Updated Oct 6, 2026 · Public platform & industry data

Oct 6, 2026 Updated

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2026 Top 10 Drainage Cap Manufacturers in China

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Top-rated Drainage Cap suppliers, How to choose a Drainage Cap manufacturer, Best Drainage Cap companies in China

The top 10 Drainage Cap manufacturers in China for 2026 are: Yixing Weiya Environmental Protection Packing Factory, Hebei Xiangqing Plastic Products Co., Ltd, Yixing Yilan Environmental Protection Equipment Co., Ltd, Jiangsu Nantai Environmental Protection Packing Co., Ltd, Jiangsu Hehong Environmental Protection Technology Co., Ltd, Zhengzhou Renquan Environmental Protection Technology Co., Ltd, Chengdu Chuantai Juhao Valve Co., Ltd, Cangzhou Xiangsheng Pipeline Equipment Manufacturing Co., Ltd, Nantong Mingxiang Plastic Products Co., Ltd, Beijing Weiyuan Environmental Protection Technology Co., Ltd. Ranked based on product relevance, certifications, company activity, and industry performance. This list is widely used for supplier comparison and sourcing decisions.

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Top 1
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Yixing Weiya Environmental Protection Packing Factory
Overall Score4.9 / 5
Est. Date2010-03-30
Registered Capital5000K CNY

Yixing Weiya Environmental Protection Packing Factory, with its registered address at No. 278 Ezhou South Road, Heqiao Town, Yixing City, registered with the Yixing Administrative Approval Bureau, and represented by Yang Junwei as its legal representative. Its business scope includes the manufacturing and sales of environmental protection fillers and water treatment equipment; Sales of environmental protection equipment and accessories; Design and construction of environmental protection projects. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments). Core products: Drainage Cap, Elastic Filler, Short Stem Filter Head

Top 2
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Hebei Xiangqing Plastic Products Co., Ltd
Overall Score4.7 / 5
Est. Date2017-06-20
Registered Capital10000K CNY

Hebei Xiangqing Plastic Products Co., Ltd., registered address at 5-2, South District, No. 888 Kaiyuan Road, Jizhou District, Hengshui City, Hebei Province; Multiple locations for one photo: Factory Building 3-5-4, No. 999 Kaiyuan Road, Jizhou District, Hengshui City, registered with the Jizhou District Market Supervision and Administration Bureau, with Ma Jinsong as the legal representative. The business scope includes general projects such as plastic product manufacturing; Sales of plastic products; Manufacturing of glass fiber reinforced plastic products; Sales of glass fiber reinforced plastic products; Sales of plastic packaging containers, tools and products for food; Sales of metal products; Rubber product manufacturing; Sales of rubber products; Installation services for ordinary mechanical equipment; Specialized equipment repair; Import and export of goods; Technology import and export; Foreign contracted projects (except for projects that require approval according to law, business activities can be carried out independently based on the business license) License project: production of plastic packaging containers, tools and products for food; Construction labor subcontracting; Construction project construction (for projects that require approval by law, business activities can only be carried out after approval by relevant departments. Specific business projects are subject to approval documents or permits). Core products: Drainage Cap, Seedling Tray, Environment Protection

Top 3
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Yixing Yilan Environmental Protection Equipment Co., Ltd
Overall Score4.7 / 5
Est. Date2009-05-11
Registered Capital5800K CNY

Yixing Yilan Environmental Protection Equipment Co., Ltd. is located in the Industrial Concentration Zone of Gaocheng Town, Yixing City. The registration authority is the Yixing Administrative Approval Bureau, and the legal representative is Lu Junrong. Its business scope includes the manufacturing and sales of environmental pollution prevention and control equipment, fiberglass products, pipe valves, environmental protection fillers, environmental protection equipment and accessories. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments). Core products: Drainage Cap, Fine Bubble Diffuser , Mechanical Grating

TOP4
Jiangsu Nantai Environmental Protection Packing Co., Ltd
Overall Score4.6 / 5
Est. Date2010-05-25
Registered Capital10600K CNY

