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- 4 x 4040 Membranes.
- 50% Recovery.
Weight is estimated.
Information available on request.
RO Plants such as these are usually only supplied when an analysis has been done on the raw water, without knowing what is in the water we cannot guarantee this plant will suite your needs. Pre-filtration likely will be required.
- Stage 1 : Polypropylene Sediment Reduction Cartridge (MICROFIL 5um).
- Stage 2 : Granular Activated Carbon Cartridge.
- Stage 3 : Carbon Block Cartridge (5um).
- Stage 4 : Reverse Osmosis Membrane.
- Stage 5 : Post Carbon Cartridge (T33).
- Fits in standard 1.8" x 12" residential RO membrane housings.
VONTRON® Residential Membrane Elements
Brief Introduction
Being suitable for the desalting treatment of those water sources with salt concentration lower than 2000 ppm, such as surface water, underground water, tap water and municipal water, etc., ULP series are mainly applicable to numerous applications of various sizes, such as pure water, boiler water replenishment, foodstuff processing, and pharmaceutical production, etc.
Specifications and Major Properties
Average Permeated Flow: 75 GPD
Stable Rejection Rate: 97.5%
Minimum Rejection Rate: 96.0%
Testing Conditions:
Temperature of Testing Solution 25°C
Concentration of Testing Solution (NaCl) 250ppm
pH Value of Testing Solution 7.5
Recovery Rate of Single Membrane Element 15%
Extreme Operation Conditions:
Max. Feedwater Temperature: 45°C
Max. Feedwater SDI: 5
Free Chlorine Concentration of Feedwater <0.1ppm
pH Range of Feedwater during Continuous Operation: 3~10
pH Range of Feedwater during Chemical Cleaning: 2~12
Max. Pressure Drop of Single Membrane Element: 10psi(0.07Mpa)
Important Information
2. The permeate flow listed in the table is the average value. The permeate flow of single membrane element is within a tolerance not exceeding ±20% of the nominal value.
3. All wet-type membrane elements have been strictly tested before leaving the factory, and have been treated with the solution of 1.0% sodium hydrogen sulfite (an antifreeze solution of 10% propanediol required in winter) for storage purpose, then sealed with plastic bag in vacuum, and further packed in carton boxes. In order to prevent the breeding of microbes during short-time storage, transportation and system standby, we recommend you to soak the membrane elements with protective solution (prepared with RO filtered water) containing 1.0% sodium hydrogen sulfite (foodstuff-purpose).
4. Discard the RO-filtered water produced during the first one hour after system start-up.
5. During storage time and run time, it is strictly prohibited to dose any chemical medicament that may be harmful.
- Contains Mixed-Bed Resin.
- Media can be regenerated manually with salt.
- 1/4" Female fittings on ends.
- Reusable: Can be refilled.
This filter is installed after the RO process before the tank or in-line to the faucet.
Recommended to be used on RO systems with a TDS under 15. We cannot confirm if the TDS will be zero after if the TDS from the RO is over 10.
- Model: ULP21-4040
- Reject: 99.0%
- Average Permeate GPD(m3/d): 2400(9.1)
- Active Membrane Area ft2(m2): 90(8.4)

Stage 1 : Polypropylene Cartridge – 5 Micron Superfine Filter – Removes solid particles & impurities i.e. silt & rust.
Stage 2 : Granular Activated Carbon (UDF) Filter – Absorbs odours, chemicals & chlorine.
Stage 3 : Carbon Block Filter (CTO) – removes additional chlorine & water decolourants.
Stage 4 : Reverse Osmoses Membranes – Removes up to 0.0001 microns colloid, metals, germs & bacteria.
Stage 5 : Post Carbon Filter (T33) – improves water taste.
If your water pressure is above 6 bar you will need a pressure reducing valve to keep your pressure within the operating pressure limits.
- This unit produces up to 400 Gallons or 1500 litres every 24 hours.
