Thetford Water Valve Kit For Aqua Magic Residence and Style II Toilets 42049

The Thetford 42049 Water Valve Kit is a genuine replacement part designed for Aqua Magic Style II and Residence RV toilets. This kit controls the flow of water into the toilet bowl during flushing, ensuring efficient rinsing, consistent performance, and leak-free operation.

If your Style II or Residence toilet is experiencing weak flushing, inconsistent water flow, or leaks, installing the 42049 water valve kit restores reliable performance. Manufactured to Thetford’s high-quality standards, the kit is durable, easy to install, and engineered for a precise fit with compatible toilet models.

Maintain your RV toilet’s hygiene, efficiency, and reliability with the Thetford 42049 Water Valve Kit — an essential component for smooth and dependable flushing in Aqua Magic Style II and Residence toilets.

Features & Benefits

• Genuine water valve designed specifically for Aqua-Magic Style II and Residence toilets
• Restores proper water flow and bowl fill rate
• Resolves running water, dripping valves, and inconsistent flushing
• Includes all essential internal components for a full valve rebuild
• Built from durable, RV-rated materials to withstand vibration, pressure, and mineral buildup
• Cost-effective solution compared to replacing the entire toilet

Fits These Models

Compatible with:

• Thetford Aqua-Magic Style II
• Thetford Aqua-Magic Residence

Not compatible with Style Lite, Style Plus, or other Aqua-Magic models.

Common Issues Solved

Replacing the 42049 valve kit can fix:

• Water continuously running after flush
• Water leaking from valve area or base
• Weak bowl fill or low water pressure during flush
• Intermittent flush performance
• Valve sticking or failing to open/close properly

Replaces / Also Known As

• Thetford 42049 Water Valve
• Style II / Residence Water Valve Replacement
• RV Toilet Water Inlet & Flush Valve
• OEM Water Control Valve Kit

What’s Included

• Water valve cartridge
• Water inlet seal
• Drive-arm seal
• Return spring
• Retainer
• Closet-flange seal
• Installation instructions

Installation Overview

1. Shut off the RV water supply and flush to empty the bowl.
2. Access the water valve (toilet may need to be removed depending on layout).
3. Disconnect and remove the old valve assembly.
4. Install the new valve cartridge, seals, and spring according to instructions.
5. Reinstall the toilet (if removed), reconnect the water line, and restore water pressure.
6. Test for proper flushing, bowl fill, and leak-free operation.

Typical installation time: 20–30 minutes using basic hand tools.

Frequently Asked Questions

Q: Will this kit fit Style Lite or Style Plus?
No. The 42049 kit is only for Style II and Residence toilets.

Q: Will it stop my toilet from continuously running?
Yes. A worn or damaged valve is the most common cause of a continuously running toilet.

Q: Is this an OEM Thetford part?
Yes, the 42049 is a genuine factory replacement.

Q: Do I need special tools for installation?
No. Standard household tools are all that’s needed.

Q: How long does a water valve typically last?
It varies by water quality and usage, but many RV owners replace them every few years when symptoms appear.