The provided manual describes the Sealand MasterFlush™ Toilets, specifically the 8900 and 8600 Series, manufactured by Dometic Group. These are macerator toilets designed for marine applications, providing an electric-flush system to process waste.
Function Description
The Sealand MasterFlush toilet is an electric-flush toilet that macerates waste and pumps it to a holding tank or other effluent storage/disposal system. It operates via a wall-mounted flush switch, allowing users to add water to the bowl (before use or flushing) and to flush the toilet by pushing a button. The Dometic flush switch panel includes indicator lights for power activation and holding tank status. A key safety feature is the automatic "full tank" shut-down, which prevents overfilling of the holding tank when connected to a level indication system, thereby preventing potential damage to the boat.
Important Technical Specifications
Materials:
- Toilet: Vitreous ceramic
- Macerator pump body: Glass-filled polypropylene
- Control module housing: ABS
- Dometic switch panel frame: ABS
- Dometic switch panel: Polycarbonate resin
Minimum System Requirements:
- Electrical:
- Circuit breaker: 20 amps/12 V DC; 15 amps/24 V DC
- Wiring: 12 gauge (up to 20 ft./6.1 m from breaker)
- Water Supply:
- Fitting: 0.5 in. NPT
- Flow rate: 2.0 gpm/7.6 lpm minimum
- Discharge:
- Inside diameter: 1.5 in./38 mm or 1 in./25 mm
Dimensions (refer to page 2, figure 2 for visual representation):
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Toilet models 8970, 8979, 8980, 8989 (standard height):
- A: 18.125 in. / 460 mm
- B: 14.75 in. / 375 mm
- C: 18.625 in. / 473 mm
- D (seat height): 17 in. / 432 mm
- E: 15.75 in. / 400 mm
- F (seat lid up): 33.5 in. / 851 mm
-
Toilet models 8930, 8939, 8940, 8949 (low-profile height):
- A: 14.75 in. / 375 mm
- B: 14.75 in. / 375 mm
- C: 18.25 in. / 464 mm
- D (seat height): 13.625 in. / 346 mm
- E: 14.875 in. / 378 mm
- F (seat lid up): 30.25 in. / 768 mm
-
Models 8670, 8679, 8680, 8689 (standard height):
- A: 18 in. / 457 mm
- B: 14.75 in. / 375 mm
- C: 19.75 in. / 502 mm
- D (seat height): 17 in. / 432 mm
- E: 16 in. / 406 mm
- F (seat lid up): 33.5 in. / 851 mm
-
Models 8630, 8639, 8640, 8649 (low-profile height):
- A: 15 in. / 381 mm
- B: 14.75 in. / 375 mm
- C: 19.75 in. / 502 mm
- D (seat height): 14 in. / 356 mm
- E: 15.375 in. / 391 mm
- F (seat lid up): 30.5 in. / 775 mm
Installation Versatility: The powerful macerator pump allows the toilet to be located up to 98 ft. (30 m) away and 9.8 ft. (3 m) below the holding tank or other discharge line destination.
Usage Features
- Convenient Electronic Flush: Users can add water to the bowl or flush with a simple touch of a button on the Dometic flush switch/status panel (fig. 3, page 6).
- Two Water Consumption Settings:
- Normal flush: Uses 0.85 gal. (3.2 liters) per flush and adds water to the bowl after flushing.
- Dry Bowl flush: Uses only 0.45 gal. (1.7 liters) per flush and does not add water to the bowl. The flush mode can be changed by pressing the "Flush" switch for about five seconds until the "Power On" light flashes.
- Indicator Lights:
- "Power On" indicator (fig. 3 3, page 6): A steady green light indicates electrical power to the toilet is activated. A momentary flashing green light indicates a change in flush mode.
- "Full Tank" indicator (fig. 3 4, page 6): A red light illuminates when the holding tank is full, signaling that it needs to be pumped out. When this light is on, electrical power to the toilet automatically shuts off to prevent overfilling.
- Bidet Operation (on models with integrated bidet only):
- Turn on the bidet faucet by turning the handle away from the toilet (fig. 4, page 7).
- Adjust water temperature by turning the handle up for warm water and down for cool water (fig. 5, page 7).
- Use the electronic "Flush" switch to clear the toilet bowl during and after bidet use.
- Safety Warnings:
- Hazard of Flooding: If connected to through-the-hull fittings, seacocks must be closed when the toilet is not in use. If using fresh water from a shoreside municipal system, connections must be disconnected if the boat is unattended. All electrical power must be turned off and seacocks closed before any work on the product.
- Overfilling Holding Tank: Dometic recommends using the "full" tank shut-down relay in the toilet's electronic control module, which can be triggered by an optional Dometic DTM01C or DTM04 tank monitor system, to prevent damage from overfilling.
- Foreign Objects: Only water, bodily wastes, and rapid-dissolving toilet tissue should be flushed. Avoid wet wipes, sanitary napkins, condoms, diapers, paper cups, cotton swabs, food, hair, oils, or solvents to prevent clogging or damage.
Maintenance Features
Cleaning the Toilet:
- Use SeaLand® Toilet Bowl Cleaner or other non-abrasive bathroom and toilet bowl cleaners to maintain appearance.
- Caution: Do not use abrasive cleaners, caustic chemicals, lubricants, or cleaners containing alcohols or petroleum distillates, as these can damage internal seals.
Routine Maintenance:
- Monthly:
- Inspect the toilet, plumbing, and electrical connections.
- Open and close all plumbing valves, including seacocks.
- Check in-line water filters and vented loops for blockages.
- Yearly:
- Check the water valve filter. Also check if water flow becomes insufficient.
During Extended Periods of Non-Use (more than two weeks, especially in hot weather):
- Flush the toilet in "Normal" mode and add 4 oz. (118 ml) of liquid biodegradable laundry detergent (without bleach or environmentally harmful substances). If using seawater for flushing, shut off the seawater pump and add fresh water directly into the bowl during the flush cycle.
- Flush the toilet with water at least five times.
- Turn off the water supply to the toilet.
- Flush the toilet without water three times to minimize remaining water in the macerator pump.
- Turn off power to the toilet.
Winterizing (if exposed to freezing temperatures):
The manual also provides a troubleshooting guide for common issues such as slow emptying, loud pump noise, flush cycle not activating, insufficient water entry, and insufficient bidet water flow, along with possible causes and service instructions. Warranty information is provided for North America, the Rest of the World, and Europe, detailing one-year and five-year limited warranties for specific components, and exclusions for damages due to improper installation or misuse. Customer service contact information is also included.
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