System Compatibility Matrix

Key Product Features

• Complete Replacement Kit – Includes the high-pressure vessel, integrated flush control mechanism, and the full handle assembly for a comprehensive rebuild.
• Compact Design Upgrade – Featuring an optimized shape that fits more easily into standard pressure-assist toilet tanks compared to bulkier older generations.
• Eco-Friendly 1.6 GPF – Provides maximum clearing power using only 1.6 gallons per flush, reducing household water consumption without sacrificing performance.
• Heavy-Duty Pressure Performance – Engineered to harness supply-line water pressure to compress trapped air, creating a high-velocity siphon jet action.
• No Batteries Required – Pure mechanical, pressure-driven operation ensures long-term reliability with zero electrical components to fail.

Technical Specifications

Installation & Step-by-Step Guide

A straightforward replacement project with included USA-based technical support:

1. Preparation: Shut off the water supply to the toilet. Flush the unit completely to relieve pressure, and disconnect the supply line.
2. Tank Removal: Carefully unbolt the china tank from the toilet bowl and lift it off. Drain any remaining water.
3. Swap System: Remove the old B8106/B8100 inner vessel assembly. Slide the new, compact B8106S System into the tank cavity.
4. Secure & Align: Mount the system using the provided hardware. Install the new handle assembly and connect it to the flush valve lever.
5. Reconnection: Set the tank back onto the bowl, tighten the tank-to-bowl bolts, reconnect the water supply line, and turn the water back on.
6. Testing: Allow the system to pressurize for 2-3 minutes, then perform several test flushes to check for leaks. (Video tutorials are available to guide you through the process!)

Why Upgrade to the B8106S?

When an older pressure-assisted system ages, it can leak air or fail to build proper pressure, resulting in weak flushes. Instead of buying a completely new toilet, the WDI B8106S Kit replaces the entire internal power cell. Backed by expert USA tech support, this official replacement restores original, factory-grade performance instantly and ensures your toilet operates flawlessly for years to come.