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Rainwater Resource · Sponge City Solutions
National high-tech enterprise · Since 2013

Keep every drop of rain
for the next generation

End-to-end sponge-city rainwater systems

In-house rainwater control and utilisation technology: harvesting, storage and reuse solutions engineered for sponge-city and eco-city projects across China & Southeast Asia.

  • PP modular storage tanks
  • Smart first-flush diverters
  • Packaged plant rooms
  • PLC smart control systems
Sponge city rainwater project78+Projects delivered
0Founded
0Projects delivered
0Max module load
050-year creep validated
Products

Product CenterRainwater harvesting & reuse systems

Installed at the inlet of the harvesting line. A rain sensor watches the rainfall signal: the dirty first flush is discharged to the municipal drain, then the device automatically switches to collect clean rainwater — screening, first-flush diversion and flow splitting in one unit.
HDPE shell, stainless support frame, dedicated filter bag and level sensor. Works on hydraulic principle with no electricity; direct burial, corrosion- and ageing-resistant, flexible sealed connection to plastic pipework.
Horizontal HDPE vessel optionally fitted with biological media, automatic cleaning and multi-media filters, UV steriliser, dosing and pressure tank, with manhole cover. No power inside the chamber, so no damp or flooding damage; buries without spoiling the landscape.
Combines system control with filtration and disinfection (self-cleaning filter plus UV). Variable-frequency control of reuse pumps, automatic or manual pump/valve operation, auto backwash, and adjustable filtration precision by changing mesh.
Outdoor fluorocarbon cabinet with toughened-glass window, holding PLC, inverter, HMI, electrical components, pressure tank and sensors. Full automation, smart control, self-diagnosis and alarms; configurable per application.
Same outdoor cabinet family without the control system, for automatic self-cleaning filters, UV sterilisers and pressure tanks. Custom sizes, powder-coated cold-rolled steel or stainless steel.
How it works

From survey to hand-overEnd-to-end delivery, proven on 78+ projects

Site survey & catchment

Catchment

Design & module selection

Design

Excavation & base slab

Excavation

Geomembrane welding

Geomembrane

Module assembly & backfill

Assembly

Skim wells & pipework

Pipework

Equipment commissioning

Commissioning

Inspection & hand-over

Hand-over

Projects

Project CasesSponge city projects since 2013

Rooftop rainwater is diverted of first flush then stored for dust suppression on sports fields and WC flushing.

Nanhai District, Foshan City

Campus retrofit combines a rain garden with a modular tank, serving both teaching demonstration and daily irrigation.

Yantian District, Shenzhen City

Food and beverage plants are water intensive; harvested rain supplements cooling systems and housekeeping, easing municipal supply load.

Nanhai District, Foshan City

Plaza runoff passes screening and first-flush diversion before entering underground storage, later reused for landscape and irrigation.

Zhuhai City, Guangdong Province

The research campus pairs passive buried filtration with modular storage, reducing mechanical equipment and O&M cost.

Zhongshan City, Guangdong Province

Rooftop and road runoff collected centrally; storage volume meets the local annual runoff control rate while cutting peak flow.

Wuqing District, Tianjin
Insights

News & InsightsNews & industry insights

Guangdong Xihai rainwater_Sponge city rainwater control and utilization_Source factory

In the current era of rapid development in sponge city construction and rainwater resource utilization, choosing a source factory with reliable technology, stable production capacity, complete qualifications, and comprehensive services is crucial for partners to reduce costs, enhance project competitiveness, and ensure delivery and acceptance. Guangdong Xihai Rainwater Environmental Technology Co., Ltd. (Xihai Rainwater) specializes in research, production, and sales of sponge city rainwater control and utilization technology. With its full-chain capabilities and open cooperation model, it has become a long-term preferred partner for engineering companies, design institutes, building material suppliers, and municipal units across the country.

