Dometic MasterFlush 7640: Why It's Still One of the Best RV Toilets Ever Made (Limited Bone Color Stock Remaining)

For many RV owners, the Dometic MasterFlush 7640 represents the perfect combination of residential comfort and reliable waste management. Even though this premium toilet has been discontinued, it remains one of the most sought-after macerating toilets ever installed in luxury motorhomes and fifth wheels.

If you're fortunate enough to own a coach equipped with a MasterFlush 7640, you already know why owners continue searching for this model years after production ended.

What Makes the MasterFlush 7640 Unique?

Unlike traditional gravity-flush RV toilets, the MasterFlush 7640 uses a powerful integrated macerator pump that grinds waste before sending it to the holding tank. This design offers several advantages:

• Smooth, clog-resistant operation
• Ability to move waste through smaller plumbing lines
• Cleaner waste evacuation
• Residential-style flushing performance
• More flexible plumbing layouts for RV manufacturers

One feature that truly sets the 7640 apart is its foot pedal flush.

The Convenience of a True Foot Pedal Flush

Most macerating RV toilets rely on electronic wall-mounted buttons or touch panels. The MasterFlush 7640 is different.

Its foot-operated flush pedal allows you to:

• Flush hands-free
• Control water usage naturally
• Operate the toilet just like many traditional residential fixtures
• Enjoy familiar operation without searching for wall controls

For many owners, this simple pedal is the reason they refuse to replace their 7640 with another model.

Residential Comfort

The MasterFlush 7640 wasn't designed as a basic RV toilet—it was built as a luxury fixture.

Features include:

• Comfortable chair-height seating
• Full-size residential seat
• Durable vitreous china (porcelain) bowl
• Quiet flushing operation
• Powerful macerating system
• Attractive modern styling
• Easy-to-clean glazed surface

Combined, these features make the 7640 feel much closer to a home toilet than a typical RV fixture.

Why Was the MasterFlush 7640 Discontinued?

Like many RV products, the 7640 eventually reached the end of its production life as Dometic introduced newer sanitation systems.

Although discontinued, thousands remain in service across luxury motorhomes, diesel pushers, and premium fifth wheels.

That means replacement parts—and complete replacement toilets—continue to be in demand.

Limited Inventory Still Available

Complete MasterFlush 7640 toilets are becoming increasingly difficult to find.

At the time of writing, Dometic has very limited inventory remaining of the Bone color version.

Once these units are gone, obtaining a brand-new 7640 may become extremely difficult, leaving owners to search the used market or convert to a different toilet platform.

If you prefer keeping your RV original or simply enjoy the convenience of the pedal-operated macerating system, now is an excellent time to secure a replacement while inventory remains.

Need Parts Instead?

Not every problem requires replacing the entire toilet.

Many common issues can be repaired by replacing individual components such as:

• Flush control panel
• Water valve module
• Macerator motor
• Bowl seals
• Mounting hardware
• Flush pedal components
• Electrical parts

Repairing your existing 7640 is often significantly less expensive than converting your RV to a different toilet model.

Is There a Direct Replacement?

Because the 7640 combines a macerator with a foot pedal flush, there are no direct replacements available today.

Many current macerating toilets use electronic wall controls instead of a pedal, making the 7640 a unique design that many RV owners prefer.

If you're considering replacing your existing 7640, it's important to verify plumbing, electrical connections, mounting configuration, and available replacement options before purchasing.

Why Buy from RVToiletParts.com?

At RVToiletParts.com, we specialize exclusively in RV toilets and replacement parts.

When you contact us, you're speaking with people who work with Dometic, Thetford, and Tecma toilets every day—not a general RV parts warehouse.

Whether you need a complete MasterFlush 7640 toilet, replacement parts, or help identifying the correct component, we're here to help you keep your RV bathroom working like new.

Don't Wait

The Dometic MasterFlush 7640 has earned a loyal following for its unique combination of pedal-flush convenience, residential comfort, and dependable macerating performance.

With only a limited number of Bone-colored units remaining, this may be one of the last opportunities to purchase a brand-new 7640 before they're gone for good.

If you've been considering replacing your aging toilet—or keeping a spare on hand for the future—now is the time.