O-Ring Kit 100238194 (90505)

Part Description:

The O-Ring Kit contains all essential replacement seals needed to maintain a watertight, leak-free system within your WaterBoss or AquaMaster softener. These durable rubber O-rings provide critical sealing at various connection points throughout the unit, ensuring proper pressure retention and reliable regeneration performance.

100241865 – Drain End Cap / Drive End Cap Large = Qty. 2 (previously 93808)

100242050 – Bypass Valve Body = Qty. 2 (previously 93838)

100241869 – Small End Cap = Qty. 2 (previously 90828)

100242033 – Brine Cap Housing = Qty. 2

100242032 – Piston = Qty. 2

100252699 – Brine Valve Housing = Qty. 2

100242034 – Injector Cap = Qty. 1

100037867 – Drive End Cap = Qty. 1 (previously 120010)

Function & Importance:

• Creates secure seals

• Prevents water leaks and pressure loss

• Maintains consistent operation and water flow

• Helps extend the life of internal components by protecting against moisture intrusion

What’s Included:

• A full set of OEM O-rings for common replacement point

• WaterBoss/AquaMaster/AquaMaster PRO factory specifications

Common Signs of Issues:

• Visible leaks around caps or valve body

• Drop in water pressure

• Unusual sounds or cycling issues during regeneration

• Cracked, flattened, or brittle O-rings during inspection

Compatible With:

• WaterBoss 700, 900, and 950

• AquaMaster 700, 900, and 950

• AquaMaster PRO 5000, 5100, and 5500

Installation Tips:

• Shut off water and depressurize system before opening any components

• Lubricate new O-rings with food-grade silicone grease for easier installation and a better seal

• Replace O-rings any time you remove key parts like the injector or drive cap

• Avoid overtightening screws or caps to prevent O-ring damage

Why It Matters:

Even a small leak can lead to big problems over time. The O-Ring Kit offers a simple, cost-effective way to refresh your system’s seals and restore its performance. Whether you're performing regular maintenance or repairing a specific issue, this kit is a must-have for any WaterBoss, AquaMaster, or AquaMaster PRO owner. Please call technical support first to ensure this is the correct part for the issue your softener may be experiencing 1-800-437-8993 (EST).