This bundle focuses on essential components and accessories for maintaining your Express Water WH300 Series Whole House Water Filtration System. It includes the necessary replacement filters for annual changes, along with tools and maintenance items to ensure a successful and leak-free filter replacement process. This collection is ideal for homeowners looking to perform DIY maintenance on their WH300 series system.
Curated by Workshop Notes · Updated June 2026
Built for owners of the WH300 series system who want to handle their own annual maintenance without calling a plumber. This shop focuses on the core 1-year swap-out components and the specific tools needed to open tight canisters.
Curator's pick: Express Water Food Grade Silicone O-Ring Lubricant
Most people skip this, but it is the difference between a tool-free seal and a leaking housing that requires a breaker bar to open next year. Apply it to the O-ring every time to prevent the rubber from binding and flattening over time.
⚠ Worth knowing: These 5-micron filters are great for standard city water but will clog prematurely if your well has heavy, visible silt or sand. If you are cleaning out sediment every few weeks, you need a dedicated spin-down pre-filter before this system to protect these cartridges.
Spin-Down Sediment Pre-Filters for High-Silt Well WaterUnder-Sink Reverse Osmosis Systems for Drinking WaterPEX Tubing and Push-Connect Fittings for Main Line Installation
Express Water Whole House Water Filter Replacement Set 1 Year Supply
This filter replacement set provides a one-year supply of cartridges for the Express Water WH300 Series whole house filtration system. It is designed for homeowners who conduct annual maintenance to ensure consistent water quality. Replacing all filters annually helps maintain the system's efficiency and prolong its lifespan.
Complete 1-year replacement filter set
For Express Water WH300 Series systems
Includes sediment, GAC, and carbon block filters
Ensures consistent water filtration
Easy to follow replacement schedule
In this shop: This full replacement set is central to the Express Water WH300 Series Whole House Water Filters vibe, as it provides all the necessary filters for a complete annual system refresh.
This 5-micron sediment filter acts as the first stage in the Express Water WH300 water filtration system. It is suitable for households needing to remove larger particles from their water supply. The filter protects subsequent filters and plumbing from dirt, rust, and sand.
5-micron filtration
Removes sediment, dirt, rust, sand
First stage whole house filter
Standard 10-inch size cartridge
Extends life of finer filters
In this shop: As a critical first stage, this sediment filter fits the Express Water WH300 Series Whole House Water Filters vibe by ensuring basic particulate removal before finer filtration.
The GAC (Granular Activated Carbon) filter serves as the second stage in the Express Water WH300 series, specifically targeting chlorine and unpleasant odors. This filter is beneficial for improving the taste and smell of tap water throughout the house. It addresses common municipal water treatment byproducts.
Granular Activated Carbon (GAC)
Reduces chlorine taste and odor
Second stage whole house filter
Standard 10-inch cartridge
Improves water palatability
In this shop: This GAC filter aligns with the Express Water WH300 Series Whole House Water Filters vibe by significantly improving water aesthetics through effective chlorine and odor removal.
This ACB (Activated Carbon Block) filter functions as the third stage in the Express Water WH300 system, providing final polishing and further chemical reduction. It is designed for users seeking enhanced taste and comprehensive removal of remaining contaminants. The carbon block structure ensures efficient filtration down to specific micron levels.
Activated Carbon Block (ACB)
Final stage filtration
Reduces chemicals and improves taste
Standard 10-inch block design
Polishes drinking water quality
In this shop: The ACB carbon block filter enhances the Express Water WH300 Series Whole House Water Filters vibe by delivering a final stage of purification for superior water taste and clarity.
This specialized wrench is designed to loosen and tighten the large filter canisters of the Express Water WH300 series whole house filter system. It is a necessary tool for anyone performing DIY filter changes. The wrench ensures proper housing seal without overtightening.
Fits Express Water WH300 housings
Durable plastic construction
Facilitates filter changes
Prevents housing damage
Essential maintenance tool
In this shop: This housing wrench is an indispensable tool within the Express Water WH300 Series Whole House Water Filters vibe, simplifying the practical aspect of filter replacement.
This food-grade silicone O-ring lubricant is used to properly seal filter housing O-rings, preventing leaks after filter replacement. It is essential for maintaining the integrity of the water filtration system. Applying lubricant helps to prolong the life of O-rings and ensures a watertight seal.
Food-grade silicone lubricant
Seals whole house filter O-rings
Prevents water leaks
Extends O-ring lifespan
Small tube for multiple uses
In this shop: Crucial for preventing leaks, this O-ring lubricant fits the Express Water WH300 Series Whole House Water Filters vibe by supporting meticulous and effective system maintenance.
These replacement O-rings are designed for the Express Water whole house system filter housings and are often replaced during routine filter maintenance. They are suitable for homeowners who encounter worn or damaged O-rings. Replacing O-rings ensures a secure seal and prevents potential leaks.
Set of replacement O-rings
For Express Water whole house systems
Ensures watertight seal
Durable rubber material
Prevents leaks after service
In this shop: These replacement O-rings are a practical inclusion for the Express Water WH300 Series Whole House Water Filters vibe, addressing a common wear item during filter maintenance.
