Gravity-flush toilet
EN
Instruction manual
310 and 320 Series
Gravity-Flush
Toilets
1
IF SERVICE OF THIS TOILET IS EVER REQUIRED,
READ THIS BEFORE SERVICING PRODUCT.
DO NOT REMOVE TOILET FROM VEHICLE.
STOP
TOILET DOES NOT NEED TO BE REMOVED FROM VEHICLE FOR BASIC REPAIRS (if necessary)
Flush ball seal – Dometic’s
revolutionary ball seal allows future
replacement of worn or damaged
ball seals without requiring tools or
toilet disassembly. The ball seal can
be changed in just a few minutes
without removing the toilet from the
oor. Detailed replacement instructions are included with replacement
ball seal kits.
DO NOT SEPARATE CERAMIC BOWL FROM PLASTIC BASE.
DO NOT REMOVE FOOT PEDAL FROM BASE.
DISASSEMBLY OF COMPONENTS MAY VOID WARRANTY.
SEE MANUAL AND REPLACEMENT KITS FOR SERVICE INFORMATION.
Call Customer Service: 1-800-321-9886 (8 a.m. – 5 p.m. ET)
Snap-in water valve cartridge –
Allows easy replacement of worn
or damaged water valves. In cold
climates, be sure to follow winterizing procedure in owner’s manual
to help avoid water valve failure.
Refer to replacement instructions
in new water valve kit prior to
removal or installation of water
valve assembly.
Dometic Corporation
Sanitation Division
Factory-sealed bowl-to-base assembly – Unlike other Dometic foot-
pedal toilets, the bowl and base of
310 and 320 series toilets should
not be separated for any reason.
Each Dometic toilet is 100% factory-tested to assure a watertight seal in the toilet bowl before
it is shipped.
After installation at the RV or other vehicle factory, the entire toilet and waste tank system is oodtested for leaks by lling the system with water to the rim of the toilet bowl. This process requires
holding the ush ball open with a device which may temporarily distort the ball seal from its original
shape and, as a result, cause the seal to leak water into the waste tank during normal use. The ball
seal may need to be reconditioned to its original shape.
IF NEW TOILET DOES NOT HOLD WATER IN BOWL…
Please follow the procedures below before attempting to replace the seal.
1. Hold ush ball in full open position by pressing on
pedal.
2. Using nger, apply moderate downward pressure
around edge of ball seal.
3. Close ush ball.
4. Keeping ush ball closed, pour one quart of
hot tap water into toilet bowl.
5. Let water cool completely.
6. Check for leak.
If leak still persists, ush ball seal should be
replaced. Follow instructions provided with
replacement seal kit.
2
Domet ic Gravity-Flush Toilet
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Notes on using the man ual
Dometi c Gravity-Flush Toil et
Table of contents
1 Notes on using the manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 6
5 Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
6 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 - 7
7 Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
8 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
9 Winterization and storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 9
10 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
11 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
12 Customer service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
EN
1 Notes on using the manual
Caution!
Safety Instruction: Failure to observe this instruction can cause material damage and impair
the function of the device.
Note
Supplementary information for operating the device.
g.
A, page 3 : This refers to an element in an illustration. In this example, item A in
1
gure 1 on page 3.
2 General safety instructions
The manufacturer will not be held liable for claims for damage resulting from the following:
• Faulty installation or connection
• Damage to the unit from mechanical inuences, misuse or abuse
• Alterations to the unit without express written permission from the manufacturer
• Use for purposes other than those described in this manual
2.1 Warnings
The following statements must be read and understood before installing, servicing and/or
operating this product. Modication of this product may result in property damage.
1. Do not use chlorine or caustic chemicals, such as laundry bleach or drain-opening types, in the
system. These products damage the seals in toilets and other plumbing valves.
2. Do not permit foreign objects (paper towels, paper cups, diapers, sanitary napkins, etc.) to be
ushed through the toilet.
3. Mechanical seal toilets are designed to only discharge directly into a holding tank. Horizontal
pipe runs as found in conventional residential or commercial plumbing systems cannot be
accommodated.
4. Toilet bowl must be regularly cleaned and winterized according to “Cleaning” and “Winterization
and storage” procedures on pages 8-9, or your warranty coverage may be voided.
4
Dometi c Gravity-Flush Toil et Intend ed use / Specifi cations
3 Intended use
Dometic 310 and 320 series toilets provide lightweight, residential-size toilets for installation directly
above a holding tank.
3.1 Benefits
PowerFlush technology. Improved pressurized rim ow creates high-speed, full bowl rinsing.
Premium user comfort. Full-size seat, deep bowl and 18-in. (457 mm) seat height result in greater
homelike performance.
Easy installation. Two-bolt design ts most existing toilet oor anges – great for new or replacement installations. Just place on oor ange, tighten bolts, connect water, and it’s ready.