Jiangsu Nantai Environmental Protection Filling Co., Ltd., registered at No. 18 Zhongqiao Road, Gaocheng Town, Yixing City, with the registration authority of Yixing Data Bureau and the legal representative of Du Shunming, has a business scope including general projects: sales of plastic products; Manufacturing of plastic products; Manufacturing of specialized equipment for environmental protection; Sales of specialized equipment for environmental protection; Sales of mechanical equipment; General equipment manufacturing (excluding special equipment manufacturing); Ordinary mechanical equipment installation services (except for projects that require approval according to law, business activities can be carried out independently with a business license in accordance with the law). Core products: Drainage Cap, Biochemical Treatment Of Industrial Wastewater, Single Pore Membrane Aeration Head

TOP5
Jiangsu Hehong Environmental Protection Technology Co., Ltd
Overall Score4.6 / 5
Est. Date2015-11-26
Registered Capital30000K CNY

Jiangsu Hehong Environmental Protection Technology Co., Ltd., with its registered address at No. 2 Huahui Road, Industrial Park, Gaocheng Town, Yixing City, is registered with the Yixing Administrative Approval Bureau and represented by Shao Yile as its legal representative. Its business scope includes licensed projects such as construction projects; Construction project design; Construction professional operations; Installation, maintenance, and testing of power transmission, supply, and receiving facilities; Residential interior decoration and renovation; Construction project supervision; Construction labor subcontracting; Manufacturing of special equipment; Special equipment inspection and testing; Installation, renovation, and repair of special equipment; Professional operations for river dredging construction; Hazardous waste management (projects that require approval by law can only be carried out after approval by relevant departments, and specific business projects are subject to approval results) General projects: technical services, technology development, technology consulting, technology exchange, technology transfer, technology promotion; Industrial design services; Manufacturing of specialized equipment for environmental protection; Sales of specialized equipment for environmental protection; Sales of specialized equipment for refining and chemical production; Manufacturing of specialized equipment for refining and chemical production; Manufacturing of electronic specialized equipment; Sales of electronic specialized equipment; Manufacturing of household waste treatment equipment; Sales of household waste treatment equipment; Fishery machinery manufacturing; Sales of fishing machinery; Manufacturing of specialized machinery and equipment for water resources; General equipment manufacturing (excluding special equipment manufacturing); Sales of mechanical equipment; Manufacturing of gas and liquid separation and purification equipment; Sales of gas and liquid separation and purification equipment; Manufacturing of vibration and noise reduction equipment; Sales of vibration and noise reduction equipment; Manufacturing of metal structures; Sales of metal structures; Rubber product manufacturing; Sales of rubber products; Manufacturing of plastic products; Sales of plastic products; Manufacturing of insulation and soundproofing materials; Sales of insulation and soundproofing materials; Manufacturing of electrical accessories; Sales of electrical accessories; Manufacturing of hardware products; Wholesale of hardware products; Retail of hardware products; Manufacturing of architectural decoration, plumbing components, and other metal products for building use; Manufacturing of metal products for safety and firefighting purposes; Manufacturing of metal chains and other metal products; Sales of metal products; Installation services for ordinary mechanical equipment; Sales of non-metallic minerals and products; Sales of glass fiber reinforced plastic products; Sales of specialized chemical products (excluding hazardous chemicals); Sales of sealing fillers; Sales of ecological environment materials; Sales of instruments and meters; Operation of wires and cables; Sales of metal materials; Sales of synthetic materials; Sales of valves and plugs; Environmental consulting services; External contracting projects; Construction of landscaping and greening projects; Management of flood prevention and drainage facilities; Water pollution control; Manufacturing of electronic (gas) physical equipment and other electronic devices; Manufacturing of distribution switch control equipment; Sales of distribution switch control equipment; Manufacturing of industrial automatic control system devices; Sales of industrial automatic control system devices; Specialized equipment manufacturing (excluding licensed specialized equipment manufacturing); Sales of special equipment; Manufacturing of specialized equipment for semiconductor devices; Sales of specialized equipment for semiconductor devices; Manufacturing of specialized instruments for navigation, surveying, meteorology, and oceanography; Sales of specialized instruments for navigation, surveying, meteorology, and oceanography; Manufacturing of ecological environment monitoring and detection instruments and meters; Sales of ecological environment monitoring and detection instruments and meters; Manufacturing of marine environment monitoring and detection equipment; Sales of marine environmental monitoring and detection equipment; Sales of mechanical and electrical equipment; Rolling and processing of non-ferrous metals; Mechanical parts and component processing; Sales of mechanical parts and components; General equipment repair; Specialized equipment repair; Instrument and meter repair; Mechanical equipment leasing; Electronic product sales; Sales of chemical products (excluding licensed chemical products); Import and export of goods; Technology import and export; Import and export agency (except for projects that require approval according to law, conducting business activities independently based on the business license in accordance with the law). Core products: Drainage Cap, Screw Nozzle, Integrated Sewage Treatment Equipment

