GEPS est-il un système de drainage vertical ?

Non. GEPS n’est pas un drainage. Les tubes n’acheminent pas l’eau; ils aèrent le sol pour recréer une structure poreuse qui répartit et fait circuler l’eau naturellement.

Pourquoi GEPS peut sembler plus coûteux à l’installation ?

À périmètre équivalent, GEPS remplace drainage + arrosage automatique + terrassement/maintenance. Le coût total de possession est souvent inférieur, avec une durée de vie supérieure.

Dans quelles zones intervenez-vous ?

France, Suisse, Maroc et Europe. La demande d’offre en ligne permet une évaluation rapide : https://www.dpz-drilling.com/demander-offre

Quels bénéfices concrets apporte GEPS ?

Disparition plus rapide des flaques, sols stabilisés, protection des bâtis, remontée d’humidité utile l’été. Sans pompe, énergie ni entretien; pose rapide et invisible.

High-performance fields

High-performance fields start underground

start underground

All-in-one rainwater absorption, turf hydration, and soil regeneration. No pumps. No heavy works. Powered by Exlterra GEPS®.

How it works

Performance fields

Because the real game is played underground

Close-up of a white line marking on the ground of a sports field | Sam Gash

View of a baseball stadium, its field and stands at sunset | Sam Gash

High-performance fields fail for one reason: water mismanagement. Too much water suffocates roots; too little stresses turf. GEPS® restores natural soil balance instead of fighting symptoms.

This is why GEPS® installations by Sam Gash change the game.

This system works without pumps, energy, or ongoing maintenance. It integrates with existing drainage and irrigation infrastructure. Once installed, the ground regulates itself. Permanently.

Rainwater absorbed 10 times faster*

Firm and usable fields all year round*

Watering needs reduced by 50% or more*

Zero maintenance, zero energy consumption

Cross-section of Exlterra GEPS® technology | Sam Gash

The only underground system that does three jobs at once. And never needs maintenance.

The number 20 marked on the grass of a sports field | Sam Gash

How it works

FAQ

What users say

Groundwater recharge

The GEPS technology might best be described as novel and is unique in my over 40 years of experience in water resource management, including wetland design and operation. It cannot be readily compared with existing surface drainage methods that depend on pipes or channels to deliver water to holding basins. The GEPS is passive but has great capacity for water movement, taking advantage of many mechanisms and processes.

Dr. Edwin Herricks

Professor Emeritus of Environmental Biology in the Environmental Engineering and Science Program at the University of Illinois, Urbana, Illinois, USA

Low impact development (LID)

Most of the GEPS within the infiltration basin enhanced the local infiltration rate. The infiltration rates associated with two of the shallow GEPS were 7.4 – 8.6 times faster than the one associated with native soil conditions. The infiltration rate associated with the deep GEPS was 10.2 times faster than that associated with native soil conditions.

Dr. Peggy Mauk

PhD and Distinguished Senior Research Specialist at the Institute of Water Research, Michigan State University, Lansing, Michigan, USA

Water conservation and irrigation

GEPS reduced water stress on turf grass during dry spells, preserving vegetation and soil health effortlessly.

Thomas Olivier

Greenskeeper, Rougemont-le-Château Golf Course, France

Low impact development (LID)

GEPS turned a previously unplayable fairway into a reliable area for sports, quickly draining stormwater and maintaining soil integrity.

Thomas Olivier

Greenskeeper, Rougemont-le-Château Golf Course, France

Damp basements and hydrostatic pressure

After more than six years of use, the system works perfectly. We have had no further humidity issues despite heavy rainfall, with a solution that is simple, non-invasive, and fully reliable over time.

M.S.

Chavannes-des-Bois, Switzerland

Waterlogged gardens and green spaces

GEPS provides a permanent, invisible balance of soil moisture. The ground remains playable in wet periods, retains sufficient moisture in dry periods, and requires no maintenance. Turf quality, root depth, and overall playability have significantly improved.

Norbert Daverat

Greenskeeper, Golf & Country Club Basel, Switzerland

Low impact development (LID)

GEPS effectively eliminated standing water issues in our parks. Even after heavy rainfall, water no longer lingers, and the soil remains firm and usable.

