100,000-Liter FRP Panel Tank for a Commercial Laundry Facility, Taguig

The Client and Their Water Challenge

Sogo Laundry and Dry-Cleaning Inc. (Sogo LDI) operates a commercial laundry facility in Taguig City serving hotels, hospital linen suppliers, and corporate uniform programs in the BGC corridor. Their operation runs two shift cycles daily, processing large volumes of linen, uniforms, and specialty garments through industrial wash and dry equipment.

Commercial laundry is one of the most water-intensive facility types in the Philippine commercial sector. A full production day at Sogo LDI's scale consumes approximately 40,000 to 55,000 liters of water — a rate that makes supply interruptions directly operational. A two-hour outage from the distribution main during peak processing hours translates to a delayed batch, a missed hotel delivery window, and a client-facing service failure.

At the time of project engagement, Sogo LDI had two 5,000-liter polyethylene tanks providing a combined 10,000 liters of backup — roughly 15 minutes of full production capacity. When the Maynilad supply experienced a pressure drop during a routine infrastructure maintenance window in Q4 2025, the facility was forced to pause operations for four hours. The decision to install proper backup storage followed immediately.

Requirements and Constraints

Sogo LDI's operations manager specified four requirements for the water storage upgrade: (1) a minimum of 24 hours of backup storage at average daily consumption — approximately 50,000 liters minimum, with preference for 100,000 liters to cover two full production days; (2) WRAS-certified potable-grade tank panels, consistent with the facility's water quality requirements for wash cycles; (3) BFP-compliant fire reserve integration, as the facility was scheduled for a Certificate of Fire Safety Inspection renewal within 90 days; and (4) installation without disrupting active operations in the wash floor.

The physical constraints were equally specific. The designated tank bay — located between the chemical storage room and the exit to the loading dock — measured 5.0 m × 4.0 m in floor area. The available clear height was 5.5 m. Access to the bay from the facility entrance required passing through the wash floor corridor, with a minimum clear width of 1.2 m. No overhead crane or forklift access was available within the bay.

Why 100,000 Liters

A 50,000-liter tank meets the minimum 24-hour backup requirement, but only at average daily consumption — not at peak load. Commercial laundry operations often run at 120 to 130% of average volume during month-end and holiday cycles when hotel linen turnover peaks. The 100,000-liter specification provides genuine two-day backup at average load, or a reliable single-day backup under surge conditions. The BFP fire reserve calculation for the facility required 35,000 liters allocated to the fire reserve manifold; this was partitioned within the 100,000-liter total volume, with a dedicated outlet and isolation valve — not a separate tank.

The TankSmith Solution

Site Survey and Foundation Design

TankSmith conducted a site survey on Day 1 of the engagement. The survey confirmed that the existing slab in the designated bay was a 150mm reinforced concrete industrial floor rated to 60 kPa — adequate for the filled tank load of approximately 10 kPa distributed over the 5 m × 4 m footprint. No structural reinforcement was required, eliminating a common source of project delay.

The foundation pad design specified a 200mm reinforced concrete pour over the existing slab, leveled to within ±3 mm across the full 5 m × 4 m surface. The pad was poured on Day 3 and cured for seven working days before panel assembly commenced. The curing period was used to pre-fabricate the piping package and deliver panels to the facility staging area.

Panel Assembly

The tank was assembled from WRAS-certified FRP/GRP panels in a 5.0 m × 4.0 m × 5.0 m configuration — a custom height made possible by the available 5.5 m ceiling clearance. Net capacity: 100 m³ (100,000 liters). Panels were transported from the staging area to the bay through the wash floor corridor individually; the 1.2 m corridor clearance was sufficient for the 1.0 m × 1.0 m panel format.

Assembly was performed over four working days using hand tools and the manufacturer's torque specifications for stainless steel hardware. EPDM gaskets were installed and inspected at every panel joint. A course-by-course sign-off checklist was used throughout, with no defects identified during assembly inspection.

Piping, Fire Reserve Partition, and Pump System

The piping package included: a 50mm inlet line with a float valve sized to the Maynilad supply flow rate; a 75mm domestic supply outlet with isolation valve and connection to the booster pump inlet; a dedicated 65mm fire reserve outlet with a normally-closed valve and connection to the fire pump manifold; a 100mm overflow routed to the facility drain; and a 50mm drain valve at the base frame. The fire reserve volume (35,000 liters, corresponding to 700 mm of tank depth from the base) was marked on the tank exterior and incorporated into the BFP documentation package.

A 1.5 kW pressure booster pump set was installed adjacent to the tank, sized for the facility's peak domestic demand of 200 liters per minute at 4 bar. The pump set included an expansion vessel, pressure switch, and electrical connection to the facility's distribution panel, performed by a licensed electrical contractor coordinated through TankSmith.

Commissioning and Results

The tank was filled on Day 16 of the project. A 24-hour hydrostatic test was conducted with visual inspection of all panel joints, base frame connections, and piping connections at 2-hour intervals. No weeping was observed at any joint. The booster pump was commissioned on Day 17 — flow and pressure tested at full load, verified against the design specification, and documented.

The commissioning documentation package — including as-built drawings, the hydrostatic test record, the WRAS panel certification, and the pump commissioning certificate — was delivered on Day 18, completing the project within the agreed timeline.

Key Project Details