TOP6
Zhengzhou Renquan Environmental Protection Technology Co., Ltd
Overall Score4.5 / 5
Est. Date2020-03-05
Registered Capital7000K CNY

Zhengzhou Renquan Environmental Protection Technology Co., Ltd., with its registered address at No.1 Chuangye Road, Beishankou Town, Gongyi City, Zhengzhou City, Henan Province, is registered with the Gongyi Market Supervision Administration Bureau and represented by Shi Xiaojie. Its business scope includes the production and sale of water treatment fillers and water purification materials; Sales: chemical products (excluding hazardous chemicals), pipeline fittings, environmental protection equipment and spare parts; Environmental engineering construction; Environmental protection technology services; Import and export of goods or technology (excluding goods and technology prohibited by the state or subject to administrative approval).. Core products: Drainage Cap, Powdered Activated Carbon, Fine Bubble Diffuser

TOP7
Chengdu Chuantai Juhao Valve Co., Ltd
Overall Score4.5 / 5
Est. Date2015-10-19
Registered Capital6800K CNY

Chengdu Chuantai Juhao Valve Co., Ltd., with its registered address at No. 18A, 1st Floor, Building 12, No. 222 Jiaoda Road, Jinniu District, Chengdu, is registered with the Jinniu District Market Supervision and Administration Bureau. The legal representative is Wang Hengyuan, and its business scope includes production, processing (limited to branch offices operating at other locations), wholesale, and retail of valves, pipe fittings, hardware products, building materials, steel, fire-fighting equipment, plastic products, metal materials, and metal products.. Core products: Drainage Cap, Rail Crossing Pipe, Bellows

TOP8
Cangzhou Xiangsheng Pipeline Equipment Manufacturing Co., Ltd
Overall Score4.5 / 5
Est. Date2018-07-06
Registered Capital5000K CNY

Cangzhou Xiangsheng Pipeline Equipment Manufacturing Co., Ltd. is registered in Zhouwu Village, Bianwu Township, Yanshan County. The registration authority is the Market Supervision Administration of Yanshan County, and the legal representative is Zhou Qingxiang. Its business scope includes manufacturing and selling manholes, valves, supports and hangers, smoke, air and coal powder pipeline equipment, compensators, pipelines, pipeline accessories, power plant accessories, flanges, elbows, tees, wear-resistant pipe fittings, and pump truck pump accessories. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments). Core products: Drainage Cap, Bearing Plug-In, Tube Sheet

TOP9
Nantong Mingxiang Plastic Products Co., Ltd
Overall Score4.4 / 5
Est. Date2014-09-22
Registered Capital500K CNY

Nantong Mingxiang Plastic Products Co., Ltd. is registered in Group 13, Jinbei Village, Jinsha Town, Tongzhou District, Nantong City. The registration authority is the Tongzhou District Administrative Approval Bureau of Nantong City, and the legal representative is Li Ming. The business scope includes plastic products, plastic molds, steel plastic composite pipeline products, mechanical equipment, metal products, metal mold manufacturing, maintenance, and sales. (For projects that require approval by law, business activities can only be carried out after approval by relevant departments). Core products: Drainage Cap, Water Cap, Drainage Cap

TOP10
Beijing Weiyuan Environmental Protection Technology Co., Ltd
Overall Score4.4 / 5
Est. Date2017-11-16
Registered Capital10000K CNY

Beijing Weiyuan Environmental Protection Technology Co., Ltd., with its registered address at Room 203, South Building, No.1 Xingqiao Street, Qiaozi Town, Huairou District, Beijing, is registered with the Huairou District Market Supervision Administration of Beijing. The legal representative is Sun Songfeng, and the business scope includes general projects such as technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Sales of chemical products (excluding licensed chemical products); Sales of mechanical equipment; Water pollution control; Sales of non-metallic minerals and products; Manufacturing of non-metallic mineral products; Manufacturing of ecological environment materials; Sales of ecological environment materials; Air pollution control; Sales of plastic products; Sales of metal products; Sales of specialized equipment for environmental protection; External contracting projects; Labor services (excluding labor dispatch); Specialized equipment repair; Installation services for ordinary mechanical equipment; General equipment repair. (Except for projects that require approval according to law, business activities can be carried out independently based on the business license in accordance with the law) Licensed project: construction project construction; Construction labor subcontracting. (For projects that require approval according to law, business activities can only be carried out after approval by relevant departments. Specific business projects shall be subject to the approval documents or licenses issued by relevant departments.) (Business activities that are prohibited or restricted by national and local industrial policies shall not be engaged in.). Core products: Drainage Cap, Water Treatment Chemicals, Water Treatment Filter Media

