Why did my tds go from 0 to 2. I flushed for 2 hours tds started at 1 then went to 2. With my old 3 year old filter I was at 0 tds

There might be different reasons causing this problem. It is better to empty the tank 2-3 times after changing filters. You may also replace other filters and sanitize the system if you need to. You may check online about how to sanitize your water filter system. Please remove all the filters from the system before you start to sanitation procedure. If these don’t solve the problem, you may contact with Amazon customer service to return the item.

Is this Filmtec membrane made by Dow or Dupont?

DuPont merged with FilmTec company and became a part of Dow FilmTec. Eventually, they will produce all the Residential FilmTec Membranes, and we started selling them too.

is this made in usa? I see another listing with the same numbers on it that says "residential" and it says imported.. Its Dow and numbers are the same

i be leave if it says imported , its still an American product that's just assembled in another country. Dont worry they work real good ,Total TDS 000.

does this fit the 10"x2.5" canisters

The housing size for this membrane is approximately 12.5” x 2.5”. If your housing size is 10 inch, this membrane can’t fit in because the membrane itself measures as 11-3/4” x 1-3/4”. However, if you are replacing the same brand (Dow Filmtec) undersink RO membrane, there won’t be a problem. You may also check with your RO manufacturer.

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FilmTec, BW60-1812-75 75 gpd TFC Membrane for Undersink Reverse Osmosis (RO) System (Replaces Model TW30-1812-75)

FilmTec, BW60-1812-75 75 gpd TFC Membrane for Undersink Reverse Osmosis (RO) System (Replaces Model TW30-1812-75)

Product ID: 66194658

Details

External Testing Certification
ANSI NSF
Item Weight
6.4 ounces
Material
Carbon
Product Benefits
Removes
Product Dimensions
1.75"D x x

💧75 GPD capacity

📏Fits standard 1.8" x 12" housings

🛡️98% salt rejection

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Description

💧 Elevate your hydration game with the membrane trusted by pros and millennials alike!

SEAMLESS COMPATIBILITY - Fits all standard 2" ID membrane housings for effortless upgrades.
ULTRA EFFICIENT 75 GPD OUTPUT - Purify up to 7.9 liters per hour—never run out of crisp, clean water.
NSF ANSI STANDARD 58 CERTIFIED - Trust in certified safety and performance for your home’s drinking water.
DURABLE THIN FILM COMPOSITE TECH - Advanced membrane design ensures long-lasting, consistent filtration—stay ahead of water quality worries.
INDUSTRY LEADING 98 SALT REJECTION - Experience superior taste and health benefits with near-total impurity removal.

The FilmTec BW60-1812-75 is a premium Thin-Film Composite reverse osmosis membrane delivering 75 gallons per day with 98% stabilized salt rejection. Certified to NSF/ANSI Standard 58, it fits standard 1.8" x 12" housings and offers superior durability and efficiency, making it the go-to choice for high-quality home water purification.

Specifications

ASIN	B079VPWRBP
Best Sellers Rank	#42,926 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #304 in Replacement Under-Sink Water Filters
Brand	Dow Filmtec
Brand Name	Dow Filmtec
Customer Reviews	4.6 out of 5 stars 534 Reviews
External Testing Certification	ANSI, NSF
Global Trade Identification Number	00826333000063, 07898962510407
Included Components	New membrane
Item Dimensions D x W x H	1.75"D x 11.74"W x 1.75"H
Item Type Name	Filmtec membrane
Item Weight	0.4 Pounds
Manufacturer	Filmtec
Manufacturer Part Number	TW30181275
Material	Carbon
Material Type	Carbon
Model Number	TW30
Number of Items	1
Product Benefits	Removes Impurities
Product Dimensions	1.75"D x 11.74"W x 1.75"H
Set Name	75 GPD
UPC	826333000063
Unit Count	1.0 Count

Reviews

G**8

18.05.2025

A**B

13.01.2026

P**K

30.12.2025

J**.

2.01.2020

T**M

25.10.2025

M**N

4.01.2020

K**K

8.02.2026

C**C

25.01.2026

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In stock

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vietnam.

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