O-Rings for Membrane Housing Cap (#227 Size) Part #143484

Description

** O-Ring for Membrane Housing Cap (#227) – Part #143484**

Keep your reverse osmosis (RO) membrane housing sealed and leak-free with this replacement O-ring designed specifically for the membrane housing cap. This small—but essential—seal helps maintain the watertight integrity of your RO system’s membrane housing, preventing leaks and ensuring consistent performance.

Key Features

• OEM Part #143484 O-ring for the membrane housing cap (#227 size) used in many residential RO systems.
• Creates a reliable watertight seal between the membrane housing cap and sump.
• Simple, durable elastomer design for easy installation and long service life.
• Inexpensive replacement part that helps prevent leaks and system downtime.
• Fits most standard membrane housings with 1/8″ ports that accept common RO membranes (e.g., 020-MVH90 housings).

Compatibility

This O-ring is designed to fit the cap of standard residential reverse osmosis membrane housings (cap seal groove), commonly used with Pentek/Pentair membrane housings and similar designs.

• Cap Seal O-Ring Size: #227 (Part #143484) for membrane housing caps.
• Works with membrane housings that use a replaceable cap O-ring (not sump O-rings).

⚠️ Note: This O-ring is specific for the cap seal. A separate O-ring (often Part #143483) is used for the sump end of membrane housings.

Why It’s Important

A quality O-ring is vital for maintaining a watertight seal on RO membrane housings. Over time, O-rings can become worn, flattened, cracked, or brittle due to pressure cycles and routine maintenance. Replacing the cap O-ring whenever the housing is serviced helps prevent leaks, protects your system components, and ensures proper pressure and function.

Installation Tips

• Always clean the sealing surfaces before installing a new O-ring.
• Lightly lubricate the O-ring with a food-grade silicone grease to help it seat correctly and last longer.
• Replace the O-ring anytime you open the membrane housing or observe leaks around the cap.