Compact design. Small footprint with 10-inch or 11-inch (254 or 279 mm) rough-in.
Ergonomically enhanced pedal operation. Lower pedal height for easier use; “one-direction” action
to add water and ush.
4 Specifications
4.1 Materials
Materials
Toilet bowl: vitreous ceramic
Model 310 toilet seat: polypropylene
Model 320 toilet seat: wood
Flush ball seal: nitrile butyl rubber
Base, foot pedal, water valve: polypropylene
Water valve: polypropylene
Vacuum breaker: ABS/polypropylene
Floor seal: nitrile rubber, foam
4.2 Minimum installation requirements
Fitting 0.5 in. NPT
Water
Supply
Discharge Floor ange 3 in./76 mm ID, 1/4-7/16 in. (6-11 mm) thick
* Water supply that exceeds 5.0 gpm / 18.9 lpm may require a ow restrictor at toilet inlet.
Specications subject to change without notice.
Flow rate
Static pressure 30-100 PSI / 206.8-689.5 kPa
4.3 Toilet dimensions (g.
Ref.
Dimensions
Model 310 Model 320
A 20 in. / 508 mm 20 in. / 508 mm
B 15 in. / 381 mm 15 in. / 381 mm
C 19 in. / 483 mm 22 in. / 559 mm
D 18 in. / 457 mm - seat height 18 in. / 457 mm - seat height
E 14.75 in. / 375 mm 16 in. / 406 mm
F 33 in. / 838 mm - seat lid up 33 in. / 838 mm - seat lid up
3.0-5.0* gpm / 11.4-18.9 lpm recommended
2.0 gpm / 9.5 lpm minimum
, page 3)
2
5
Dometi c Gravity-Flush Toil etSpecif ications / Insta llation
4.4 Rough-in dimensions (g.
Ref.
5 Components (g.
Ref. Description
Dimensions/Description
Model 310 Model 320
A 10 in. / 254 mm 11 in. / 279 mm
B Floor ange
C 11 in. / 279 mm 11 in. / 279 mm
D 11 in. / 279 mm 11 in. / 279 mm
E Left wall
F Back wall
G Right wall
1
A Toilet seat
B Flush ball seal
C Toilet bowl
D Toilet base
E Flush pedal
F Floor ange seal
, page 3)
3
, page 3)
Ref. Description
G Vacuum breaker cover
H Vacuum breaker
I Water valve
J Floor mounting hardware kit
Refer to complete parts list (available online at
www.dometic.com) for additional information.
6 Installation
Note
Be sure foot pedal, when pressed, touches same at surface on which toilet is installed.
Note
Be sure to follow recommended installation requirements in section 4.2 of this manual.
6.1 Tools required
• pliers or adjustable wrench
• 7/16-in. / 11 mm wrench
6
Dometi c Gravity-Flush Toil et Instal lation / Operati on
6.2 Toilet installation
1. To replace an older toilet, turn off water supply to toilet. Remove and drain water supply line.
Remove toilet hold-down bolts/screws. Remove toilet from oor. Remove and discard old oor
ange seal and hold-down bolts. Verify center of oor ange is at least 10 inches / 254 mm (for
model 310) or 11 inches / 279 mm (for model 320) from back wall (g.
top surface of oor ange is clean and free of any debris or sealant.
2. If installing a new oor ange, make certain that toilet mounting holes are located at the correct
angle (g.
(8 is preferred). Insert two supplied T-bolts into slots in oor ange (g. 4 , page 3).
3. Verify that oor ange seal is installed on base of toilet (g.
over oor ange. Align holes in toilet base with T-bolts as toilet is lowered onto oor ange.
Toilet must be aligned so that outlet of base ts inside of oor ange outlet hole.
4. Install oor mounting nuts and washers onto T-bolts. Carefully torque nuts to 30-40 inchpounds. DO NOT OVERTIGHTEN. Alternate between sides when tightening to prevent
distortion of base. When tight, base should be securely attached and at against oor.
Attach bolt covers onto nuts. (Fig.
5. If toilet is being installed in a shower stall, apply a bead of caulk around base of toilet to prevent
water seepage under base.
6. Connect water supply line and torque connection to 30-40 inch-pounds.
DO NOT OVERTIGHTEN. (Fig.
7. Turn on water supply line. Flush toilet several times and check for leaks.
B, page 3). Floor ange must be secured to oor with a minimum of four screws
3
A, page 3). Carefully set toilet
5
Note
Entire toilet base does not rest completely on oor yet. Floor seal must be compressed in
following steps.