James Breuckman

City Manager, City of Pleasant Ridge, USA

Groundwater recharge

GEPS supports natural groundwater recharge by efficiently managing stormwater, ensuring sustainable water cycles on our golf course.

Aurélie Morandin

Greenskeeper, Aa Saint-Omer Golf Club, France

Slopes and embankments prone to erosion

GEPS ensured stability on slopes and uneven terrains, improving playability and reducing maintenance efforts year-round.

Aurélie Morandin

Greenskeeper, Aa Saint-Omer Golf Club, France

Low impact development (LID)

We had heavy rain before a gymnastics festival. Although the GEPS installed area was the site of the bleachers, the ground was totally dry. We also noticed a strong effect after typhoon #19 passed through the Kanto region: the ground would have been oversaturated, but it was not.

Hideaki Taira

Principal, Azabu High School, Tokyo, Japan

Slopes and embankments prone to erosion

The soil in our parks is firmer and healthier thanks to GEPS, supporting both sports and vegetation growth.

James Breuckman

City Manager, City of Pleasant Ridge, USA

Damp basements and hydrostatic pressure

The GEPS system eliminated the root cause of moisture in the walls, resulting in completely dry basement rooms, without disruptive works or impact on the building’s operation.

Municipality of Tczew

City of Tczew, Poland

Waterlogged gardens and green spaces

Since GEPS was installed, the fairway no longer has stagnant water issues. No drainage system ever allowed such a result. And the soil now always has a good moisture level, even in dry periods.

Guillaume Sajus

Greenskeeper, Domaine Imperial Golf Club, Switzerland

Groundwater recharge

Since installing GEPS, our soil remains balanced even after heavy rains, proving its capability to sustain groundwater levels effectively.

Guillaume Sajus

Greenskeeper, Domaine Imperial Golf Club, Switzerland

Water conservation and irrigation

With GEPS, our parks resist heat and drought better, reducing water needs while improving grass quality.

James Breuckman

City Manager, City of Pleasant Ridge, USA

Low impact development (LID)

GEPS exceeded our expectations by improving drainage and ground firmness, even during extreme weather conditions. It’s an eco-sustainable solution that works year-round.

Aurélie Morandin

Greenskeeper, Aa Saint-Omer Golf Club, France

Water conservation and irrigation

Even during severe droughts, GEPS maintained adequate soil moisture, ensuring our fairways stayed green without additional watering.

Aurélie Morandin

Greenskeeper, Aa Saint-Omer Golf Club, France

Damp basements and hydrostatic pressure

The results are particularly impressive: the basement is now completely dry year-round, the air is healthier, and nearly ten years later the system continues to perform flawlessly without any maintenance.

H.A.Z.

Chêne-Bougeries, Switzerland

Low impact development (LID)

After installing GEPS, water from heavy storms infiltrates rapidly, making our bunkers and fairways ready for play within hours.

Aurélie Morandin

Greenskeeper, Aa Saint-Omer Golf Club, France

Groundwater recharge

GEPS replenishes the soil naturally, reducing dependency on artificial irrigation and safeguarding the course’s future.

Thomas Olivier

Greenskeeper, Rougemont-le-Château Golf Course, France

Slopes and embankments prone to erosion

GEPS stabilized wet areas on our fairways, significantly enhancing firmness and reducing ground deformation.

Thomas Olivier

Greenskeeper, Rougemont-le-Château Golf Course, France

Low impact development (LID)

Exlterra's GEPS transformed our waterlogged parks into vibrant, usable spaces. The system resolved standing water issues and reduced mosquito presence, making areas suitable for recreational activities.

James Breuckman

City Manager, City of Pleasant Ridge, USA

Low impact development (LID)

Since installation, the ground has remained firm and free of standing water year-round, transforming previously unusable areas into reliable, maintenance-free public spaces.

Carrie A. Laird

City of Birmingham, USA

Muddy paths and roads

GEPS effectively eliminated standing water and has consistently met our expectations. It improved site safety, maintained stable ground conditions year-round, and delivered a direct positive impact on airport operations.

Jason Watt

Coleman A. Young Airport, Detroit, USA

Golf courses

Greens, fairways, tees and bunkers demand precision. GEPS® stabilizes soil moisture, improves root depth, and reduces surface stress for consistent playability, fewer closures, and healthier turf year-round.

