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Microline S1229RS TFC Reverse Osmosis Membrane 50 GPD
Q&As
Microline S1229RS TFC Reverse Osmosis Membrane 50 GPD
Q&As
Part Number:
S1229RS
Alt Part Number:
S1228RS
S1229RS-RC
S-1229RS
S1340RS
...
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High performance RO membrane delivers up to 50 gallons per day of clean purified drinking water.
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Description
This thin film composite (TFC) reverse osmosis membrane is the factory-specified replacement for Microline TFC-35A, TFC-35S, TFC-335, and TFC-435 RO systems. Producing 50 gallons per day, this membrane represents an upgrade from the original 35 GPD model it replaced — while retaining the same part number, it delivers meaningfully improved output capacity without any changes to fit or installation.
As the core of any reverse osmosis system, the membrane is responsible for the heavy lifting — rejecting dissolved solids, contaminants, and impurities at the molecular level to produce clean, purified water. Its push-in with O-ring connection makes replacement straightforward, and the membrane should be replaced every 24 months under normal use conditions to ensure your system continues to perform at its rated capacity. Water quality and usage levels may affect how frequently replacement is needed.
- TFC (thin film composite) membrane produces 50 GPD — an upgrade from the original 35 GPD model it superseded, with the same part number and fit
- Direct replacement for Microline TFC-35A, TFC-35S, TFC-335, and TFC-435 RO systems
- Push-in with O-ring connection for straightforward replacement
Specs
- Flow Rate: 50 Gallons Per Day
- Dimensions: 12" x 2.5"
- Replace every 24 months
Features
This Item Fits These Select Systems
Overall rating: 4.909091 / 5 from 11 reviews.
AI Generated Review Summary
Summary topics
Review topics: [installation, filters].
Review highlights
Reviews
A great company.
"Employees always provide a professional and expedite attention."
Installation was quick and easy
"Installation was quick and easy"
😃
"😃"
Working fine!
"Working fine!"
Very good filters.
"Very good filters."
Thanks ESP water
"I am very happy that I found ESP water products online. The place that I usually get all my filters were overcharging me, the prices here are very reasonable and I will continue to buy all of my reverse osmosis products from ESP water."
Easy to buy. Quick to
"Easy to buy. Quick to ship. Works perfectly in my system."
Best one yet
"This filter was installed by a professional plumber when we had our RO system installed. When it came time to replace it I used a different filter with the same specs and didn’t mention anything to my wife. I thought our RO water was a little off but it wasn’t terrible. She knew right away and said something was wrong. I ordered this filter and told her it was probably time to change the filter. This filter totally does the job even though the specs were the same. I’m only using this particular filter from now on in our RO system."
Substitute filter
"I was sent a similar membrane filter than the one I ordered. Was told it was compatible. So far it is working. We will have to see if it continues to function correctly."
Filters for systems
"Freeman is fantastic to work with"
Q&A
- After changing the the three filter cartridges and turning the system back on is there a waiting time before using the system and drinking the water .. I noticed a black charcoal push from the faucet when I turned the water on
- After replacing all the filters on your RO system, it is recommended to allow 2-3 gallons of treated water to dispense from the RO faucet before you begin drinking the water. For detailed instructions on turning on and testing the RO system after installing filters, see the following link: https://espwaterproducts.com/pages/how-to-change-an-ro-filter-and-membranes?utm_source=viqua
Q:
What is the rated production of the Microline S1229RS?
A:
The membrane is rated for up to 50 gallons per day under its specified test conditions. Actual production varies with feed pressure, temperature, dissolved-solids level, and membrane condition.
Q:
Which systems does the Microline S1229RS fit?
A:
The catalog lists S1229RS, TFC-300, TFC-335, TFC-400, TFC-400-ESP, TFC-435, Impression 4. Check the exact model or part number on the existing equipment before ordering Microline S1229RS.
Q:
What size and configuration should I verify?
A:
Confirm the existing part number and the push-in membrane with O-ring connection format before ordering. Also match the housing or twist-in head, seals, and any required flow-control components. This 50 GPD version supersedes earlier 35 GPD S1229RS applications while retaining the same replacement position.
Q:
How often should this RO membrane be replaced?
A:
A common interval is about 24 months, but incoming water quality, prefilter maintenance, and water use affect service life. Test product-water TDS and replace sooner if rejection or production declines.
Q:
Does a higher GPD rating always mean better performance?
A:
No. The membrane rating must match the system design, pressure, flow restrictor, and storage configuration. Installing a different capacity can upset the permeate-to-drain balance.
Q:
What should I do after installing a new RO membrane?
A:
Confirm all seals and tubing connections, restore water slowly, check for leaks, and follow the system instructions for flushing before using the product water.
