385311652 & 385311658 RV Toilet Seal Kit for Dometic 300 Series
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Replaces Part Numbers
385311652 & 385311658 RV Toilet Seal Kit for Dometic 300 Series
Key Features
- Includes 1 floor flange seal and 1 flush ball seal.
- Includes 2 fixing bolts, 2 fixing nuts, 2 nut spacers, and 2 bolt caps.
- Replaces the base seal and flush ball seal to help restore a tight toilet seal.
- Flexible, wear-resistant rubber construction resists drying, cracking, and deformation through repeated compression, summer heat, and winter travel.
- The included bolts, nuts, spacers, and caps provide a secure hold for the toilet base.
Replaces / Cross-Reference Part Numbers
- 385311652 — base seal and floor flange seal
- 385311658 — flush ball seal
Compatibility & Fitment
- Fits Dometic 300, 310, and 320 Series RV toilets.
- Does not fit Dometic 210 or 510 models, or models outside the listed series.
- Compare the existing seals, size, and part numbers before ordering. Seals from other series may look similar but are not interchangeable.
When to Replace
- Water pools around the toilet base.
- Bowl water drains away between uses.
- Odors remain inside the RV after flushing.
- The foot pedal feels soft.
- A worn base seal or flush ball seal no longer maintains a tight joint, allowing bowl water or odors to escape.
Installation Tips
- Shut off the water supply, press the foot pedal, and remove the old gasket.
- Clean debris from the toilet rim and flush ball surface.
- Apply silicone grease to the bottom and groove of the new seal.
- Press the seal into place with the “THIS SIDE UP” marking facing upward.
- Turn the water back on and check the toilet base and seal area for drips.
Installation uses basic hand tools and can typically be completed in minutes. Lifetime protection is provided for defects or issues with the product.
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Compatible Models
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FAQs
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Common Model Number Locations
Need help finding your model number? Select your appliance or lawn equipment below for location diagrams
- Above the refrigerant valves on the back of the air conditioner
- On the side of the unit near the run capacitor or electrical lines that go into your home
- On either side of the exterior
- On the back of the unit where the power cord is located
- In the cool air exhaust port
- To the left of the fan opening, on the weather barrier
- Below the control panel
- On either side of the exterior
- Behind the front grill on the frame
- On the door frame
- On the inside of the tub wall
- Behind the control panel
- On the door
- Inside the edge of the unit
- On the back exterior
- On the door
- On the side of hose storage
- Inside the edge of the unit
- On inside of the door
- On the door frame
- On the back exterior of the unit
- On the exterior side of the unit
- Behind the control panel
- On the inside of the door
- On the door frame
- On the exterior side of the unit
- At the top of the unit
- On the inside of the dryer door
- On the door frame
- Under the washer lid
- On either side of the exterior
- On the back exterior of the unit
- On the door frame
- On the exterior side of the unit
- On interior wall
- On the control panel
- On side of door
- On the right-hand side of the vent, under the control panel
- On the interior wall of the microwave (microwave model number only)
- On the door frame
- On the rear panel
- On the exterior back of the unit
- Inside the top part of the vent duct (in down-draft models)
- Underneath a burner
- Underneath a knob
- Underneath the cooktop (lift-up style)
- Bottom of cooktop
- On an exterior wall
- On an inside wall
- On the door frame
- On the right-hand side of the vent, under the control panel
- On the interior wall of the microwave (microwave model number only)
- On the door frame
- On the rear panel
- Behind the control panel
- Under the front surface unit
- On the door frame
- Interior side panel
- On the exterior of the unit
- On the inside of the lower storage compartment wall
- On top the hood
- Behind the filter
- Under the hood
- On the inside of the door
- On the exterior back of the unit
- Inside on the rear wall
- On the exterior side of the unit
- On door jamb
- On rear of frame
- Behind front panel
- On ceiling of refrigerator
- On interior wall
- On the inside of the door
- Behind crisper drawer
- Behind kickplate
- On ceiling of refrigerator
- On interior wall
- On door frame
- Behind crisper drawer
- Behind kickplate
- On ceiling of freezer
- On interior wall
- On the inside of the door
- Behind kickplate
- On the exterior side of the unit
- On inside of the door
- On the door frame
- On the back exterior of the unit
- On the front exterior of the unit
- On the control panel
- Inside the lid
- Under the lid on the frame
- On the exterior of the unit
- At the top of the unit
- On the inside of the dryer door
- On the door frame
- Under the washer lid
- On either side of the exterior
- On the top center of heater
- On the exterior of the unit
- On the starter housing
- On the side of the housing, behind the top handle
- On the side of the motor housing
- Near the rear grip
- On the top or sides of the engine housing
- On the gas tank
- On the recoil housing
- On the handle bars
- On top of the engine cover
- Near discharge chute, often behind chute flaps
- On rear of the deck, behind the engine
- Dash panel
- Back of mower/rear bumper
- Underside of the seat
- Lower side of hood, near engine
- Frame (beneath the seat, footrest)
- Mower deck
- Underside of the seat
- Frame beneath or near the seat
- Back of mower/rear bumper
- Lower left side between gas tank and mower deck
- Under the foot plate
- On the rear of the blower
- Inside of vacuum canister
- Side of the motor housing
- On the rear base of the vacuum
- On the bottom of the belly of the vacuum
- On the frame near the engine
- On the side of the auger housing
- On the lower rear of the snow blower between wheels
- On the side of the motor housing
- On the shaft
Select an appliance to see where its model number is located.
