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Parts & Accessories for 3-Stage Whole House Systems
3/4″ Port · 10″ × 2.5″ Cartridges
Will these fit your system?
The parts below are made for MyWaterClub and Reverse Osmosis Revolution whole house systems with 3/4″ inlet and outlet ports, using standard 10″ × 2.5″ slim cartridges.
Filter cartridges are a universal size and fit most brands. Housings, O-rings and wrenches are not universal — thread pitch and housing diameter differ between manufacturers. If your system is another brand, please check with your manufacturer before ordering these parts.
Replacement filter cartridges
Wear parts
These wear out on a different schedule than your cartridges. Replacing them on time prevents the two most common problems — slow leaks at the housing seal, and cracked housings.
O-Ring / Gasket — 3/4″ Port Housings
Every 12–24 months
The seal between the housing and the cap. It compresses and hardens over time, and a tired O-ring is the usual cause of a slow drip. Replace it whenever you notice moisture at the seam — and lightly lubricate with food-grade silicone before refitting.
Housing Wrench
One per system
Fits dual and triple stage housings. Housings tighten under line pressure and are difficult to open by hand after a few months in service. Keep one near the system rather than hunting for it mid-change.
Replacement Filter Housing — 3/4″ Port
Every 3–4 years
Housings sit under constant line pressure and the plastic fatigues with age. Replace every 3–4 years regardless of appearance, and immediately at any sign of crazing, cracking, yellowing, or a leak that a new O-ring does not stop.
Clear housings let you see cartridge condition at a glance. Solid blue blocks light, which discourages algae growth if your system is anywhere daylight reaches.
Clear housing
Solid blue housing
Replacement schedule at a glance
| All three cartridges Change as a complete set |
Every 3–6 months |
| Housing O-rings | Every 12–24 months |
| Filter housings | Every 3–4 years |
Intervals are typical estimates. Your water chemistry, line pressure and household usage set the real schedule — change sooner if pressure drops, if taste or odor returns, or if the cartridges look visibly dark.
Not sure what you need?
Send us a photo of your system and we’ll tell you exactly which parts fit. Get in touch →
Please note: Filter life and reduction performance depend on your water chemistry, pressure and usage, so results vary from home to home. These products are not certified to treat water of unknown quality and are not a substitute for testing your water. Descriptions use general, qualified language and are not health claims.