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FilmTec 1812-100 GPD Membrane – Domestic Reverse Osmosis Membrane
₺4,487.80
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- SKU
- WP-MB-017
- Category
- RO Membranes, Water Filters, Water Treatment Spare Parts
FilmTec · 1812 Size · 100 GPD
Higher Daily Output with the FilmTec 1812-100 GPD Membrane
The FilmTec 1812-100 GPD membrane is a 1812-size reverse osmosis element of polyamide thin-film composite construction, chosen for homes and offices with high consumption or for lines with low mains pressure. According to the manufacturer’s data it delivers 100 gallons of product water per day, approximately 16 litres per hour, at 50 psi (3.4 bar). In the same 1812 body size, it offers a rated output one third higher than a 75 GPD element.
- Rated Output
- 100 GPD
- Hourly Output
- ≈16 Litres
- Maximum Feed
- 7.6 L/min
01Problem & Solution
A Tank That Cannot Keep Up, a Longer Wait
Problem
Consumption Has Risen, Output Has Not
When drinking and cooking water consumption rises in a busy home or office, the tank empties during the day and takes a long time to refill. On lines with low mains pressure, the water produced by the membrane already falls below its rated value; with a low-capacity element this shortfall grows even larger.
Solution
Higher Rated Output in the Same Size
The FilmTec 1812-100 GPD membrane offers a rated output of 100 gallons per day at 3.4 bar without changing the 1812 body size. In a suitable unit the tank fills faster; on low-pressure lines, part of the loss in output is offset by the higher rated value.
02Key Features
An Element Suited to Heavy Use
The FilmTec 1812-100 GPD membrane is an element made for users who want a higher daily output in standard 1812 dimensions.
100 GPD Rated Output
At a test pressure of 50 psi (3.4 bar) it delivers 100 gallons of product water per day, approximately 16 litres per hour.
Standard 1812 Body
With a length of 298 mm and a diameter of 44.5 mm it fits membrane housings with a nominal 2 inch inner diameter.
7.6 L/min Feed Limit
The maximum feed flow rate that can be supplied to the element is 2.0 gpm, i.e. 7.6 litres per minute.
Polyamide TFC Layer
The thin-film composite layer lets water through and leaves most of the dissolved salts to the concentrate.
Dry Shipping
The element is shipped dry, which makes transport and storage easier.
Cleaning Tolerance
It can be used within pH 2–11 in continuous operation and pH 1–12 for short-term cleaning.
03Technical Specifications
Membrane Specifications
| Feature | Value | What it does |
|---|---|---|
| Brand | FilmTec | The manufacturer. The valve and membrane brand decides how easily spares can be found. |
| Model | 1812-100 | The manufacturer’s model code. Spares and service are matched by this code. |
| Product Type | Domestic RO Membrane Element | The product family it belongs to. When buying a spare, the family alone is not enough; the size and model must match too. |
| Membrane Type | Polyamide Thin-Film Composite | The structure of the membrane. Chlorine burns it, so a carbon filter in front is essential. |
| Daily Output | 100 GPD (≈378 Litres) | How much treated water it produces in a day. |
| Hourly Output | ≈16 Litres | |
| Test Pressure | 50 psi (3.4 bar) | |
| Test Water | 250 ppm Softened Mains Water | |
| Test Conditions | 25 °C · 15% Recovery | |
| Maximum Feed Flow Rate | 7.6 L/min (2.0 gpm) | |
| Size | 298 × 44.5 mm (11.74" × 1.75") | The physical size. If a spare does not match this, it will not go into the housing. |
| Product Water Tube | 17 mm (0.68") Inner Diameter | |
| Compatibility | Nominal 2" Membrane Housing | Which units and housings it works with. Compare it with yours before ordering. |
| Maximum Temperature | 45 °C | |
| pH (Continuous) | 2 – 11 | |
| pH (Short-Term Cleaning) | 1 – 12 | |
| Maximum SDI | 5 | |
| Free Chlorine | < 0.1 ppm | |
| Shipping | Dry |
04Applications
Where Is It Used?
The FilmTec 1812-100 GPD membrane is used in units with 1812 membranes where consumption is high or mains pressure is low.
Busy HouseholdsOffice KitchensLow-Pressure Mains LinesUnder-Sink Units with a PumpHigh-Capacity Domestic ROSmall BusinessesCapacity UpgradesSpare for Technical Service
05How It Works
How Does the FilmTec 1812-100 GPD Membrane Work?
