---
product_id: 19716470
title: "Brondell RF-40 Membrane Water Filter Replacement for Circle Under Sink Reverse Osmosis Filtration System, Lasts 24 Months"
brand: "brondell"
price: "₨3280"
currency: SCR
in_stock: true
reviews_count: 8
category: "Brondell"
url: https://www.desertcart.sc/products/19716470-brondell-rf-40-membrane-water-filter-replacement-for-circle-under
store_origin: SC
region: Seychelles
---

# 24-month lifespan WQA certified 64 contaminant removal DIY twist & seal install Brondell RF-40 Membrane Water Filter Replacement for Circle Under Sink Reverse Osmosis Filtration System, Lasts 24 Months

**Brand:** brondell
**Price:** ₨3280
**Availability:** ✅ In Stock

## Summary

> 💧 Elevate your hydration game with Brondell’s premium RO membrane—because clean water waits for no one.

## Quick Answers

- **What is this?** Brondell RF-40 Membrane Water Filter Replacement for Circle Under Sink Reverse Osmosis Filtration System, Lasts 24 Months by brondell
- **How much does it cost?** ₨3280 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/19716470-brondell-rf-40-membrane-water-filter-replacement-for-circle-under)

## Best For

- brondell enthusiasts

## Why This Product

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

## Key Features

- • **Effortless upgrade:** Quick twist-and-seal installation means no plumber needed—refresh your water in minutes.
- • **Long-lasting purity:** Enjoy up to 24 months of crystal-clear water without frequent replacements.
- • **Sustainably designed:** Part of Brondell’s eco-conscious lineup, helping you protect the planet’s essential resources.
- • **Smart filter monitoring:** Built-in change indicator with replacement battery keeps you ahead of filter life.
- • **Certified contaminant defense:** WQA-certified to reduce 64 harmful contaminants including heavy metals and fluoride.

## Overview

The Brondell RF-40 is a WQA-certified reverse osmosis membrane filter designed for the Circle Under Sink RO system. It effectively reduces 64 contaminants including heavy metals, fluoride, and industrial chemicals, delivering superior water quality. With a 24-month lifespan and easy DIY twist-and-seal installation, it features a built-in change indicator and replacement battery for hassle-free maintenance. Engineered for sustainability, this filter ensures your home enjoys consistently pure water while supporting eco-friendly living.

## Description

desertcart.com: Brondell RF-40 Membrane Water Filter Replacement for Circle Under Sink Reverse Osmosis Filtration System, Lasts 24 Months : Tools & Home Improvement

Review: Delivered WET? Don't freak out. - So, this is the first time I have had to replace my Brondell Reverse Osmosis filter. I have replaced the other pre/post filters twice and now it' was time to change the RO element. I always dread this part of the cycle on RO systems because it is EXPENSIVE.....but this is how these systems work and deliver clean water. I previously had a GE system... and I used to operate an RO system on our boat (to turn sea water into drinking water). Having dealt with the pre and post filter set several times I noted that these filter come in a box, are individually wrapped and sealed, and are DRY. This time I noted that the RO element seemed heavier. It was in a sealed box and was individually sealed in a pouch as well. When I opened it and took of the cap, liquid dripped out. Initially I was worried that someone had returned a used filter and desertcart sent it back out to me. Even though it seemed to be sealed I wouldn't put it past a dishonest person to run this back through a bag sealer and return it for the $100 bucks. Then I remembered from my boating days that Reverse Osmosis membranes have to stay wet. When they go for an extended time of no use they must be "pickled" or BRINED in a special storage fluid. I was starting to think these are no different. I hooked it all up, drained the system per the instructions, and tested the water. I was horrified to see that it was producing water that had 290 PPM (parts per million) of TDS (total disolved solids). The water out of the tap was 513 PPM. The water out of my 2 year old RO filter was 80PPM. This was horrible. So, thinking that I might have gotten a used filter, I sent an email to Brondell support. As I waited for a response I decided to run the system through several more flush cycles. This involves running the water out of the resevoir tank until it's empty, then allowing it to refill (about a 1 hour process). Low-and-behold, each flush revealed a slightly better water test. After I erformed a total of 8 flushes, the Brodell Circle system with all new filters is producing water at about 40PPM TDS. For a reference, good bottled drinking water is about 20-25 ppm TDS. I'm happy with this. After a few days passed I got a response from Brondell support. The verified that the RO filters are indeed shipped wet/brined. They were surpised that it toon so many flush cycles to get to 40PPm.... but I feel SO much better knowing that I am not drinking from someone else's rotten recylcled filter. I f YOU get a wet RO filter.. and the box seal is in place and the wrapper bag is intact... DON'T freak out. This is how it is supposed to be. BRONDELL.... it might be a good idea to print this on the RO filter box somewhere to allay customer fears (especially since the other 3 filters are shipped dry). The Brondell Circle is a great system. It is so much simpler and the filter cycle and change procedure is indeed much easier that other systems I have had. I feel well assured that the water we are drinking and making coffee from is the best we can get.
Review: Circle RO replacement filter. - A vital part of our Circle water system. Thanks for having this in stock!

