EC20 Series Salt Chlorinator, 20 g/h, for Pools up to 85 m³ (Old Model)
SKU : SC-LS-EC20-OLD-SP
1 Sold
Quantity
Short Description
Suitable for pools up to 85 m³. Compact and requires little installation space. Easy to operate and maintain, with the controller mounted on the cell assembly. Package dimensions: 16 × 34 × 25.5 cm. Gross weight: 2.87 kg. (Updated 16/07/2026)
LASWIM · EC SERIES · EC20 OLD MODEL
Important information about the EC20 Old Model
Product condition: New cream-colored unit assembled from spare parts, as stated in the product listing
Packaging: The original model packaging is unavailable; shipped in a standard parcel box
Warranty: The product listing states that the warranty is the same as for the blue model. Confirm the warranty period, terms, and included components with the seller before ordering.
Salt chlorination for small to medium residential pools
The EC20 produces chlorine by electrolyzing salt dissolved in pool water. Its integrated controller and cell save installation space. This is a new cream-colored unit assembled from spare parts, as described in the product listing. The cell plates are accessible for maintenance. Chlorine production requires a working circulation and filtration system, and pool water must still be tested regularly.
LASWIM EC20 Old Model specifications
| Model / product code | LASWIM EC20 Old Model / SC-LS-EC20-OLD-SP |
|---|---|
| Maximum chlorine output | 20 grams per hour |
| Maximum pool volume | 85 cubic meters (depending on actual chlorine demand) |
| Operating voltage / current | Use only the adapter supplied with the unit. Check the voltage and current on the actual equipment label before connecting power. |
| Pipe connections | 1.5 inches / 50 mm. Check the union size on the actual unit before installation. |
85 m³ is the maximum pool size in the reference table; it does not guarantee adequate chlorine production under all conditions. For outdoor pools or heavy use, allow extra output capacity and assess the pump operating time.
Key features
Choose from five settings with the + and buttons to match measured chlorine levels and the pools needs.
Runs at maximum output for 8 hours, then returns to the previous setting. Test chlorine before and after use.
The automatic cell-cleaning function helps reduce scale buildup, but the cell still needs regular inspection.
The display shows fault codes for conditions such as insufficient water or abnormal salt levels.
The EC Series manual describes a setting range of 124 hours. Check how to set it on the control panel of the unit supplied.
According to EC Series information, the unit remembers its last operating state when restarted.
Before installation and first use
Install in the circulation line downstream of the pump and filter, following the manual. Check flow direction and ensure adequate water flow through the cell. Design the bypass and valves to suit the sites plumbing layout.
02 · Electrical supplyHave a qualified technician check the power supply and the supplied adapter. Install residual-current protection, and ensure the chlorinator cannot receive power when the pump is stopped.
Choose a ventilated location and protect electrical components from rain, moisture, and splashes. Leave enough room to remove the cell plates.
04 · Test water before startingMeasure salinity and water quality before producing chlorine. Start the pump and confirm normal water flow through the unit.
Adding salt and maintaining water quality
The EC Series manual gives a reference salt level of approximately 3,500 ppm or 3.5 kg per 1 m³ of water. Use sodium chloride suitable for swimming pools without unsuitable additives. Always measure the existing salinity first to avoid adding too much salt.
Salt to add (kg) = pool volume (m³) × [3,500 measured salinity (ppm)] ÷ 1,000
Example: For a 20 m³ pool measuring 2,500 ppm, add approximately 20 kg if the measured salinity is below the target.
Turn off the chlorinator while adding salt. Keep the circulation pump running and distribute the salt so it does not collect on the pool floor. The manual recommends circulating the water for 24 hours, then measuring salinity again before turning on the chlorinator. Check free chlorine and pH regularly, and adjust run time or output based on actual readings.
Common fault codes
| Code | Meaning | Initial checks |
|---|---|---|
| E2 | Water temperature outside operating range | Check the water temperature and sensor |
| E3 | Insufficient water in the cell | Check the pump, valves, air in the pipework, and sensor |
| E4 | High salt level | Measure salinity with a meter before taking corrective action |
| E5 | Low salt level | Measure salinity before calculating how much salt to add |
For other codes, consult the EC Series manual and contact a technician if the issue cannot be resolved. Do not open the housing or repair electrical circuits while power is connected.
Proper cell maintenance
Inspect the cell regularly and clean it when scale accumulates. Automatic cleaning helps reduce deposits but does not replace inspection. Before removing the cell, disconnect power, stop the pump, close the relevant valves, and release pressure in the pipework. If cell-cleaning solution is needed, follow the EC Series manual and the solutions safety instructions. Do not scrape the titanium plates with metal tools.
Frequently asked questions
Can the EC20 serve an 85 m³ pool?
The product listing specifies pools up to 85 m³. However, sunlight, swimmer load, chlorine demand, and pump run time must also be considered. For a high-demand pool, assess a model with higher output.
What salinity is required?
The EC Series manual specifies a normal salinity of approximately 3,500 ppm. Measure it before adding salt, and retest after the salt has dissolved and circulated throughout the pool.