FilmTec is DuPont’s reverse osmosis membrane brand; series and brand information is available on DuPont’s FilmTec page. Like other domestic membranes, the 100 GPD element works under pressure; the difference is a higher rated output in the same size.
It Arrives from the Pre-Filters
Having passed through the sediment and activated carbon filters, with its free chlorine held back, the water is directed to the membrane housing.
Pressure and Flow Are Applied
Mains pressure or the pump pushes the water into the 2 inch housing; the feed flow should stay within the 7.6 L/min limit.
Separation in the Polyamide Layer
Water molecules pass through the thin-film layer; most of the dissolved salts remain on the surface.
Product Water Goes to the Tank
The treated water collects in the central tube with a 17 mm inner diameter and is carried to the tank through the product water outlet of the housing.
The Concentrate Is Discharged
The substances held back by the membrane are sent to the drain through the waste line together with the concentrate.
06Making the Right Choice
FilmTec 1812-100 GPD Membrane or 75 GPD?
The FilmTec 1812-100 GPD membrane and the 75 GPD element fit the same housing; the choice depends on daily consumption, mains pressure and the unit’s equipment.
Daily Consumption
If consumption is at a standard level, 75 GPD may be enough; if the tank often runs empty during the day, 100 GPD is preferred.
Mains Pressure
The ratings are measured at 3.4 bar; on low-pressure lines output falls, and a higher rating partly offsets this loss.
System Compatibility
When moving to a higher GPD rating, the suitability of the waste water flow restrictor, pump and tank arrangement should be checked.
Feed Flow Rate
In units with a pump, the feed to the element should not exceed 7.6 L/min.
07Maintenance and Use
Maintenance Notes for High Output
Because the FilmTec 1812-100 GPD membrane produces more water, the pre-filters also handle more water; the maintenance schedule should be planned accordingly.
- Change the sediment and activated carbon pre-filters on time according to how heavily the unit is used; once the carbon is saturated, chlorine reaches the membrane.
- When putting it into service for the first time, do not use the water produced in the first hours; send this water to the drain.
- In units with a pump, have it checked that the feed flow does not exceed 7.6 L/min.
- Make sure the water temperature does not exceed 45 °C; do not connect the unit to a hot water line.
- If the tank filling time becomes longer or the TDS of the product water rises, have the pre-filters checked first, then the membrane.
08Frequently Asked Questions
Common Questions
What does the FilmTec 1812-100 GPD membrane do?
It is the treatment stage of a domestic reverse osmosis unit and offers a higher rated output in the standard 1812 size. As the water that has passed through the pre-filters crosses the polyamide layer, most of the dissolved salts are separated into the concentrate; the element delivers 100 gallons of product water per day at 3.4 bar.
How much water does it produce per hour and per day?
The manufacturer specifies 100 gallons per day at a test pressure of 3.4 bar; that is approximately 378 litres per day, or about 16 litres per hour. The value is measured under test conditions of 250 ppm and 25 °C and may vary by ±20% from element to element.
Can it be fitted in place of a 75 GPD membrane?
The FilmTec 1812-100 GPD membrane is the same size as the 75 GPD element and fits the same 2 inch housing. However, if the unit was equipped for a 75 GPD membrane, the change should not be made without checking the waste water flow restrictor and the pump for compatibility; if you are unsure, ask for technical guidance.
How much does it produce at low pressure?
The output of the FilmTec 1812-100 GPD membrane falls as pressure and water temperature drop; on lines below 3.4 bar, actual output stays below 100 GPD. A unit with a pump helps close this gap; in pump-free use, expectations should be set according to the mains pressure.
Why does the maximum feed flow rate matter?
The maximum feed flow rate that can be supplied to the element is 2.0 gpm, i.e. 7.6 L/min. This value is one of the element’s operating limits; in units with a pump, the pump and line arrangement should be checked against this limit.
Does the membrane come with a warranty?
Units, valves, pumps and tanks carry a 2-year warranty and taps a 1-year warranty. Filters, membranes, resin and salt are consumables and fall outside the warranty.
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Warranty
ConsumableThis product is classed as a consumable or spare part; because its life depends on use, it is not covered by warranty. Faulty or incorrectly shipped items are replaced — just get in touch with us.
Withdrawal and returns
Distance sales agreementThe right of withdrawal and the return terms are set out in detail in the distance sales agreement. Systems that have been installed and commissioned, and made-to-order products, are outside its scope.
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