---
product_id: 305644187
title: "APEC Water Systems SET 3 Pcs 3.5\" O.D. Replacement O-Ring For Reverse Osmosis Water Filter Housings, 3 Count (Pack of 1), Black"
brand: "apec water"
price: "€ 22.88"
currency: EUR
in_stock: true
reviews_count: 5
category: "Apec Water"
url: https://www.desertcart.pt/products/305644187-apec-water-systems-set-3-pcs-3-5-o-d
store_origin: PT
region: Portugal
---

# Lightweight & easy install Leak-proof NSF-compliant seal 3.5 inch diameter precision fit APEC Water Systems SET 3 Pcs 3.5" O.D. Replacement O-Ring For Reverse Osmosis Water Filter Housings, 3 Count (Pack of 1), Black

**Brand:** apec water
**Price:** € 22.88
**Availability:** ✅ In Stock

## Summary

> 💧 Seal the deal with leak-proof confidence!

## Quick Answers

- **What is this?** APEC Water Systems SET 3 Pcs 3.5" O.D. Replacement O-Ring For Reverse Osmosis Water Filter Housings, 3 Count (Pack of 1), Black by apec water
- **How much does it cost?** € 22.88 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/305644187-apec-water-systems-set-3-pcs-3-5-o-d)

## Best For

- apec water enthusiasts

## Why This Product

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

## Key Features

- • **Complete Leak Defense:** Set of 3 O-rings covers all standard pre-filter housings for full system protection
- • **Durability That Lasts:** NSF-compliant material ensures long-lasting leak protection and peace of mind
- • **Effortless Maintenance:** Lightweight design makes installation and replacement a breeze—no plumber needed
- • **Authenticity Guaranteed:** Buy genuine APEC parts to avoid costly leaks and maintain system integrity
- • **Precision Fit, Zero Drip:** 3.5-inch O-rings engineered for a flawless seal in APEC RO housings

## Overview

This APEC Water Systems 3-pack of 3.5-inch O-rings offers a precise, NSF-compliant seal designed specifically for standard reverse osmosis filter housings. Lightweight and easy to install, these durable O-rings prevent leaks and ensure your water filtration system runs smoothly. Recommended for replacement with every filter change to avoid costly water damage, this genuine APEC set guarantees authenticity and reliable performance.

## Description

The O-RING-SET contains 3 pieces of 3.5 in. O.D. standard industry size O-RING use to prevent leaks when customer need to change 3 pre-filter of 10 in. standard under sink reverse osmosis system. Recommend to change all O-RINGs once open the housing. Lubricate with clean lubricant and place in grooves below thread to prevent water leaks. APEC Water Systems does not distribute or sell our products to any 3rd party sellers on desertcart. Please purchase genuine APEC Water system product in “new” condition from desertcart.Com or APEC Water directly for authenticity. depending on factors such as use of product, where the product was purchased, or whom you purchased the product from..

Review: They work fine but these should really be included with the filter cartridge since they recommend replacement with every filter change. I rank these high though because after a year on the system, they still looked like they were brand new and could be used again. I still changed them just because they are cheaper than a flooded house and not worth the risk.
Review: المنتج صينى و الوصف اونطه مش امريكى و كاليفورنيا بس شغال لولا انى محتاجه كنت رجعته علشان يتعلم التاجر الصدق فى الوصف و طبعا السعر غالى بما انه صينى مش امريكى و محطوط فى كيس غريب

## Features

- IMPORTANT: A set of 3 O-rings for standard filter housings of APEC RO systems. Please kindly check the second gallery image for compatibility of this O-Ring set
- Light weight, easy install and unload
- Diameter 3.5 inch OD
- Included components: O-RING-SET

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01IDVIG30 |
| Best Sellers Rank | #56,782 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #70 in Faucet O-Rings |
| Brand | APEC WATER |
| Color | Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,963) |
| Date First Available | 31 August 2016 |
| Diameter | 3.5 Inches |
| Item Weight | 14 g |
| Material | NSF-compliant |
| Model Number | O-RING-SET |

## Product Details

- **Brand:** APEC WATER
- **Colour:** Black
- **Item diameter:** 3.5 Inches
- **Material:** NSF-compliant
- **Nominal inside diameter:** 3.25 Inches

## Images

![APEC Water Systems SET 3 Pcs 3.5" O.D. Replacement O-Ring For Reverse Osmosis Water Filter Housings, 3 Count (Pack of 1), Black - Image 1](https://m.media-amazon.com/images/I/51MocFzG0-L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***R on 8 February 2025*

They work fine but these should really be included with the filter cartridge since they recommend replacement with every filter change. I rank these high though because after a year on the system, they still looked like they were brand new and could be used again. I still changed them just because they are cheaper than a flooded house and not worth the risk.

### ⭐⭐ Review
*by H***M on 12 July 2025*

المنتج صينى و الوصف اونطه مش امريكى و كاليفورنيا بس شغال لولا انى محتاجه كنت رجعته علشان يتعلم التاجر الصدق فى الوصف و طبعا السعر غالى بما انه صينى مش امريكى و محطوط فى كيس غريب

### ⭐⭐⭐⭐⭐ Review
*by G***Z on 15 January 2025*

Les trois seal ont très bien fonctionné système Osmos rev 5 stage

## Frequently Bought Together

- APEC Replacement ORing for ROES-50 3.5" OD Reverse Osmosis Water Filter Housings, O-Ring (3 pcs O-Ring-Set-A)
- APEC ESSENCE Series 50 GPD Complete Replacement Filter For Undersink System(FILTER-MAX-ES50)

---

## 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.pt/products/305644187-apec-water-systems-set-3-pcs-3-5-o-d](https://www.desertcart.pt/products/305644187-apec-water-systems-set-3-pcs-3-5-o-d)

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-04-23*