Can the chlorinator run while the pump is stopped?
No. The cell needs adequate water flow. Arrange the electrical controls so the chlorinator operates only while the circulation pump is running.
What should I check before ordering this unit?
This model is assembled from spare parts and does not come in its original model packaging. Ask the seller to confirm exactly what is included, including the adapter and pipe fittings, and verify the warranty terms before ordering.
EC Series manual in Thai: Open the user manual · Technical information is based on the LASWIM EC Series. Check the label on the actual delivered unit.
Example: estimating chlorine increase time with the EC20
How long might different pool sizes take to reach a higher chlorine level? Use these initial examples, then adjust the operating time for your actual pool.
A simple calculation
- H = estimated operating time (hours)
- Q = pool volume (m³)
- ΔPPM = desired increase in free chlorine (ppm) = target reading measured reading
- Capacity = chlorine output; the EC20 is rated at up to 20 grams per hour
This formula estimates the theoretical time to raise chlorine by the measured difference. It is not a daily operating-time recommendation because sunlight, swimmers, and contaminants consume chlorine during use.
Worked examples for three pool sizes
Assume free chlorine starts at 0 ppm, the target is 2 ppm, and the EC20 runs at its maximum output of 20 grams per hour.
| Pool volume | Calculation | Theoretical time |
|---|---|---|
| 10 m³ | (10 × 2) ÷ 20 | 1 hour |
| 20 m³ | (20 × 2) ÷ 20 | 2 hours |
| 85 m³ | (85 × 2) ÷ 20 | 8.5 hours |
If free chlorine measures 1 ppm and the target is 2 ppm, use ΔPPM = 1, not 2. Retest chlorine and adjust the actual operating time.
WINWINPOOL expert tips
- Frequent pool use or strong sunlight: Test chlorine and adjust production time based on actual readings.
- Frequent rain: Test free chlorine and pH before changing the operating time.
- Water turning green: Check chlorine, pH, and filtration to identify the cause. Do not simply raise chlorine to 3 ppm without testing the water.
- Always run the chlorinator together with the circulation pump.
In brief
For the same increase in chlorine, a smaller pool takes less time than a larger one. The formula provides an initial estimate; set the daily operating time according to pool conditions and measured water quality.
Why choose the EC20 from WINWINPOOL?
- Maximum chlorine output of 20 g/h, according to the product listing
- Adjustable chlorine output
- The product listing specifies pools up to 85 m³, subject to actual operating conditions
- Our team can advise on model selection and settings
Ask about the model and availability
Interested in the cream-colored EC20 Old Model? Want the WINWINPOOL team to check the included components and size a unit for your pool? Chat with us on LINE @winwinpool.
LASWIM · EC SERIES · EC20 OLD MODEL
Important information about the EC20 Old Model
Product condition: New cream-colored unit assembled from spare parts, as stated in the product listing
Packaging: The original model packaging is unavailable; shipped in a standard parcel box
Warranty: The product listing states that the warranty is the same as for the blue model. Confirm the warranty period, terms, and included components with the seller before ordering.
Salt chlorination for small to medium residential pools
The EC20 produces chlorine by electrolyzing salt dissolved in pool water. Its integrated controller and cell save installation space. This is a new cream-colored unit assembled from spare parts, as described in the product listing. The cell plates are accessible for maintenance. Chlorine production requires a working circulation and filtration system, and pool water must still be tested regularly.
LASWIM EC20 Old Model specifications
| Model / product code | LASWIM EC20 Old Model / SC-LS-EC20-OLD-SP |
|---|---|
| Maximum chlorine output | 20 grams per hour |
| Maximum pool volume | 85 cubic meters (depending on actual chlorine demand) |
| Operating voltage / current | Use only the adapter supplied with the unit. Check the voltage and current on the actual equipment label before connecting power. |
| Pipe connections | 1.5 inches / 50 mm. Check the union size on the actual unit before installation. |
85 m³ is the maximum pool size in the reference table; it does not guarantee adequate chlorine production under all conditions. For outdoor pools or heavy use, allow extra output capacity and assess the pump operating time.
Key features
Choose from five settings with the + and buttons to match measured chlorine levels and the pools needs.
Runs at maximum output for 8 hours, then returns to the previous setting. Test chlorine before and after use.
The automatic cell-cleaning function helps reduce scale buildup, but the cell still needs regular inspection.
The display shows fault codes for conditions such as insufficient water or abnormal salt levels.
The EC Series manual describes a setting range of 124 hours. Check how to set it on the control panel of the unit supplied.
According to EC Series information, the unit remembers its last operating state when restarted.
Before installation and first use
Install in the circulation line downstream of the pump and filter, following the manual. Check flow direction and ensure adequate water flow through the cell. Design the bypass and valves to suit the sites plumbing layout.
02 · Electrical supplyHave a qualified technician check the power supply and the supplied adapter. Install residual-current protection, and ensure the chlorinator cannot receive power when the pump is stopped.
