Need a Mobile RV Tech Near You?
Connect with certified mobile RV technicians for measurement, installation, or repair — directly through RVService.PRO.
RV Techs
You
Reviewed
Service Too
The Dometic MasterFlush 8740 is a powerful macerating toilet designed for RVs where traditional gravity drain systems aren't practical. This 12V model features advanced maceration technology that grinds and pumps waste through small-diameter discharge lines, making it ideal for tight installations, basement-mounted tanks, or complex plumbing layouts. RV owners choose the MasterFlush 8740 when they need reliable, odor-free waste management in challenging spaces.
Key Features
- Macerating pump grinds and pumps waste through 1" discharge hose for flexible installation
- 12V DC operation with low power draw—efficient for battery-powered RVs
- Bone-colored ceramic bowl matches standard RV bathroom aesthetics
- Integrated holding tank sensor compatibility for waste level monitoring
- Quiet operation with vibration-dampening design
- Easy-access service points for maintenance and troubleshooting
Technical Specifications
| Specification | Detail | |
|---|---|---|
| Part Number | 9600022433 | |
| Model | MasterFlush 8740 | |
| Power Supply | 12V DC | |
| Bowl Color | Bone | |
| Discharge Hose Size | 1 inch (25mm) | |
| Type | Macerating Toilet | |
| Manufacturer | Dometic |
Frequently Asked Questions
- What's the difference between a macerating toilet and a standard RV toilet?
- A standard gravity toilet relies on downward slope to drain into a holding tank. A macerating toilet has an internal pump that grinds waste and actively pumps it through small-diameter hoses. This gives you total flexibility in tank placement—it can be mounted above, below, or to the side of the toilet, even in tight basement locations where gravity drain won't work.
- Will the MasterFlush 8740 work with my existing RV plumbing?
- The MasterFlush 8740 connects to your existing 12V electrical system and discharges through a 1-inch hose to your holding tank. If you're replacing a gravity toilet, you'll need to cap off the old drain line and run new discharge plumbing to your tank. We recommend consulting your RV manual or a certified technician to confirm compatibility with your specific model and tank configuration.
- What kind of maintenance does a macerating toilet require?
- The MasterFlush 8740 requires minimal maintenance. Avoid flushing non-biodegradable items, feminine hygiene products, or excessive toilet paper. Periodically check discharge hose connections for leaks. If the pump becomes sluggish or won't operate, the internal impeller may need cleaning—this is a straightforward service task. Always consult the owner's manual for detailed maintenance schedules.
Why Choose Elkhart RV Parts
We specialize in hard-to-find Dometic replacement parts for RV owners who need the exact component for their specific model. Shipping directly from Elkhart, Indiana—the RV capital of the world—we stock genuine OEM Dometic parts and provide expert support to help you identify and install the right solution. When you need a MasterFlush 8740 that fits your rig, we've got it in stock and ready to ship.
| Brand | Dometic |
|---|---|
| Model | MasterFlush 8740 |
| Part number | 9600022433 |
| Product type | Macerating Toilet |
| Voltage | 12V |
| Color | Bone |
| Flush system | Grey Sea Water Flush |
| Features | Integrated Macerator Pump, Quiet Flush, Forceful Flush |
| Width | 23.5" |
| Depth | 15.5" |
| Height | 21.5" |
| Weight | 46 lbs |
| Application | RV and Marine |
| Condition | OEM |
| Category | Sanitation |
Need a Mobile RV Tech Near You?
Connect with certified mobile RV technicians for measurement, installation, or repair — directly through RVService.PRO.
RV Techs
You
Reviewed
Service Too
Factory-Fresh OEM Parts — the same brands installed in new RVs straight from Elkhart. Genuine, name-brand components made to order — never generic, never outdated. Sourced directly from the original RV manufacturers for perfect fit and factory-level quality.