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A solar circulation pump moves water through a collector loop and back to the storage tank, so the two numbers that matter most are the flow rate it delivers and the liquid temperature it is rated to handle. Many pumps in this category are sold for pools, fountains or aquariums, and their ratings are often far below what a hot loop can reach. Check the maker’s stated limit before you match a pump to a loop, and review how control works in solar water heater controls and sensors.
Power type matters as much as flow. AC circulators need a standard outlet, while the 12V and 24V DC pumps below depend on an included adapter or a separate DC supply, so confirm what is in the box. Some pumps also state they cannot run dry or cannot be immersed in hot water above a set point, which affects where you can mount them. For context on high-temperature exposure, see solar water heater temperature problems.
Every specification on this page comes from each product’s Amazon listing, checked on 6 November 2026. We have not used these products ourselves, so the picks are based on published specifications only.
For the temperature side of a loop, read pressure and temperature safety in solar water heaters and preventing scalding from solar hot water.
Quick picks
- Best for AC hot water loops: Wassermann 115V Smart ECM Circulator Pump. Three speed modes and a liquid rating stated to 230°F.
- Best for a 12V setup with adapter: SENSTREE DC 12V Solar Hot Water Heater Circulation Brushless Little Pump. Adapter included and a stated 176°F liquid rating.
- Best for timed running: WiseWater 110V Circulation Pump with Timer. Built-in timer for setting run periods.
- Best for 24V systems: Thincol 24V DC Brushless Solar High Temperature Water Pump. 24V DC rating with a stated solar temperature difference use.
115V Smart ECM Circulator Pump with 3 Control
DC 12V Solar Hot Water Heater Circulation
WiseWater 110V Circulation Pump with Timer
Solar Water Pump, 24V DC Brushless Solar
How we chose these
- Liquid temperature rating Compare the highest liquid temperature each maker states, and treat a missing figure as unknown.
- Flow and head Flow shows how much water the pump moves, and head shows how high it can lift water against resistance.
- Power and included parts Note whether the voltage is AC or DC and whether a power adapter, couplers or clamps are included.
- Installation limits Look for statements on self-priming, dry running, submersion and the need for water to flow into the inlet.
These criteria come from what each maker states on its product page. Where a maker gives no figure, the table says Not stated.
Comparison table
| Product | Max flow | Max head | Max liquid temp | Best for |
|---|---|---|---|---|
| 1. Wassermann 115V Smart ECM | 11.89 GPM | 13.45 ft | 230°F | AC hot water loops with three modes |
| 2. WEPUMP RS15-9SB | 8 GPM | 39.4 ft | 212°F (100°C) | AC solar heater loops, 3/4 in NPT |
| 3. WiseWater 110V with Timer | 10 GPM | 21.6 ft | Not stated | Timed hot water recirculation |
| 4. SHYLIYU Cast Iron Booster | 11 GPM | 36 ft | Not stated | Cast iron booster for solar loops |
| 5. bayite BYT-7A014 | 2.1 GPM | 9.8 ft | 131°F (55°C) | Low-flow 12V loops, adapter sold separately |
| 6. bayite BYT-7A015 | 2.1 GPM | 9.8 ft | 212°F (100°C) | 12V loops with adapter included |
| 7. SENSTREE Solar Brushless Pump | 800 L/H (210 GPH) | 5 m (16 ft) | 176°F (80°C) | 12V loops with adapter included |
| 8. Subtoy 12V DC Circulation Pump | 3.43 GPM | 19.6 ft | 131°F (55°C) | Solar heaters fed by existing flow |
| 9. DACO MIN 14A DC 12V | 3.43 GPM | 19.6 ft | 131°F (55°C) | 12V solar heater loops with adapter |
| 10. Qiangsens DC 12V Solar | 2.64 GPM (10 LPM) | 13.1 ft (4 m) | 212°F | Household solar hot water with adapter |
| 11. Threlaco 12V DC with Adapter | 8 LPM | 3 m | Not stated | Solar hot water kits with couplers |
| 12. HuiYu DC 12V Hot Water | 3.5 GPM (800 LPH) | 18 ft (5.5 m) | 100°C rated | Hot water loops, power supply included |
| 13. Thincol 24V DC Brushless | 10 L/min | 6 m | Not stated | 24V solar temperature difference loops |
| 14. FTVOGUE Mini DC 24V | 1300 L/H | 800 m (as listed) | Not stated | 24V solar water heater loops |
Values are the maker’s stated figures. Not stated means the maker gave no figure, so confirm it before you buy.
