Thetford RV Aqua-Magic Style II and Aqua-Magic Residence Seat and Cover Assembly - Bone 42179

The Thetford 42179 Seat and Cover Assembly is a genuine replacement part designed for Aqua-Magic Style II and Residence RV toilets. This seat and cover provide a comfortable, stable, and hygienic surface while maintaining the original style and fit of your RV toilet.

If your existing seat or cover is cracked, worn, or discolored, installing the 42179 assembly restores a secure, comfortable, and clean seating experience. Manufactured to Thetford’s high-quality standards, this assembly is durable, easy to install, and precisely engineered for a perfect fit with compatible toilet models.

Upgrade your RV bathroom with the Thetford 42179 Aqua-Magic Style II and Residence Seat and Cover Assembly — an essential component for comfort, hygiene, and maintaining the aesthetics and performance of your toilet.

Features & Benefits

• OEM replacement seat and lid designed for Style II & Residence toilets
• Bone-colored finish matches factory toilet appearance
• Comfortable ergonomic seat design for everyday RV use
• Durable, easy-to-clean construction resists staining and wear
• Reinforced hinge system maintains stable seating and smooth lid operation
• Direct bolt-on installation—no modifications required

Fits These Models

Compatible with:

• Thetford Aqua-Magic Style II (High & Low Profile)
• Thetford Aqua-Magic Residence permanent toilets

Ensures proper hinge alignment and perfect bowl fit for both series.

Common Issues Solved

Replacing with the 42179 seat assembly can fix:

• Cracked or broken toilet seats
• Stained, yellowed, or discolored seats and lids
• Loose hinges causing seat wobble
• Misaligned or poorly fitting aftermarket seats
• Uncomfortable or worn seating surfaces

Replaces / Also Known As

• Thetford 42179 Seat & Cover Assembly (Bone)
• Style II / Residence Toilet Seat Replacement – Bone
• RV Toilet Seat & Lid Kit
• OEM Bone Seat Assembly for Thetford Permanent Toilets

What’s Included

• Bone-colored toilet seat
• Matching toilet lid
• Integrated hinge components (mounting hardware typically reused)

Installation Overview

1. Remove the old seat by loosening and removing hinge bolts.
2. Clean the toilet rim and hinge mounting area.
3. Align the new seat’s hinges with the mounting holes.
4. Insert bolts, tighten evenly, and ensure proper alignment.
5. Test seat and lid movement to confirm smooth operation.

Average installation time: 5–10 minutes with basic tools.

Frequently Asked Questions

Q: Will this fit Style Lite or Style Plus toilets?
No. The 42179 fits Style II and Residence models only.

Q: Is this an OEM Thetford part?
Yes, it is the official factory replacement seat and lid for the specified models.

Q: Does it include mounting bolts?
Most installations reuse existing hardware, but replacement bolts may be purchased separately if needed.

Q: Is Bone the same as the original toilet color?
Yes — Bone is the standard off-white/cream tone used by Thetford.

Q: Can this be installed by the RV owner?
Yes. Installation is simple and requires only basic tools.