-- No items so far --
The S-Series Onground strips the pool back to what matters: engineered steel, exposed by design. No architectural panels. No cladding. No pretense. Just the same aerospace-grade tubular steel platform that underpins every S-Series pool—set onground, finished in galvanized steel, and ready to hold water the day it arrives. It's the most direct expression of what an Ecopool is.
The Architectural Edition wraps itself in aluminum composite. The Canvas invites stone and stucco. The Onground does neither. Its exterior is the structure itself — steel that weathers gracefully, resists corrosion, and needs nothing applied over it. What you see is exactly what holds your water: 80-ksi tubular steel, precision-welded and insulated, standing in your backyard with nothing to hide.
Where other pools need an exterior layer to look complete, the Onground arrives finished. The galvanized steel surface carries an industrial clarity that pairs naturally with concrete patios, gravel yards, timber decking, and modern landscapes. It doesn't compete with your architecture—it complements it by refusing to imitate it.
The Onground is engineered to sit directly on a prepared pad—compacted gravel, a concrete slab, or a reinforced deck. No excavation required. No rebar, no gunite, no forming. The pool arrives fully assembled or in bolt-together modules, sets down on level ground, connects to plumbing and electrical, and holds water the same day.
For sites where excavation is impractical, prohibited, or simply unnecessary, the Onground eliminates the single biggest cost and delay in traditional pool construction.
Stronger Than 6" Gunite Pools
Faster Installation Than Traditional Pools
Cheaper to Maintain Than Gunite Pools
The Onground's exterior is dual hot-dip-galvanized steel—the same coating that protects highway bridges and transmission towers for decades without repainting. The zinc layer bonds metallurgically to the base steel, forming a barrier that self-heals minor scratches and resists corrosion in salt air, chlorinated spray, and Texas heat alike.
No powder coat to chip. No composite panel to delaminate. No render to crack. The finish is the structure, and the structure is built to outlast everything around it.
The S-Series Onground delivers the full S-Series platform—aerospace-grade steel, insulated core, intelligent water management—in its most direct form. No excavation, no exterior finish to maintain, and installation measured in hours, not months.
The Onground uses the same structural platform trusted across the entire S-Series line: a lattice of 80-ksi tubular steel, precision-welded into a rigid space frame that carries the full hydrostatic load without external reinforcement. Wall deflection under full water pressure measures less than 1/16 inch across 20 feet—six times stiffer than 8-inch gunite.
Dual hot-dip-galvanized skins encase a closed-cell polyurethane core rated at R-10, creating a thermally sealed envelope that holds heat overnight and sheds excess warmth on summer afternoons. The difference is simple: on the Onground, those galvanized skins are the exterior you see and touch.
A commercial-grade UV-C reactor neutralizes 99 percent of pathogens in a single pass, while a precision peristaltic pump delivers micro-pulses of sodium hypochlorite—keeping free chlorine at roughly 0.5 ppm, no different from what flows through your kitchen tap.
No salt cells to scale, no stabilizer tablets to dissolve, no chemical odor drifting across the patio. Cyanuric acid and chloride stay well below the thresholds that corrode metal—keeping the exposed steel exterior in the same condition as the day it arrived.
The Onground excels on sites where digging isn't practical or permitted—rocky terrain, high water tables, elevated decks, sloped lots, or properties with strict excavation restrictions. Prepare a level pad of compacted gravel or pour a simple concrete slab. Set the pool. Connect plumbing and electrical. Fill with water.
Single-module pools hold water the same day they're placed. Multi-module layouts typically assemble in under two days—no crane, no rebar, no weather delays. The timeline from delivery to first swim is measured in hours.
The Onground frame consumes 85 percent less raw material than a gunite shell of equal volume, yet carries greater load. R-10 insulated panels slash heat loss by up to 80 percent, micro-dosing chemistry trims chemical consumption by roughly 40 percent, and every steel tube, insulation board, and membrane sheet is fully recyclable when the time comes. Without excavation, there's no displaced earth to haul, no backfill to compact, and no landscape to rebuild.
Every Onground module is fabricated in a climate-controlled facility where CNC plasma tables cut each tube and hot-air welders seal every seam under repeatable conditions. Insulation is bonded, galvanized skins are fitted, and the interior membrane is heat-welded before the pool ever meets your property.
Dimensional lasers confirm squareness and alignment prior to shipping. The pool arrives ready to set, connect, and fill—no field welding, no on-site fabrication, no guesswork.
The Onground inherits every efficiency built into the S-Series platform: continuous R-10 insulation that retains heat through cool Texas nights, variable-speed pumps that sip electricity, and optional solar integration that offsets the remaining draw across the year. Salt chlorinators, stabilizer tablets, fossil-fuel heaters, and fixed-speed pumps are excluded by design—replaced by smarter, quieter alternatives that keep operating costs near zero.
The exterior is exposed galvanized steel—but step inside and you're standing on Ecopool's Architectural 3D Membrane. A textured, non-porous surface inspired by natural sandbars and layered stone, made from Zycore™, a German-engineered polymer composite that outperforms plaster, fiberglass, and tile in algae resistance, UV stability, and long-term colour retention. The contrast is deliberate: raw industrial honesty on the outside, refined material science within.
Step inside an Onground pool and your feet meet a surface shaped by German embossing technology—contours modelled on water-worn rock and layered sandstone pressed into a reinforced polymer sheet. The texture provides confident grip without the roughness of exposed aggregate, and smooth glide without the slipperiness of gel coat.
The membrane is non-porous, chemically inert, and maintenance-friendly: robotic cleaners track straight lines without snagging, algae finds no foothold, and the colour you select on day one stays true for decades.
Zycore™ is the commercial-grade composite that gives the Onground its interior resilience. Flexible polymer layers fuse with a high-strength polyester matrix to deliver roughly 3,200 psi of tensile strength—four times what traditional renders achieve. Co-extruded UV stabilizers lock in colour and structural integrity decade after decade, even under direct Texas sun.
No chalking like plaster. No crazing like fiberglass. No grout lines to scrub like tile. The inert, seamless surface stabilizes water chemistry from the inside out—pairing industrial steel on the outside with refined material science within.
The S-Series Onground exists for owners who value directness. No excavation to schedule. No exterior finish to select, install, or maintain. No months of construction turning a backyard into a worksite. The pool arrives from the factory, sets on a prepared pad, connects, fills, and swims.
Underneath that galvanized steel skin sits the same platform trusted across the entire S-Series line: insulated panels, precision-welded frames, and a Zycore™ interior that outlasts concrete, fiberglass, and tile. Smart water management keeps chemistry balanced with minimal intervention, while R-10 insulation and variable-speed equipment keep energy costs near zero.
From lakeside retreats to flat suburban lots, from modern industrial homes to Hill Country ranches—the Onground delivers the full S-Series experience without breaking ground.
Every S-Series pool shares the same aerospace-grade tubular steel architecture, insulated core, and intelligent water management. Choose the installation style that fits your vision.
Fully buried for a clean, traditional pool aesthetic. Flush with your patio and landscape — perfect for luxury backyards.
Learn More
Above-ground with sculptural aluminum composite panels and a minimalist silhouette. A bold architectural statement.
Learn More
Wrap the exterior in stone, stucco, brick, or any material. A cladding-ready structure that blends into your home.
Learn More