Learn more

A footballer's feet while dribbling | Sam Gash

Football & soccer fields

Football and soccer destroy weak soil long before it destroys grass. GEPS® reinforces the ground structure and keeps moisture where roots need it. Stronger turf. Faster recovery. Fewer failures during the season.

Learn more

Spectators in the stands of a stadium watching a match | Sam Gash

Baseball glove with baseball field in the background | Sam Gash

Baseball fields

Baseball fields rely on consistency across infield, outfield, and base paths. GEPS® stabilizes the soil profile, improves vertical drainage, and preserves oxygen in the root zone. The surface is firmer, more uniform; it recovers faster after rain, and needs fewer maintenance.

Learn more

Athlete ready to start a race | Sam Gash

View of a sports complex from the stands | Sam Gash

Sports complexes

Multiple fields mean multiplied maintenance risk and cost. The GEPS® technology standardizes underground performance across all surfaces. Less intervention, predictable conditions, long-term operational control.

Learn more

Lacrosse player looking at the playing field | Sam Gash

Lacrosse fields

Lacrosse fields demand fast drainage and stable footing during high-speed play. GEPS® stabilizes the soil profile, improves vertical drainage, and preserves oxygen in the root zone. The surface stays firmer; it dries faster after rain and remains playable through intensive spring seasons.

Learn more

Jockey jumping an obstacle with his horse during an equestrian competition | Sam Gash

Equestrian arenas

Equestrian arenas depend on stable footing that dries quickly and stays consistent under impact. GEPS® stabilizes the soil structure, improves drainage, and balances moisture. The surface is firmer, dries faster after rain, and stays safer and more reliable for training and competition.

Learn more

Built for elite surfaces. Proven across disciplines.

White line on a footbal field turf | Sam Gash

Meet Sam Gash

Built in elite performance environments. Driven by work ethic, discipline, and precision. From professional football to high-performance fields, the standards never changed.

Learn more

Problems we solve

GEPS® is also used in playgrounds, parks, landscaped areas, and infrastructure zones where standing water, compaction, or unstable soil limit usability. The mechanism remains the same. The surface changes.

Greenkeeper watering a golf course | Sam Gash

Water conservation and irrigation

Reduce your watering needs while maintaining soil health.

Free estimate

Low impact development (LID)

Sustainable strategy for water infiltration, reducing heat and strain on drainage networks.

Free estimate

Floodable sports fields and golf courses

Make your grounds firm and playable quickly after rain.

Free estimate

House cracked by clay shrinkage and swelling | Sam Gash

Clay heave

Limit cracking and subsidence by eliminating the shrinkage and swelling of clay soils.

Free estimate

Damp basements and hydrostatic pressure

Solve foundation moisture problems without drains or pumps.

Free estimate

Waterlogged gardens and green spaces

Restore healthy soil without visible drains.

Free estimate

Groundwater recharge

Store water in the soil, naturally and sustainably.

Free estimate

Flooded parking lots and plazas

Eliminate puddles without overloaded storm drains.

Free estimate

Slopes and embankments prone to erosion

Stabilize your soils by reducing saturation and runoff.

Free estimate

Muddy paths and roads

Ensure the load-bearing capacity of your driveways without heavy drainage.

Free estimate

A quick and invisible installation, without trenches or bedding.

Free online estimate
(48 hours)

Technical validation and layout plan

Clean installation by core drilling

On-site monitoring after activation

Nouvelle technologie GEPS

Voir la vidéo

Pluies absorbées dix fois plus vite*

Sols stabilisés en profondeur*

Besoins en arrosage divisés par deux*

*Performances maximales constatées sur les installations GEPS contrôlées. Les résultats peuvent varier selon les contextes technique et naturel.

Tailored financial solutions

We offer tailored financing solutions with our partners. The return on investment is achieved simply by saving on maintenance costs and reducing downtime for play and watering.

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High-performance fields

High-performance fields start underground

start underground

All-in-one rainwater absorption, turf hydration, and soil regeneration. No pumps. No heavy works. Powered by Exlterra GEPS®.

Because the real game is played underground

This is why GEPS® installations by Sam Gash change the game.

The only underground system that does three jobs at once. And never needs maintenance.