- This unit has two pumps, an electrical outlet is required nearby.
- This unit has four VONTRON 100GPD membranes.
- This unit includes a 40LT RO Storage Tank and a Standard Elegant RO Faucet (not shown in picture).
- This unit can be modified with a float switch to fill up larger tanks, such as JoJo Tanks, as seen in this photo.
We recommend that a plumber install the unit as a pressure reducing valve may be required.
You can replace the 100GPD membranes with 125GPD membranes to get up to 500GPD/1900LPD from this unit.
- 1 x 4040 Membrane.
- 50% Recovery.
Weight is estimated.
Information available on request.
RO Plants such as these are usually only supplied when an analysis has been done on the raw water, without knowing what is in the water we cannot guarantee this plant will suite your needs. Pre-filtration most likely will be needed.
- Fits in standard 1.8" x 12" residential RO membrane housings.
VONTRON® Residential Membrane Elements
Brief Introduction
Being suitable for the desalting treatment of those water sources with salt concentration lower than 2000 ppm, such as surface water, underground water, tap water and municipal water, etc., ULP series are mainly applicable to numerous applications of various sizes, such as pure water, boiler water replenishment, foodstuff processing, and pharmaceutical production, etc.
Specifications and Major Properties
Average Permeated Flow: 50 GPD
Stable Rejection Rate: 97.5%
Minimum Rejection Rate: 96.0%
Testing Conditions:
Temperature of Testing Solution 25°C
Concentration of Testing Solution (NaCl) 250ppm
pH Value of Testing Solution 7.5
Recovery Rate of Single Membrane Element 15%
Extreme Operation Conditions:
Max. Feedwater Temperature: 45°C
Max. Feedwater SDI: 5
Free Chlorine Concentration of Feedwater <0.1ppm
pH Range of Feedwater during Continuous Operation: 3~10
pH Range of Feedwater during Chemical Cleaning: 2~12
Max. Pressure Drop of Single Membrane Element: 10psi(0.07Mpa)
Important Information
2. The permeate flow listed in the table is the average value. The permeate flow of single membrane element is within a tolerance not exceeding ±20% of the nominal value.
3. All wet-type membrane elements have been strictly tested before leaving the factory, and have been treated with the solution of 1.0% sodium hydrogen sulfite (an antifreeze solution of 10% propanediol required in winter) for storage purpose, then sealed with plastic bag in vacuum, and further packed in carton boxes. In order to prevent the breeding of microbes during short-time storage, transportation and system standby, we recommend you to soak the membrane elements with protective solution (prepared with RO filtered water) containing 1.0% sodium hydrogen sulfite (foodstuff-purpose).
4. Discard the RO-filtered water produced during the first one hour after system start-up.
5. During storage time and run time, it is strictly prohibited to dose any chemical medicament that may be harmful.
Reverse Osmosis is a process where water is demineralised using a semi permeable membrane at high pressure. Your normal filtration units will only reduce certain contaminants such as silt, rust, chlorine and bacteria (up to 96%). Reverse Osmosis machines will purify your water up to 99.9% or 0.001 microns, thus removing other dissolved contaminants like Colloid, lead, mercury, germs and other metals.
Stage 1 : Polypropylene Cartridge – 5 Micron Superfine Filter – Removes solid particles & impurities i.e. silt & rust.
Stage 2 : Granular Activated Carbon (UDF) Filter – Absorbs odours, chemicals & chlorine.
Stage 3 : Reverse Osmoses Membrane – Removes up to 0.0001 microns colloid, metals, germs & bacteria.
Stage 4 : DI Resin – Deionizer post filter to reduce TDS further.
Operating Pressure: 50 - 100 psi (3.5 to 6.5 bar)
This unit produces up to 50 Gallons or 190 litres every 24 hours (up to 130ml/minute).
This unit does not include a pump, no electricity required.