AC circulator pumps
These pumps run on a standard 110V or 115V outlet and suit tanks near an outlet.
1. Wassermann 115V Smart ECM Circulator Pump: AC hot water loops that need speed control
Pros
- Three selectable modes
- Stainless steel head
- Liquid rating stated to 230°F
Cons
- Needs a 115V AC outlet
- Ambient limit is 104°F
Wassermann describes a 115V ECM circulator with a digital screen that shows status, flow, power use and mode. A setting button moves the pump between three performance modes, labeled C1, C2 and C3.
The maker says the stainless steel pump head can handle liquid up to 230°F and pressures up to 145 PSI.
- Motor rated at 30W (Wassermann)
- Ambient temperature limit of 104°F (Wassermann)
2. WEPUMP NPT 3/4 Domestic Automatic Booster Pump RS15-9SB: AC pump for heating or solar heater loops
Pros
- Stated fluid range to 100°C
- Stainless steel 304 head
- Highest head in this group
Cons
- Maker excludes liquids with solid particles, fibers or oil
- Ambient limit is 40°C
WEPUMP says the unit is designed for heating systems and can add pressure or supply water in a cycle.
The maker lists a fluid temperature range of 0 to 100°C and an ambient limit of 40°C, and says the pump head is stainless steel 304.
- Power of 120W at 110V and 60Hz (WEPUMP)
- Inlet and outlet are NPT 3/4 inch (WEPUMP)
3. WiseWater 110V Circulation Pump with Timer: timed hot water recirculation
Pros
- Built-in run timer
- Adapters included
- Quiet operation claimed by maker
Cons
- Liquid temperature limit not stated by the maker
- 110V AC power needed
WiseWater says the built-in timer lets you set how long the pump runs, which the maker presents as a way to save energy.
The maker lists a maximum flow of 10 GPM and a head range of 21.6 ft, and includes 3/4 to 1/2 inch NPT brass adapters with gaskets.
- Rated at 115W (WiseWater)
- Sound level as low as 30 dB (WiseWater)
4. SHYLIYU 115V/60Hz Cast Iron Pressure Booster Pump: cast iron booster for solar or boiler loops
Pros
- Cast iron housing
- Maker names solar system use
- 3/4 inch NPT outlet
Cons
- Liquid temperature limit not stated
- Booster wording is the maker's, so confirm rating before a hot loop
SHYLIYU lists a cast iron pump housing with a PP impeller and a stainless steel shaft, and names solar system, boiler and hot water use.
The maker describes the unit as a booster that keeps steady pressure in a household tank.
- Motor wire is 100% copper (SHYLIYU)
- Max flow of 40 L/min and max head of 11 m (SHYLIYU)
12V DC solar pumps
These pumps run on 12V DC, with an adapter included in some packages and sold separately in others.
5. bayite BYT-7A014 DC 12V Solar Hot Water Heater Circulation Pump: low-flow 12V loops with separate power
Pros
- Brushless motor
- 30 dB noise at one metre (bayite)
- Lighter pump
Cons
- No power adapter included
- Liquid limit is 131°F
- Not for immersion above 122°F
bayite describes a non-self-priming brushless pump with a 1/2 inch male thread and a brass coupler.
The maker states a 55°C maximum circulating water temperature and says the pump should not be immersed in hot water above 50°C.
