Description
Genuine Dometic Standard Seat & Cover for MasterFlush & VacuFlush Moderno Series Toilets
Refresh your Dometic Moderno toilet with this genuine OEM soft-close seat and cover in white. Designed to match the sleek, residential styling of the Moderno line, this seat delivers a quiet, secure close every time — no slamming, no rattling. If your existing seat is cracked, stained, loose, or the hinge has failed, this direct replacement restores both comfort and the clean, modern look of your toilet. Mounting hardware is included for a straightforward, no-guesswork installation.
Compatible With:
- Dometic MasterFlush 8540 (Moderno macerator, standard/non-bidet)
- Dometic MasterFlush 8541 (Moderno macerator, bidet configuration — as a standard seat replacement)
- Dometic VacuFlush 4500 Series (Moderno-style vacuum toilet)
What's Included:
- Seat and cover assembly
- Mounting hardware
Key Features:
- Genuine Dometic OEM replacement part
- Soft, silent slow-close hinge action
- White finish to match Moderno's contemporary styling
- Includes all mounting hardware for easy installation
- Compatible with both 12V and 24V toilet systems
- Dimensions: 17-1/4" x 14-1/8" (measured underside, front tip to back of seat)
How to Find Your Model Number
Before ordering, check the data sticker on the base or rear of your toilet — it will list a model number such as 8540, 8541, or a VacuFlush 4500-series number. This confirms your toilet uses the Moderno-style seat mount. If you're unsure whether you have a bidet-configured unit and want to keep bidet function, be sure you're ordering this standard seat and not the bidet version (part #385312156). If you can't locate the sticker, contact us with a photo of your toilet's base and we'll help confirm fitment.
Frequently Asked Questions
Will this seat work on my 8541 bidet-configured toilet?
Yes — this standard seat physically fits the 8541, but it does not include bidet functionality. If you want to retain bidet function, order the Bidet Slow-Close Seat (part #385312156) instead.
What's the difference between this and the bidet seat (385312156)?
This is the standard soft-close seat and cover with no bidet function — ideal for 8540 owners or anyone replacing a worn seat without needing a bidet upgrade. Part #385312156 is the bidet-integrated version.
Does this include mounting hardware?
Yes — mounting hardware is included, so no separate purchase is needed for a standard installation.
Will this fit my VacuFlush 4500 series toilet?
Yes — the VacuFlush 4500 series shares the same Moderno-style seat mount as the MasterFlush 8540/8541.
Is this compatible with 12V and 24V systems?
Yes — the seat itself is not voltage-dependent, so it fits both 12V and 24V Moderno toilets.
How do I measure to confirm this will fit my current seat?
Lift your existing seat and measure the underside from the front tip to the back — this seat measures 17-1/4" x 14-1/8". If your current seat matches these dimensions, this is the correct replacement.
You May Also Need
- Dometic Moderno Bidet Slow-Close Seat (part #385312156) — if upgrading to bidet function
- Dometic 8500 Series Water Valve/Vacuum Breaker
- Dometic Moderno Tall Series Bowl Kit
Special Order – Estimated 7–14 Business Day Lead Time
Please note: This is a special order item.
- Estimated lead time: 7–14 business days
- Lead times may vary based on Dometic manufacturing and availability
- Special order items are non-cancelable and non-returnable once the order has been placed with the manufacturer, except in the case of a warranty issue or shipping damage
- Orders containing both in-stock and special-order items may ship separately or be held until all items are available