1. Core advantages of choosing Xihai Rainwater Cooperation

1. Self-developed technology iteration, adapting to high-standard requirements across multiple scenarios

The company has been deeply engaged in rainwater control and utilization technology for many years, continuously investing in research and development, and has formed an integrated technical system for rainwater collection, regulation, purification, reuse, and intelligent control. Our core products, including PP rainwater collection modules, silica sand rainwater collection systems, and rainwater regulation and storage devices, feature high pressure resistance, high water storage capacity, corrosion resistance, and easy installation, meeting the needs of various scenarios such as municipal roads, residential areas, industrial parks, urban parks, and commercial complexes. We can provide customized scheme design, technical disclosure, on-site guidance, and assist partners in quickly implementing complex projects, enhancing the competitiveness of the scheme and the success rate of bidding.

2. Full-process service support, ensuring a worry-free cooperation throughout

From early-stage technical consultation, scheme optimization, and quotation calculation, to mid-stage production and supply, on-site installation guidance, and then to the later-stage project data inspection and acceptance support, Xihai Rainwater provides one-stop full-process services. The team possesses rich practical experience in projects and can assist partners in solving issues such as design docking, construction coordination, and acceptance compliance, reducing project risks, improving delivery efficiency, and truly achieving cooperation, satisfaction, and long-term win-win.

3. Regional protection and policy support, prioritizing the interests of partners

We implement a strict regional cooperation protection mechanism to ensure market space for our partners. At the same time, we provide supporting empowerment such as brand promotion, technical training, and project case support to help our partners rapidly expand their markets and enhance their professional capabilities. With the goal of long-term stable cooperation, we share the dividends of sponge city industry development with our partners.

II. Company Introduction: Specializing in rainwater environmental technology, we strive to become a comprehensive service provider for the entire sponge city industry chain

Guangdong Xihai Rainwater Environmental Technology Co., Ltd., established in 2013 and headquartered in Guangzhou, Guangdong, is a national high-tech enterprise specializing in the research and development of sponge city rainwater control and utilization technology, equipment production, sales services, and system solution output. The company focuses on rainwater collection, rainwater regulation and storage, stormwater management, and water resource reuse. After years of innovative development, it has built a full industrial chain capability from technology research to product manufacturing, scheme design, engineering services, and acceptance delivery. Its business covers multiple provinces and cities across the country, serving various projects in municipal administration, real estate, industry, and gardening.

Relying on independent research and development and strict quality control, the company continuously improves product performance and system stability. It is committed to providing reliable technical and product support for urban flood control, water conservation and emission reduction, and ecological restoration, striving to become a trustworthy brand in the domestic rainwater environmental technology field.

III. Core product system: covering the entire scenario of rainwater control and utilization

1. PP rainwater collection module

Made of high-quality, environmentally friendly polypropylene material, it features high pressure resistance, high porosity, and quick assembly. It is suitable for underground rainwater collection tanks and widely used in rainwater recycling and water storage scenarios in residential areas, municipalities, parks, etc. It is easy to install, requires little space, and has a long lifespan.

2. Complete set of equipment for rainwater collection system

It includes a rainwater discard device, a filtration device, a water storage module, a purification equipment, a reuse control system, etc., achieving the integration of rainwater collection, purification, storage, and reuse. The treated rainwater can be used for greening irrigation, road spraying, landscape water replenishment, fire fighting, etc.

3. Rainwater regulation and storage system

For urban stormwater management design, it aims to effectively reduce peak flow, regulate runoff, lower the risk of waterlogging, and meet the needs of municipal pipe network regulation and storage, park stormwater management and control, and sponge city construction standards.