## Features

- CRYSTAL CLEAR BENEFITS: The reverse osmosis membrane filter separates clean water molecules from contaminants and reduces heavy metals, cysts, fluoride, arsenic, industrial chemicals, and more
- WATER QUALITY ASSOCIATION CERTIFICATION: Holds WQA certification for reduction of 64 contaminants when used with the Circle Reverse Osmosis Under Sink Water Filtration System (certified under NSF/ANSI standards 42, 53, 58, and 372)
- SIMPLE DIY INSTALLATION: The replacement filter can be installed in just a few minutes with a quick and easy twist and seal installation; The change indicator lets you know when a new filter is needed; Includes filter indicator replacement battery
- We design hygiene products that help protect our planet’s essential resources. From water-saving showers and air purifiers to bidets that help reduce toilet paper and energy use, we’re helping you live more sustainably and it feels better already.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Best Sellers Rank | #12,552 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #116 in Replacement Under-Sink Water Filters |
| Brand | Brondell |
| Customer Reviews | 4.5 out of 5 stars 741 Reviews |
| External Testing Certification | WQA |
| Item Weight | 1.2 Pounds |
| Material | Plastic |
| Product Benefits | Removes Pollutants |
| Product Dimensions | 2.75"D x 2.75"W x 11.25"H |

## Product Details

- **Material:** Plastic
- **Product Dimensions:** 2.75"D x 2.75"W x 11.25"H
- **Item Weight:** 1.2 Pounds
- **External Testing Certification:** WQA
- **Product Benefits:** Removes Pollutants

## Images

![Brondell RF-40 Membrane Water Filter Replacement for Circle Under Sink Reverse Osmosis Filtration System, Lasts 24 Months - Image 1](https://m.media-amazon.com/images/I/81EXL0Tja9L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Delivered WET? Don't freak out.
*by J***N on June 23, 2024*

So, this is the first time I have had to replace my Brondell Reverse Osmosis filter. I have replaced the other pre/post filters twice and now it' was time to change the RO element. I always dread this part of the cycle on RO systems because it is EXPENSIVE.....but this is how these systems work and deliver clean water. I previously had a GE system... and I used to operate an RO system on our boat (to turn sea water into drinking water). Having dealt with the pre and post filter set several times I noted that these filter come in a box, are individually wrapped and sealed, and are DRY. This time I noted that the RO element seemed heavier. It was in a sealed box and was individually sealed in a pouch as well. When I opened it and took of the cap, liquid dripped out. Initially I was worried that someone had returned a used filter and Amazon sent it back out to me. Even though it seemed to be sealed I wouldn't put it past a dishonest person to run this back through a bag sealer and return it for the $100 bucks. Then I remembered from my boating days that Reverse Osmosis membranes have to stay wet. When they go for an extended time of no use they must be "pickled" or BRINED in a special storage fluid. I was starting to think these are no different. I hooked it all up, drained the system per the instructions, and tested the water. I was horrified to see that it was producing water that had 290 PPM (parts per million) of TDS (total disolved solids). The water out of the tap was 513 PPM. The water out of my 2 year old RO filter was 80PPM. This was horrible. So, thinking that I might have gotten a used filter, I sent an email to Brondell support. As I waited for a response I decided to run the system through several more flush cycles. This involves running the water out of the resevoir tank until it's empty, then allowing it to refill (about a 1 hour process). Low-and-behold, each flush revealed a slightly better water test. After I erformed a total of 8 flushes, the Brodell Circle system with all new filters is producing water at about 40PPM TDS. For a reference, good bottled drinking water is about 20-25 ppm TDS. I'm happy with this. After a few days passed I got a response from Brondell support. The verified that the RO filters are indeed shipped wet/brined. They were surpised that it toon so many flush cycles to get to 40PPm.... but I feel SO much better knowing that I am not drinking from someone else's rotten recylcled filter. I f YOU get a wet RO filter.. and the box seal is in place and the wrapper bag is intact... DON'T freak out. This is how it is supposed to be. BRONDELL.... it might be a good idea to print this on the RO filter box somewhere to allay customer fears (especially since the other 3 filters are shipped dry). The Brondell Circle is a great system. It is so much simpler and the filter cycle and change procedure is indeed much easier that other systems I have had. I feel well assured that the water we are drinking and making coffee from is the best we can get.

### ⭐⭐⭐⭐⭐ Circle RO replacement filter.
*by J***H on January 20, 2026*

A vital part of our Circle water system. Thanks for having this in stock!

### ⭐⭐⭐⭐⭐ Pure Clean Water
*by V***R on July 31, 2025*

Great quality filter. As part of a 4 filter system, this definitely keeps your water purified. Great quality, doesn’t leak, extremely easy and simple to install. Highly recommend this brand.

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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-02-07*