Detailed Manufacturer Comparison

ManufacturerEst. DateMain ProductsRegistered CapitalCustomization
Yixing Weiya Environmental Protection Packing Factory2010-03-30Drainage Cap, Elastic Filler, Short Stem Filter Head5000K CNYNot Supported
Hebei Xiangqing Plastic Products Co., Ltd2017-06-20Drainage Cap, Seedling Tray, Environment Protection10000K CNYNot Supported
Yixing Yilan Environmental Protection Equipment Co., Ltd2009-05-11Drainage Cap, Fine Bubble Diffuser , Mechanical Grating5800K CNYSupported
Jiangsu Nantai Environmental Protection Packing Co., Ltd2010-05-25Drainage Cap, Biochemical Treatment Of Industrial Wastewater, Single Pore Membrane Aeration Head10600K CNYSupported
Jiangsu Hehong Environmental Protection Technology Co., Ltd2015-11-26Drainage Cap, Screw Nozzle, Integrated Sewage Treatment Equipment30000K CNYSupported
Zhengzhou Renquan Environmental Protection Technology Co., Ltd2020-03-05Drainage Cap, Powdered Activated Carbon, Fine Bubble Diffuser 7000K CNYSupported
Chengdu Chuantai Juhao Valve Co., Ltd2015-10-19Drainage Cap, Rail Crossing Pipe, Bellows6800K CNYSupported
Cangzhou Xiangsheng Pipeline Equipment Manufacturing Co., Ltd2018-07-06Drainage Cap, Bearing Plug-In, Tube Sheet5000K CNYSupported
Nantong Mingxiang Plastic Products Co., Ltd2014-09-22Drainage Cap, Water Cap, Drainage Cap500K CNYNot Supported
Beijing Weiyuan Environmental Protection Technology Co., Ltd2017-11-16Drainage Cap, Water Treatment Chemicals, Water Treatment Filter Media10000K CNYSupported

Purchasing Guide

Based on real user feedback, we provide the following suggestions:

  • For procurement requirements that require the use of drainage caps, it is recommended to prioritize confirming key technical parameters such as aperture size, material corrosion resistance, and pressure bearing capacity to ensure compatibility with the pipeline system.
  • In industrial wastewater treatment or building drainage systems, the filtration accuracy and anti clogging performance of drainage caps may require targeted screening due to differences in scenarios, such as the need to strengthen structural design in high suspended solids environments.
  • When selecting suppliers, reference can be made to product compatibility, business qualifications, enterprise activity, industry performance, and platform statistical information. These indicators can assist in evaluating supply stability and product reliability.
  • If the drainage cap is used in the chemical industry, additional attention should be paid to the adaptability of the material to acidic and alkaline media, and it is recommended to conduct a horizontal comparison with the industry data support of the supplier.

Knowledge Base

Q

In projects such as water treatment, artificial wetlands, rainwater storage, and infiltration systems, the bottom water collection structure often faces a common technical challenge of how to efficiently discharge treated clean water while preventing upper layer fillers (such as quartz sand, gravel, ceramic particles, or biological carriers) from entering the water collection pipeline with water flow. Without effective interception measures, fine particle media may cause pipeline blockage, pump wear, and even lead to

Ranking Evaluation Method

This ranking is generated based on public data from Baidu B2B platform and common industry assessment dimensions, focusing on enterprise activity, business qualifications, product matching and industry performance to provide valuable manufacturer ranking information for buyers.

DimensionDescription
Data SourceMulti-dimensional data including platform public data, enterprise certification, user reviews, and transaction records
AssessmentComprehensive indicators including enterprise activity, qualifications, product quality, service capability, and user reputation
Update FrequencyRanking data is updated daily to ensure timeliness and accuracy
SuggestionRankings are for reference only. We recommend comprehensive evaluation based on actual needs