IV. Corporate Qualifications and Strength: Compliant and Reliable, Worthy of Long-term Cooperation

National high-tech enterprise

More than 30 national patented technologies (utility models and invention patents)

Certified by ISO9001 Quality Management System, ISO14001 Environmental Management System, and ISO45001 Occupational Health and Safety Management System

Possess relevant qualifications for construction labor services in construction enterprises

The product has been tested by an authoritative organization and meets the relevant standards for sponge city construction

Full-process quality control management, traceability to the source factory, and complete project acceptance documentation

V. Join Hands with Xihai Rainwater to Build a New Future of Sponge City

Guangdong Xihai Rainwater Environmental Technology Co., Ltd., rooted in technology, quality-oriented, and committed to win-win cooperation, continuously provides cost-effective products, professional technical support, and full-process services to our partners. Whether you are a general contractor, building materials distributor, design consultant, or municipal construction unit, we are willing to collaborate with you in an open manner, with stable production capacity and reliable quality, to jointly create more high-quality rainwater utilization projects and contribute to making cities more ecological, safer, and water-saving.

We welcome cooperative partners from all over the country to visit our factory, negotiate cooperation, and jointly seek development and create value!

Hainan rainwater harvesting system _ professional solution _ Xihai Rainwater _ supporting the green development of tropical islands

In the context of the construction of Hainan Free Trade Port and the promotion of the Ecological Civilization Pilot Zone, the scientific utilization of rainwater resources becomes particularly crucial. Guangxi Xihai Rainwater Environment Technology Co., Ltd., leveraging its in-depth understanding of the tropical island climate characteristics, provides professional rainwater collection system solutions for the Hainan region. As a source factory with independent production capabilities, our series of products developed for the special environment of Hainan have achieved remarkable results in practical applications.

Specially designed to cope with tropical climate characteristics

The unique environment of high temperature, high humidity, and high salt spray in Hainan region poses higher demands on rainwater collection systems. The modular water storage system we have adopted undergoes special anti-corrosion treatment, and its protective layer has passed a salt spray resistance test lasting over 2000 hours, ensuring long-term stable operation in a marine climate. The system has undergone rigorous structural safety verification, effectively resisting the impact of severe typhoon weather. Additionally, it is equipped with an intelligent monitoring system to grasp the real-time operating status of the equipment.

Verified by multiple successful project practices

Multiple projects we have implemented in the Hainan region have achieved excellent results. In a coastal area project, the rainwater collection system has achieved comprehensive coverage of regional green irrigation, significantly saving annual water costs. In the field of municipal infrastructure, the system collects a considerable amount of rainwater annually, effectively alleviating urban drainage pressure. These practical cases fully demonstrate the reliability and practicality of the system under tropical conditions.

Comprehensive local service support

To ensure the continuous and stable operation of the system, we have established a comprehensive technical service network in Hainan. Our localized team can provide timely technical support and maintenance services, and the equipped professional monitoring platform enables real-time tracking of the system's operational status. Furthermore, we have established an emergency response mechanism to ensure the safe operation of the system under special weather conditions.

Continuously innovate and optimize solutions

We have always been attentive to the new demands for rainwater management in Hainan region, continuously upgrading our technology and optimizing our solutions. By constantly summarizing project experience and refining system design, we strive to provide more precise and efficient solutions for our Hainan customers. Our professional team will offer personalized technical consultation and system design services based on the specific characteristics of each project.

Xihai Rainwater is committed to providing technical support for the sustainable development of Hainan through professional and reliable rainwater collection systems. We will continue to leverage the technological advantages of our source factory to contribute to the construction of Hainan Free Trade Port and the development of ecological civilization.

Guangdong Xihai Rainwater Environment Technology has focused on rainwater control and utilisation since 2013, earning national high-tech enterprise status. Products serve residential estates, parks, industrial and agricultural facilities and islands.

Tropical climates deliver intense concentrated rain. Re-check catchment area and storage volume against local rainfall formulas, then set first-flush and filtration grades. Prioritise reuse for cooling tower make-up, irrigation and road washing to cut mains water use.

Ready to keep every drop of rain?

Free feasibility study and containerised export for projects in Vietnam, Malaysia, Singapore, Thailand, Indonesia and the Philippines.

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