Choose a ventilated location and protect electrical components from rain, moisture, and splashes. Leave enough room to remove the cell plates.
04 · Test water before startingMeasure salinity and water quality before producing chlorine. Start the pump and confirm normal water flow through the unit.
Adding salt and maintaining water quality
The EC Series manual gives a reference salt level of approximately 3,500 ppm or 3.5 kg per 1 m³ of water. Use sodium chloride suitable for swimming pools without unsuitable additives. Always measure the existing salinity first to avoid adding too much salt.
Salt to add (kg) = pool volume (m³) × [3,500 measured salinity (ppm)] ÷ 1,000
Example: For a 20 m³ pool measuring 2,500 ppm, add approximately 20 kg if the measured salinity is below the target.
Turn off the chlorinator while adding salt. Keep the circulation pump running and distribute the salt so it does not collect on the pool floor. The manual recommends circulating the water for 24 hours, then measuring salinity again before turning on the chlorinator. Check free chlorine and pH regularly, and adjust run time or output based on actual readings.
Common fault codes
| Code | Meaning | Initial checks |
|---|---|---|
| E2 | Water temperature outside operating range | Check the water temperature and sensor |
| E3 | Insufficient water in the cell | Check the pump, valves, air in the pipework, and sensor |
| E4 | High salt level | Measure salinity with a meter before taking corrective action |
| E5 | Low salt level | Measure salinity before calculating how much salt to add |
For other codes, consult the EC Series manual and contact a technician if the issue cannot be resolved. Do not open the housing or repair electrical circuits while power is connected.
Proper cell maintenance
Inspect the cell regularly and clean it when scale accumulates. Automatic cleaning helps reduce deposits but does not replace inspection. Before removing the cell, disconnect power, stop the pump, close the relevant valves, and release pressure in the pipework. If cell-cleaning solution is needed, follow the EC Series manual and the solutions safety instructions. Do not scrape the titanium plates with metal tools.
Frequently asked questions
Can the EC20 serve an 85 m³ pool?
The product listing specifies pools up to 85 m³. However, sunlight, swimmer load, chlorine demand, and pump run time must also be considered. For a high-demand pool, assess a model with higher output.
What salinity is required?
The EC Series manual specifies a normal salinity of approximately 3,500 ppm. Measure it before adding salt, and retest after the salt has dissolved and circulated throughout the pool.
Can the chlorinator run while the pump is stopped?
No. The cell needs adequate water flow. Arrange the electrical controls so the chlorinator operates only while the circulation pump is running.
What should I check before ordering this unit?
This model is assembled from spare parts and does not come in its original model packaging. Ask the seller to confirm exactly what is included, including the adapter and pipe fittings, and verify the warranty terms before ordering.
EC Series manual in Thai: Open the user manual · Technical information is based on the LASWIM EC Series. Check the label on the actual delivered unit.
Example: estimating chlorine increase time with the EC20
How long might different pool sizes take to reach a higher chlorine level? Use these initial examples, then adjust the operating time for your actual pool.
A simple calculation
- H = estimated operating time (hours)
- Q = pool volume (m³)
- ΔPPM = desired increase in free chlorine (ppm) = target reading measured reading
- Capacity = chlorine output; the EC20 is rated at up to 20 grams per hour
This formula estimates the theoretical time to raise chlorine by the measured difference. It is not a daily operating-time recommendation because sunlight, swimmers, and contaminants consume chlorine during use.
Worked examples for three pool sizes
Assume free chlorine starts at 0 ppm, the target is 2 ppm, and the EC20 runs at its maximum output of 20 grams per hour.
| Pool volume | Calculation | Theoretical time |
|---|---|---|
| 10 m³ | (10 × 2) ÷ 20 | 1 hour |
| 20 m³ | (20 × 2) ÷ 20 | 2 hours |
| 85 m³ | (85 × 2) ÷ 20 | 8.5 hours |
If free chlorine measures 1 ppm and the target is 2 ppm, use ΔPPM = 1, not 2. Retest chlorine and adjust the actual operating time.
WINWINPOOL expert tips
- Frequent pool use or strong sunlight: Test chlorine and adjust production time based on actual readings.
- Frequent rain: Test free chlorine and pH before changing the operating time.
- Water turning green: Check chlorine, pH, and filtration to identify the cause. Do not simply raise chlorine to 3 ppm without testing the water.
- Always run the chlorinator together with the circulation pump.
In brief
For the same increase in chlorine, a smaller pool takes less time than a larger one. The formula provides an initial estimate; set the daily operating time according to pool conditions and measured water quality.
Why choose the EC20 from WINWINPOOL?
- Maximum chlorine output of 20 g/h, according to the product listing
- Adjustable chlorine output
- The product listing specifies pools up to 85 m³, subject to actual operating conditions
- Our team can advise on model selection and settings
Ask about the model and availability
Interested in the cream-colored EC20 Old Model? Want the WINWINPOOL team to check the included components and size a unit for your pool? Chat with us on LINE @winwinpool.
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