- Power adapter not included (bayite)
- Service life of 30000 hours (bayite)
6. bayite BYT-7A015 DC 12V Solar Hot Water Heater Circulation Pump: 12V loops with the adapter included
Pros
- Power adapter included
- Liquid rating stated to 212°F
- Brushless motor
Cons
- Same 2.1 GPM and 9.8 ft as the version without an adapter
- Immersion limit still 122°F
bayite says this model comes with a power adapter and lists a maximum circulating water temperature of 100°C.
The maker still advises against immersing the pump in hot water above 50°C, so mounting should keep the body out of hot liquid.
- UL Listed DC power supply adapter, per bayite (bayite)
- Service life of 30000 hours (bayite)
7. SENSTREE DC 12V Solar Hot Water Heater Circulation Brushless Little Pump: 12V solar loops with adapter included
Pros
- ETL-certified adapter included
- 176°F liquid rating
- Brass fittings included
Cons
- Listed uses include pool, aquarium and home brew, so confirm the rating for your loop
SENSTREE says the pump is submersible but cannot be immersed in hot water, and lists a maximum circulating water temperature of 80°C.
The maker lists 1/2 inch male thread with brass hose fittings and says the motor is brushless.
- ETL Certified power supply adapter, 12V and 2A rated (SENSTREE)
- Noise below 35 dB (SENSTREE)
8. Subtoy 12V DC Solar Water Heater Circulation Pump: solar heater loops fed by existing flow
Pros
- Maker states a 12-month warranty
- Brass couplings
- Flow and lift both stated
Cons
- Needs water already flowing into the inlet
- Not for open tanks
- 131°F limit
Subtoy states that the unit only moves water already flowing into its inlet and does not work as a suction device.
The maker says it is not designed to draw from open tanks or unpressurized sources, and rates it to 131°F.
- 12-month warranty (Subtoy)
- Brushless motor described as quiet (Subtoy)
9. DACO MIN 14A DC 12V Water Pump Circulation Pump: 12V solar heater loops with adapter
Pros
- Adapter included
- Brushless motor
- Flow and lift stated
Cons
- Rated to 131°F
- Non-self-priming design
DACO MIN says the pump has a brushless motor and a 1/2 inch male thread for connecting to standard PVC hoses and pipes.
The maker states it is designed to withstand 55°C and includes brass couplings with a 10 mm outside diameter.
- Brass couplings with 10 mm OD (DACO MIN)
- Adapter included, per the product title (DACO MIN)
10. Qiangsens DC 12V Solar Water Heater Circulating Pump: household solar hot water with adapter
Pros
- Kit includes adapter, coupler, clamp and tape
- 212°F stated
- IP68 rating
Cons
- Maker says it is not self-priming
- Noise stated as 30 dB or less
Qiangsens lists a circulating water temperature range from -4°F to 212°F and says the pump is waterproof to IP68.
Qiangsens says the package ships with a power adapter, a brass fitting, a clamp and pipe sealing tape.
- Load current of 1.4A (Qiangsens)
- Service life of at least 40000 hours (Qiangsens)
11. Threlaco 12V DC Circulation Pump with Adapter: solar hot water kits with couplers
Pros
- Complete kit with adapter and clamps
- IP68 rating stated
- 85% efficiency claimed
Cons
- Liquid temperature limit not stated
- Maker notes it is non-self-priming
Threlaco says the kit includes a DC power adapter, two brass couplers and two hose clamps.
The maker describes a brushless DC motor with an efficiency up to 85% and an IP68 rating.
- Rated life stated in intermittent cycles, not hours (Threlaco)
- Insulation class F (Threlaco)
12. HuiYu DC 12V Small Water Pump Hot Water Circulation Pump: hot water loops with power supply included
Pros
- Power supply included
- 100°C rating
- 3.5 GPM flow
Cons
- Must not run dry, per maker
- Not for immersion above 158°F
- Noise rated at 40 dBA
HuiYu says the pump is rated for 0 to 100°C and includes a power supply, two water nozzles, a seal ring and hose clamp.
The maker says the pump is strictly not to run dry and should not be immersed in hot water above 70°C.
