What types of water pumps does RETO manufacture?

RETO designs and manufactures brushless DC (BLDC) water pumps for smart toilets, new energy vehicle thermal management, water heater circulation and boosting, all-in-one water purifiers, ice makers, water-heated mattresses, industrial chillers, macerator systems, beer brewing equipment and coffee machines.

Which certifications does RETO hold?

RETO operates under IATF 16949 and ISO 9001 quality management systems and holds TÜV certification. Products comply with CE, RoHS and REACH. The company is recognized as a National High-Tech Enterprise, an SRDI (specialized, refined, distinctive and innovative) enterprise and a high-growth Gazelle enterprise.

Can RETO develop a customized pump for my application?

Yes. RETO's R&D team includes more than 10 senior engineers, each with over 10 years of industry experience in motor design, control systems, hydraulics and structural design. Custom designs are validated through laboratory and real-application testing before mass production.

What information is needed for an accurate custom pump proposal?

Please share the pumped medium and its temperature range, required flow rate and head, supply voltage, control method such as PWM speed control or FG feedback, duty cycle and expected service life, installation space and port dimensions, noise target, and the certifications required for your target market.

What is RETO's production capacity?

With automated and semi-automated production lines, RETO's annual output exceeds 2 million pump units. Key processes undergo 100% inspection to keep quality consistent across large OEM orders.

Why choose a brushless DC pump instead of a brushed DC pump?

A brushless DC pump has no carbon brushes to wear out, so it typically offers a longer service life, lower operating noise and less electromagnetic interference. Electronic commutation also allows precise speed control, which makes BLDC pumps well suited to continuous-duty appliances and vehicle cooling loops.

Custom 12V Recirculation Pump for Solar Water Heater Factories, Factory

1 / 5

Custom 12V Recirculation Pump for Solar Water Heater Factories, Factory

Our hot water recirculating pump conquers solar lag. It silently returns cooled water to the tank, ensuring taps deliver instant heat — no wait, no waste, always ready. The CWP020G/F is purpose-built for solar thermal systems, handling extreme temperature swings from freezing winters to scorching summers while consuming minimal energy.

Model No: CWP020G / CWP020F

RATED POWER: 17W (CWP020G) / 18W (±10%) (CWP020F)

MAX FLOW: 10.5 L/min (CWP020G) / 9.5 L/min (±10%) (CWP020F)

MAX HEAD: 6 m (CWP020G) / 5.5 m (±0.5 m) (CWP020F)

Send Inquiry

Product Description

Product Details

Extreme Temperature Tolerance

Solar systems face freezing winters and scorching summers with wild temperature fluctuations. Unlike standard pumps, this unit handles extreme media temperatures without cracking or leaking, ensuring reliable operation year after year.

Energy Efficient Operation

This hot water recirculating pump runs on just 17–18W. It activates only when needed to circulate water and stops once the target temperature is reached, keeping long-term electricity costs barely noticeable.

Thermostat-Driven Instant Hot Water

The built-in thermostat monitors return line temperature in real time. When temperature drops below the set point, the pump activates; once the target is reached, it stops — delivering instant hot water at every tap without continuous circulation waste.

Silent Brushless Motor

Engineered with high-grade brushless DC technology, providing continuous and quiet operation suitable for quiet home environments.

Product Details 2 (2) In Line Hot Water Pump

Product Details 2 Electric Hot Water Pump

Applications

Wall-Mounted Solar Water Heaters Circulates cooled water from the delivery line back to the storage tank, eliminating the wait for hot water at distant taps.

Pressure-Bearing Water Tanks Maintains consistent pressure and temperature stratification in pressurized solar storage systems.

Separated Type Solar Water Heaters Bridges the circulation loop between rooftop collectors and indoor storage tanks in split-system installations.

"Zero Cold Water" Instant Hot Water Systems Enables instant hot water at every tap by pre-circulating cooled water before the user opens the tap.

Gas and Electric Water Heaters Reduces cold water waste by returning cooled water to the heater for reheating.

Heating Systems and Gas Boilers Serves as a small circulation pump in radiant floor heating and boiler loops.

Specifications

Please contact us for the full datasheet including dimensions and material specifications.

SPECIFICATION		FEATURE
MODEL: CWP020G/F
		AMBIENT TEMP	-25~55℃
		HUMIDITY	SUBMERSIBLE
		MEDIUM	PURE WATER/ANTIFREEZE
		MEDIUM TEMP	-15~100℃
		WATERPROOF	IP68
		CONSTANT/CONTINUOUS PRESSURE	1.8MPa/0.5MPa
RATED VOLTAGE	12V, 24V DC	COLOR	BLACK
RATED CURRENT	1.42, 0.75(1±10%)A	WEIGHT	216 g
RATED POWER	17W, 18 (1±10%) W	NOISE	≦ 40dB@1m
MAX FLOW	10.5, 9.5±1 L/min	LIFETIME	≧5000H
MAX HEAD	6, 5.5±0.5 m	INSULATION	F (155℃)

Specification 2 Water Pump For Hot Water Tank

Customization

RETO offers tailored pump solutions with the following customization options:

Custom PWM frequency and duty cycle parameters for variable-speed temperature control

FG (RPM) signal wire for closed-loop flow monitoring and fault detection

Custom voltage, flow, or head specifications to match your system design

Custom connectors and wiring configurations for plug-and-play integration

OEM branding, labeling, and packaging

Custom wetted parts materials for specific water quality conditions

Cumulatively providing customized services for 100+ well-known brands around the world, we deliver professional, tailored solutions for every project.

Frequently Asked Questions

Q: What is the difference between CWP020G and CWP020F?

The CWP020G delivers higher flow (10.5 L/min) and higher head (6 m) at 17W, while the CWP020F provides 9.5 L/min at 5.5 m head with 18W. Choose based on your system's flow and head requirements.

Q: How does the thermostat function work?

The pump activates when water temperature in the return line drops below the set point and stops once the target temperature is reached, eliminating continuous circulation waste.

Q: Is this pump suitable for indoor installation?

Yes, the brushless motor operates silently, making it suitable for installation near living spaces, inside utility closets, or within water heater enclosures.

Q: What voltage does it require?

12V DC, providing inherent electrical safety in wet environments.

Q: Can this pump be used with gas water heaters?

Yes, it reduces cold water waste in gas-fired systems by returning cooled water to the heater for reheating.

Q: Can you provide OEM/ODM service?

Yes, we offer customized solutions including PWM parameters, connectors, branding, and packaging.

Get a Quote

Need a reliable, silent hot water recirculating pump for your solar water heater or instant hot water system? Send your system specifications, flow requirements, voltage preferences, and production volume targets to get a quote from RETO.