This unit does not include automatic shutoff, a tank or faucet, you get what is in the picture plus 1M of RO tubing and a ball valve and ball valve adapter to connect to the mains and a housing wrench.
All options purchased include assembly onto the main unit where applicable.
Reverse Osmosis is a process where water is demineralised using a semi permeable membrane at high pressure. Your normal filtration units will only reduce certain contaminants such as silt, rust, chlorine and bacteria (up to 96%). Reverse Osmosis machines will purify your water up to 99.9% or 0.001 microns, thus removing other dissolved contaminants like Colloid, lead, mercury, germs and other metals.
Stage 1 : Polypropylene Cartridge – 5 Micron Superfine Filter – Removes solid particles & impurities i.e. silt & rust.
Stage 2 : Granular Activated Carbon (UDF) Filter – Absorbs odours, chemicals & chlorine.
Stage 3 : Carbon Block Filter (CTO) – removes additional chlorine & water decolourants.
Stage 4 : Reverse Osmoses Membrane – Removes up to 0.0001 microns colloid, metals, germs & bacteria.
Stage 5 : Post Carbon Filter (T33) – improves water taste.
Faucet and all necessary installation fittings are included.
Operating Pressure: 50 - 100 psi (3.5 to 6.5 bar)
If your water pressure is above 6 bar you will need a pressure reducing valve to keep your pressure within the operating pressure limits.
This unit produces up to 50 Gallons (189 litres) every 24 hours.
10L Storage tank is included but not shown in picture.
This unit has a pump, an electrical outlet is required nearby.
We recommend that a plumber install the unit as a pressure reducing valve may be required.
Automatically shuts off the water supply when the tank pressure (or permeate pressure) reaches ~65% of the incoming line pressure.
Without a shut-off block (or solenoid in case of RO with pump) the RO would be wasting water permanently even when the tank is full.
Reverse Osmosis is a process where water is demineralised using a semi permeable membrane at high pressure. Your normal filtration units will only reduce certain contaminants such as silt, rust, chlorine and bacteria (up to 96%). Reverse Osmosis machines will purify your water up to 99.9% or 0.001 microns, thus removing other dissolved contaminants like Colloid, lead, mercury, germs and other metals.
Stage 1 : Polypropylene Cartridge – 5 Micron Superfine Filter – Removes solid particles & impurities i.e. silt & rust.
Stage 2 : Granular Activated Carbon (UDF) Filter – Absorbs odours, chemicals & chlorine.
Stage 3 : Carbon Block Filter (CTO) – removes additional chlorine & water decolourants.
Stage 4 : Reverse Osmoses Membrane – Removes up to 0.0001 microns colloid, metals, germs & bacteria.
Stage 5 : Post Carbon Filter (T33) – improves water taste.
Faucet and all necessary installation fittings are included.
Operating Pressure: 50 - 100 psi (3.5 to 6.5 bar)
If your water pressure is above 6 BAR you will need a pressure reducing valve to keep your pressure within the operating pressure limits.
If your water pressure is below 3.5 BAR the RO will not produce any water, in this case you need the RO with a booster pump, if unsure you should rather buy the RO with the pump.
This unit produces up to 50 Gallons (189 litres) every 24 hours where water pressure is at least 5 BAR.
10L Storage tank.
This unit does not have a pump and does not use electricity.
We recommend that a plumber install the unit as a pressure reducing valve may be required.
*Unit may differ to image due to multiple suppliers.
Model | Active Membrane Area ft2(m2) | Average Permeated Flow GPD (m3/d) | Stable Rejection Rate (%) | Minimum Rejection Rate (%) |
ULP1812-50 | 3.5(0.32) | 50(0.19) | 97.5 | 96.0 |
ULP1812-75 | 4.2(0.38) | 75(0.28) | 97.5 | 96.0 |
ULP1812-100 | 5.0(0.46) | 100(0.38) | 95.0 | 93.0 |

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