---
product_id: 212859302
title: "Dow Filmtec TW30-1812-50HR 50 GPD Reverse Osmosis Membrane (Replaces Dow Filmtec TW30-1812-50) Undercounter and Countertop RO Membrane"
brand: "dow filmtec"
price: "₨24481"
currency: LKR
in_stock: true
reviews_count: 6
category: "Dow Filmtec"
url: https://www.desertcart.lk/products/212859302-dow-filmtec-tw30-1812-50hr-50-gpd-reverse-osmosis-membrane
store_origin: LK
region: Sri Lanka
---

# 50 GPD water output 99% stabilized salt rejection Made in USA quality Dow Filmtec TW30-1812-50HR 50 GPD Reverse Osmosis Membrane (Replaces Dow Filmtec TW30-1812-50) Undercounter and Countertop RO Membrane

**Brand:** dow filmtec
**Price:** ₨24481
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your water purity with the ultimate RO membrane upgrade!

## Quick Answers

- **What is this?** Dow Filmtec TW30-1812-50HR 50 GPD Reverse Osmosis Membrane (Replaces Dow Filmtec TW30-1812-50) Undercounter and Countertop RO Membrane by dow filmtec
- **How much does it cost?** ₨24481 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/212859302-dow-filmtec-tw30-1812-50hr-50-gpd-reverse-osmosis-membrane)

## Best For

- dow filmtec enthusiasts

## Why This Product

- Trusted dow filmtec brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Boost Your Hydration Game:** Up to 20% more water production than competitors keeps you ahead of the curve.
- • **Engineered for Efficiency:** Operates silently and efficiently under high pressure and temperature for consistent performance.
- • **Seamless Upgrade Experience:** Direct replacement for TW30-1812-50 with easy installation and QR code authenticity check.
- • **Pure Performance, Every Drop:** 99% stabilized salt rejection ensures crystal-clear, contaminant-free water.
- • **Built to Last, Made in the USA:** Premium American manufacturing guarantees reliability and authenticity.

## Overview

The Dow Filmtec TW30-1812-50HR is a high-rejection reverse osmosis membrane delivering 50 gallons per day with up to 20% more water output than competitors. Made in the USA, it offers 99% stabilized salt rejection, operates efficiently under pressures up to 150 psig and temperatures up to 113°F, and features a QR code for authenticity verification. Ideal for undercounter and countertop RO systems, it ensures premium water quality with easy installation.

## Description

Dow Filmtec TW30-1812-50HR 50 GPD High Rejection Reverse Osmosis Membrane manufactured in the USA. This membrane replaces Filmtec TW30-1812-50 reverse osmosis membrane. Thin film composite membrane delivering up to 20% greater water output than competing brands. Maximum Operating Temperature 113°F (45°C). Maximum Operating Pressure150 psig (10bar). Maximum Feed Flow Rate 2.0 gpm (7.6 lpm). pH Range, Continuous Operation 2–11. Maximum Feed Silt Density Index (SDI) SDI5. Stabilized salt rejection 98% (performance measured by manufacturer at 250 ppm NaCl, 77F, and 15% water recovery). Free Chlorine Tolerance <0.1ppm. Maximum temperature for continuous operation above pH10 is 95F (35C). QR code on label for authenticity confirmation.

Review: Works Great - When the RODI, got loud, I knew it was time. I used to need more GPD, so I had gone to higher flow parts, then as my need lessened, I decided to go to nearer the original configuration, dropping to 50gpd was part of the process. the change over was easy (compared to when i expanded it). it is silent, and runs more efficiently, and the water when tested was 0.00 - perfect, especially for a fresh water aquarium.
Review: As advertised. - .

## Features

- Authentic Dow Filmtec Membrane. Made in the USA.
- Up to 20% more water production
- 99% Stabilized Salt Rejection
- 1. Worldwide Selling Membrane

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08CL49G8H |
| Best Sellers Rank | #253,207 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,776 in Replacement Under-Sink Water Filters |
| Brand | Dow Filmtec |
| Customer Reviews | 4.4 4.4 out of 5 stars (18) |
| Date First Available | July 8, 2020 |
| External Testing Certification | NSF |
| Global Trade Identification Number | 00850008227431 |
| Item Weight | 6.4 ounces |
| Item model number | Filmtec TW30 1812 50HR |
| Material | Resin Polypropylene (PP) |
| Number of Items | 1 |
| Product Benefits | Enhances water output |
| Product Dimensions | 12 x 1.9 x 1.9 inches |
| Set Name | TW30-1812-50HR |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Dow Filmtec
- **External Testing Certification:** NSF
- **Item Weight:** 0.18 Kilograms
- **Material:** Resin Polypropylene (PP)
- **Product Benefits:** Enhances water output

## Images

![Dow Filmtec TW30-1812-50HR 50 GPD Reverse Osmosis Membrane (Replaces Dow Filmtec TW30-1812-50) Undercounter and Countertop RO Membrane - Image 1](https://m.media-amazon.com/images/I/21EsFmU8MqL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works Great
*by K***R on April 5, 2025*

When the RODI, got loud, I knew it was time. I used to need more GPD, so I had gone to higher flow parts, then as my need lessened, I decided to go to nearer the original configuration, dropping to 50gpd was part of the process. the change over was easy (compared to when i expanded it). it is silent, and runs more efficiently, and the water when tested was 0.00 - perfect, especially for a fresh water aquarium.

### ⭐⭐⭐⭐⭐ As advertised.
*by T***. on January 16, 2025*

.

### ⭐⭐⭐⭐ Dow Filmtec TW30-1812-50HR 50 GPD Reverse Osmosis Membrane
*by Z***K on June 3, 2022*

I have measured the rejection rate of the membrane a few days in a row. The numbers are consistent between 90% and 92%. These numbers are acceptable, but with Dow Filmtec brand I expected the rejection rate between 95% and 97%. This is why I am giving the membrane four stars.

## Frequently Bought Together

- Dow Filmtec TW30-1812-50HR 50 GPD Reverse Osmosis Membrane (Replaces Dow Filmtec TW30-1812-50) Undercounter and Countertop RO Membrane
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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-01-29*