---
product_id: 258795938
title: "TW30-1812-50 Reverse Osmosis Membrane, Blue"
brand: "dow filmtec"
price: "$276.46"
currency: USD
in_stock: true
url: https://www.desertcart.ec/products/258795938-tw30-1812-50-reverse-osmosis-membrane-blue
store_origin: EC
region: Ecuador
---

# 50 GPD high flow rate Fits standard 1.8" x 12" housings 98% stabilized salt rejection TW30-1812-50 Reverse Osmosis Membrane, Blue

**Brand:** dow filmtec
**Price:** $276.46
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your water game with the membrane trusted by pros!

## Quick Answers

- **What is this?** TW30-1812-50 Reverse Osmosis Membrane, Blue by dow filmtec
- **How much does it cost?** $276.46 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/258795938-tw30-1812-50-reverse-osmosis-membrane-blue)

## 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

- • **Built to Last:** Constructed with durable polyamide thin-film composite material, resisting chlorine damage with proper pre-filtration.
- • **Certified Trust:** NSF/ANSI Standard 58 listed for guaranteed safety and reliability in your water filtration system.
- • **Seamless Compatibility:** Designed to fit standard 1.8" x 12" RO housings for effortless upgrades and replacements.
- • **Unmatched Salt Rejection:** 98% stabilized salt rejection ensures your water is cleaner and healthier than ever.
- • **Pure Performance, Every Drop:** Delivers up to 50 gallons of crystal-clear water daily, perfect for your home hydration needs.

## Overview

The Dow Filmtec TW30-1812-50 is a premium reverse osmosis membrane designed for residential water purification. Rated at 50 gallons per day, it offers 98% stabilized salt rejection and fits standard 1.8" x 12" membrane housings. NSF/ANSI Standard 58 certified, this durable polyamide thin-film composite membrane ensures consistent, high-quality water filtration when paired with appropriate pre-filters.

## Description

Dow Filmtec TW30-1812-50 Reverse Osmosis Membrane, Blue

## Features

- 98% Stabilized Salt Rejection (Minimum Rejection 96%)
- NSF/ANSI Standard 58 listed
- Membrane Dimensions: 11.75" Overall Length, 1.75" Diameter (Fits Standard 2" ID Membrane Housings)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Dow Filmtec |
| Part number | TW30181250 |
| Item Weight | 181 g |
| Product Dimensions | 29.85 x 4.45 x 4.45 cm; 181 g |
| Item model number | TW30-1812-50 |
| Size | 1 Count (Pack of 1) |
| Color | Blue |
| Style | RO Membrane |
| Material | Polyamide Thin-Film Composite |
| Pattern | RO Membrane |
| Item Package Quantity | 1 |
| Temperature Range | 113 Degrees Fahrenheit |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Polyamide Thin-Film Composite
- **Product dimensions:** 4.4D x 29.8W x 4.4H centimeters
- **Item weight:** 181 Grams
- **External testing certification:** NSF
- **Product benefits:** Produces 50 Gallons per Day of Purified Water at 99% Salt Rejection

## Images

![TW30-1812-50 Reverse Osmosis Membrane, Blue - Image 1](https://m.media-amazon.com/images/I/51ks0o8OUWL.jpg)

## Questions & Answers

**Q: Is there a difference in product between model numbers tw30-1812-50d, tw30-1812-50, and tw30-1812-50 gpd tfc?**
A: Not really, they are all the same size and 50 gpd membranes. Different companies have different part numbers for them.  The D on one is for dry pack, in which almost all are dry pack you will see. There are some wet pack but you do not see them often. Both are the same and work the same. The tfc just means thin film composite in which all these are the same, they are tfc

**Q: Dow website shows only "tw30-1812-50hr". this one is missing "hr". what is the difference ?**
A: I am not positive but I believe the last digit is the maximum flow rate of the RO in gallons per hour.

**Q: will it fit express water ro5dx or global water ro505**
A: Yes.

**Q: What is the difference between the tw30-1812-50 and the tw30-1812-36 membrane? thanks.**
A: The tw30-1812-50 will produce 50 gpd (gallons per day) of filtered water. The other is rated to filter 36 gpd. These are not interchangeable, as your system has to have a flow restrictor to match the flow specification of the membrane. There is a good explanation of this on www.waterfiltersonline.com.

## Frequently Bought Together

- Dow Filmtec TW30-1812-50 Reverse Osmosis Membrane , Blue
- Home Master ISetTMA8 Artesian And HydroGardener Replacement Water Filter Change Set, White
- Home Master Iset-TMA-HGP Filter Change Set, 3 Count (Pack of 1), White

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ec/products/258795938-tw30-1812-50-reverse-osmosis-membrane-blue](https://www.desertcart.ec/products/258795938-tw30-1812-50-reverse-osmosis-membrane-blue)

---

*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-02-22*