Hot Water Tank - All Water Heater Components You Need
- Inner water tank & assembled water tank available.
- Customizable capacity from 6.6L to 2000L.
- Built with premium materials for long service life.
- Optional materials (glass-lined / stainless steel).
- 300,000-cycles fatigue pulse tested.
- 860℃ high-temperature sintering process.
Leading Hot Water Tank Manufacturer
Haoha is a professional hot water tank manufacturer specializing in inner water tanks and storage water tanks for hot water heaters. We manufacture hot water tanks using premium-quality raw materials and manage the entire production process, from raw materials processing to final assembly. Whether you already have detailed specifications or only an application idea, we provide full OEM/ODM hot water tank solutions, including material selection, capacity design, and structure optimization, to help you develop the most suitable water heater tank for your target market.
With over 20 years of manufacturing experience in hot water tanks and water heater components, we have manufactured over 10 million units from Haoha factories. Today, we proudly serve residential, commercial, and industrial water heater brands, delivering reliable, long-lifespan hot water tank solutions to global markets.
Hot Water Tanks We Provide
If you need to assemble your water heater in your country, but still need water tanks or inner water tanks. Haoha offers flexible solutions designed for different market and application.
Utilizing the imported premium-quality enamel raw materials and advanced high-temperature sintering technology to glass-lined water tanks with our strict quality control.
Manufactured from high-grade stainless steel, our water tanks ensure long-lasting durability and corrosion resistance.
Various diameters available with a maximum of DN80, suitable for large capacity heating systems. Capacity Customizable.
Compatible with solar, gas, electric and heat pump water heaters. 150L – 500L customizable. Flexible installation and multiple application scenarios.
Raw Materials & Steel Processing for Hot Water Tanks
To ensure long-term durability and consistent quality, Haoha operates its own steel processing facilities for internal production. During our steel manufacturing, we have strict quality control to ensure the hot water tanks have the highest durability and performance standards that we can achieve. Whether your hot water tank is assembled by you or by Haoha, our controlled raw materials and advanced processing guarantee consistent, reliable, and long-lasting water heater components.


Automated Inner Water Tank Manufacture
By utilizing fully automatic CNC welding and high-temperature sintering systems, Haoha achieves stable, high-volume production of hot water tanks while maintaining consistent quality. With multiple automated manufacturing lines, we are able to output thousands of hot water tanks per day, ensuring reliable delivery and uniform performance for global customers. Since the inner water tank directly determines the service life of a water heater, we apply strict manufacturing controls and inspections at every stage of inner tank production.
Fully Customization in Every Stage


With advanced automated equipment, we provide fully customized hot water tank solutions as your requirements. For inner water tank materials and capacity design to outer shell structure, connection interfaces, brand logo, and packaging, every detail can be customized to match your product and market needs.
Our OEM & ODM hot water tank services help water heater manufacturers develop products faster while maintaining consistent quality and performance.
Different Water Tank Materials We Provide
We provide customizable inner hot water tank materials and capacities to support different water heater brands and market requirements.
Our glass-lined water tanks offer excellent corrosion resistance and long service life for over 15 years. With strict quality control throughout the manufacturing process, this solution is ideal for cost-effective hot water tanks used in residential and standard commercial water heaters.
The material option is suitable for brands seeking a stable, long-term, and low-cost water heater tank solution.
Manufactured with high-grade stainless steel material, our stainless steel inner water tanks provide strong resistance to corrosion and high temperatures. This makes them suitable for hard water conditions and demanding residential and commercial applications where higher durability is required.
The option is ideal for brands that is targeting premium water heater products with enhanced performance and long service life.
Glass-lined water tanks are ideal for standard residential and commercial applications with stable water quality.
Hard water may cause scale buildup that reduces heat transfer efficiency over time. But our hot water tanks are designed to resist corrosion and scaling to ensure stable performance and long lifespan.
Yes. Our hot water tanks are compatible with heat pumps, boilers, electric, gas, solar water heating systems. We can customize all water heating systems solutions.
Yes. Our hot water tanks can be configured for indoor or outdoor installations with the proper protections. Our hot water tanks have served for many extremely-cole regions.
We designed our hot water tanks based on the local insulation standards. And if you need some special requirements, our technical teams will confirm the specifications with you, such as connection sizes, interfaces, and configurations, ensuring our hot water tank match your product and market needs.

