- Rated current 1.7A and max power 18W (HuiYu)
- Noise 40 dBA at one metre and life of 25000 hours (HuiYu)
24V DC pumps
These pumps run on 24V DC and suit systems built around a 24V supply.
13. Thincol 24V DC Brushless Solar High Temperature Water Pump: 24V solar temperature difference loops
Pros
- 24V DC
- Two working modes stated
- Ceramic shaft stated
Cons
- Maximum liquid temperature not stated by the maker
- Power supply not stated
Thincol describes a high temperature resistant circulating pump that runs on DC 24V at 18W, and lists solar heat collection and temperature difference cycles among its uses.
The maker says the pump has two working modes and can run without diving or when submerged in cold water.
- Noise below 30 dB and normal operation at 40 dB (Thincol)
- Ceramic shaft and magnetically isolated stator (Thincol)
14. FTVOGUE Mini DC Brushless Circulation Pump 24V: 24V solar water heater loops
Pros
- 24V DC
- Flow of 1300 L/H stated
- Resin-sealed body per maker
Cons
- Listed lift of 800 m should be confirmed with the maker
- Liquid temperature limit not stated
FTVOGUE describes a DC brushless solar high temperature pump for circulation and says it is for family home thermal solar systems.
The maker says the pump has low power use and a damping design meant to reduce motor vibration.
- Voltage of 24 volts and listed as solar powered (FTVOGUE)
- Item weight 0.21 kg (FTVOGUE)
Which one fits you
| Your situation | Look at | Why |
|---|---|---|
| You have a standard outlet near the tank | AC circulator pumps | They run on the outlet you already have, and the maker’s ratings are listed on each product. |
| You want a 12V pump with the adapter in the box | 12V DC pumps with adapter included | You avoid buying a separate DC supply, and you still need to check the liquid temperature rating. |
| You need a timed run schedule | WiseWater 110V with Timer | The built-in timer lets you set how long the pump runs. |
| You are building a 24V system | 24V DC pumps | These match a 24V supply and their listings name solar heating loops. |
Practical tips
- Check the liquid temperature rating against your loop, and do not assume a pump is rated for hot water unless the maker says so.
- Confirm whether the power adapter, couplers and clamps are included before you order.
- Check whether the pump is self-priming, and confirm water is already flowing into the inlet where the maker requires it.
- Read the immersion limit as well as the maximum temperature, since some makers say the pump cannot be submerged in hot water.
FAQ
Do all of these pumps need to be submerged?
No. Some makers say their pumps are submersible while others say they can run out of water, so read each maker’s installation note.
Which pumps include a power adapter?
bayite BYT-7A015, SENSTREE, DACO MIN, Qiangsens, Threlaco and HuiYu list an adapter or power supply in the package. bayite BYT-7A014 does not.
Can a circulation pump draw water from an open tank?
Subtoy says its pump is not designed for that. It needs water already flowing into the inlet.
Sources
Specifications from each product’s Amazon listing, checked 6 November 2026: Wassermann 115V Smart ECM Circulator Pump, WEPUMP NPT 3/4 Domestic Automatic Booster Pump RS15-9SB, WiseWater 110V Circulation Pump with Timer, SHYLIYU 115V/60Hz Cast Iron Pressure Booster Pump, bayite BYT-7A014 DC 12V Solar Hot Water Heater Circulation Pump, bayite BYT-7A015 DC 12V Solar Hot Water Heater Circulation Pump, SENSTREE DC 12V Solar Hot Water Heater Circulation Brushless Little Pump, Subtoy 12V DC Solar Water Heater Circulation Pump, DACO MIN 14A DC 12V Water Pump Circulation Pump, Qiangsens DC 12V Solar Water Heater Circulating Pump, Threlaco 12V DC Circulation Pump with Adapter, HuiYu DC 12V Small Water Pump Hot Water Circulation Pump, Thincol 24V DC Brushless Solar High Temperature Water Pump, FTVOGUE Mini DC Brushless Circulation Pump 24V. Makers can change specifications; check the product page before you buy.
