressure System Selection
Commercial washers misbehave on unstable pressure: fill cycles run long, detergent dosing drifts, machines throw errors, and rinse quality suffers. The fix is a booster system sized to laundry duty, which for a single-storey industrial facility means low head (60 to 80 m) and high flow (30 to 50 m³/hr), best served by two vertical multistage pumps in duplex configuration with VFD control. The VFD modulates pump speed to hold a constant pressure setpoint across fluctuating demand, auto-alternation equalizes wear between the two pumps, and the duplex layout keeps the line running if one pump is down for maintenance. A hydropneumatic bladder tank absorbs pressure spikes and prevents rapid pump cycling.
For the step-by-step methodology, from fixture counting through motor sizing, see our guide on how to size a booster pump for a commercial building. For laundry work the same five steps apply, with machine rated flows taking the place of fixture units.
The Steam Side: Boiler Feed and Hot Water
Laundries running steam tunnels, presses, or hot wash cycles need the steam side designed alongside the water side. JOHOB supplies industrial steam boilers, steam-to-water heat exchangers, pressure reducing stations, and steam traps and accessories. Boiler feed water adds to total site demand and should be included in the storage calculation, while a properly trapped condensate return network recovers hot water back to the boiler and cuts both makeup water and fuel consumption.
Real Project: 500-Bed Commercial Laundry in Taguig
The numbers in this guide are not theoretical. JOHOB completed a full water infrastructure buildout for a 500-bed commercial laundry in Taguig City that was missing its 30,000 kg/day throughput target on a residential-grade 20,000 L tank and a single fixed-speed pump.
- 108 m³ FRP modular bolted tank (14 x 2.5 x 3 m) with WRAS-certified SMC panels, graded panel thickness 12 / 10 / 8 / 7 mm from base to top
- Duplex booster system: 2x CDL 20-5 vertical multistage pumps, 11 kW (15 HP) each in SS304, 25 to 40 m³/hr per pump at 80 to 120 m head
- Duplex VFD control panel with 2x Inovance VFD, IP54 enclosure, pressure feedback and auto-alternation
- 1,000 L hydropneumatic bladder tank (PN16, food-grade EPDM)
What to Send Us for a Laundry Water System Quote
- Planned daily throughput in kg of dry linen, and your operating shift hours
- Washer count and types (or the equipment schedule if machines are already specified)
- Supply connection data: source (Maynilad, Manila Water, deep well, tanker) with sustained flow and pressure if known
- Available space for the tank: rooftop, basement, or ground level, with rough dimensions
- Whether the facility runs steam or hot water finishing equipment
- Site location, for delivery and installation coordination
We return a written sizing recommendation and configuration proposal within 3 to 5 business days.
Frequently Asked Questions
How much water does a commercial laundry use per kilogram of linen?
DOH guidelines set a minimum of 37 to 50 L/kg for public laundries, while well-run Manila operations achieve 19 to 26 L/kg in practice. Design to the DOH minimum so the infrastructure never becomes the bottleneck; treat leaner operation as headroom.
How do I calculate commercial laundry water requirements for a new facility?
Daily kg of linen x 37 L/kg gives daily demand; divide by shift hours and multiply by a 1.6 peak factor for peak-hour flow. Compare that peak against your supply connection's sustained capacity, and let storage buffer the difference.
What size water tank does a commercial laundry need?
Enough to cover peak demand minus supply capacity across the peak window. The Taguig reference project needed at least 100 m³ against a 40 m³/hr connection; its 108 m³ tank provides roughly 14 hours of peak-load buffer. Standard modular configurations run 8,000 to 50,000 liters, with custom builds beyond 500,000 liters.
Do commercial laundries need booster pumps?
Yes, wherever pressure is unstable or the line sits far from storage. A duplex VFD system holds the setpoint across peaks; the Taguig installation stays within plus or minus 2 psi at the machine inlet.
Can JOHOB supply both the water tank and the booster pump system?
Yes. Tanks under the TankSmith brand, pumps, VFD panels, bladder tanks, and piping accessories are coordinated under a single quotation, the way the Taguig buildout was delivered.
How long does a commercial laundry water system project take?
It varies with tank size and site readiness. The Taguig buildout ran 10 weeks from PO to commissioning with civil works in parallel; our project timeline guide breaks down each phase.
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Talk to Us About Your Project
Send us your requirements and we'll return a written recommendation within 3 to 5 business days. Response within 1 business day.
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