B, page 3)
5
C, page 3)
5
A, page 3). Make sure
3
7 Operation
7.1 Add water to bowl
To add water to the toilet, press the ush pedal
part way down. Water ows into the bowl while
ush ball remains closed. If the ush ball moves,
let up on the pedal slightly. Adding water to an
empty bowl helps prevent holding tank odors from
entering the living space. Adding water is recommended prior to ushing solids and toilet paper.
7.2 Flush toilet
To ush, press pedal down until it contacts the
oor. Release pedal after complete ush.
• When ushing liquids, press the pedal for 1-2 seconds.
• When ushing solids, press pedal until contents are rinsed from bowl. Flushing longer than
necessary will cause holding tank to ll too quickly.
A small amount of water will collect in the bowl after a ush to create an airtight seal.
Note
To prevent holding tank odors from entering the living space, make sure a small amount of
water remains in the toilet bowl.
Flush directions are located under
toilet seat lid.
7
Dometi c Gravity-Flush Toil etCleani ng / Winterizati on and storage
8 Cleaning
8.1 Routine toilet cleaning
For routine cleaning, use SeaLand® Toilet Bowl Cleaner. If you cannot nd it in your area, contact
Dometic for your nearest dealer. If the cleaner is not available, use most any non-abrasive bathroom
and toilet bowl cleaner. Please follow label instructions.
8.2 Flush ball/seal cleaning
After a period of time, mineral deposits from hard water may
build up on the ush ball or seal, resulting in a slow water
leak. To prevent this, periodically clean the ush ball and seal.
1. Remove minor debris from the ush ball and seal by
slowly pressing and releasing the ush pedal several
times. This will loosen and rinse debris from the surfaces.
Repeat several times for stubborn buildup.
2. If step 1 does not fully clean the ball and seal, clean with
a soft bristle brush and SeaLand toilet bowl cleaner. Fully
clean the top of the ush ball and under the seal where it
contacts the ush ball. After cleaning underside of seal, apply light downward pressure to top of
seal while brushing around full perimeter of seal.
3. If this does not correct a leaking seal, it may require replacement.
9 Winterization and storage
When a Dometic toilet is stored for long periods of time or may be exposed to temperatures below
freezing, the toilet must be winterized or stored according to one of the following procedures.
Caution
This toilet is not intended for use when exposed to temperatures below freezing.
Caution
Never use automotive-type antifreeze (ethylene glycol) in freshwater systems.
Note
Use nontoxic antifreeze (propylene glycol) designated for potable water systems.
(See vehicle owner’s manual.)
Storage options
Non-toxic Antifreeze Winterization (recommended method)
1. Pour antifreeze in potable water tank according to instructions from antifreeze manufacturer.
2. Flush toilet several times until antifreeze has owed completely through toilet. For toilets with
hand sprayer, the hand sprayer must be turned on to assure antifreeze is cycled through the
sprayer.
Drain Water from Toilet
1. Turn off water supply to toilet.
2. Remove water supply line from water valve.
3. Place a small container under water valve inlet to catch draining water.
(continued on next page)
8
Dometi c Gravity-Flush Toil et Winter ization and stor age
4. Press ush pedal and allow water to completely drain from water valve and vacuum breaker.
5. Leave water line disconnected until threat of freezing temperature is past.
Note
Never leave vehicle or premises unoccupied for extended periods of time with municipal
water supply or onboard water pump turned on when there is a possibility of freezing
temperature.
IMPORTANT:
Toilet warranty does not cover freeze-damaged water valve
The Dometic 310 and 320 series toilet warranty expressly excludes coverage for any damages to
the toilet or vehicle that may occur as a result of improper winterization of the toilet. An indicator of
improper winterization is freeze damage to the water valve which results in leaks.
Dometic 310 and 320 series toilet water valves
exceed maximum water pressure as dened by
North American plumbing code agencies. However,
if trapped water freezes in piping that supplies water
to the toilet, it expands and creates extremely high
pressure that can damage the valve (see photo).
To avoid this, winterize the toilet as described in
this manual. If freeze-damage occurs as a result of
improper winterization, replace the water valve with
a 300/310/320 toilet water valve kit, part number
385311641. IF WATER VALVE IS RETURNED FOR
WARRANTY CLAIM, DOMETIC RESERVES THE
RIGHT TO DENY CLAIM IF PROBLEM IS CAUSED
BY FREEZE DAMAGE.
Fig.
A – Freeze Damage Indicator Window: white stress marks indicate freeze damage
6
B – Water valve damage due to severe exposure to below-freezing temperature
6
A
B
9
10 Troubleshooting
Problem Possible Cause Service Instruction
1. Water will not stay in bowl. a. Flush ball seal is not properly
positioned.
b. Flush ball or seal is dirty.
c. Worn or damaged ush ball seal.
Dometi c Gravity-Flush Toil etTroublesho oting
a. Press pedal to hold ush ball
open, then lightly press down
around edge of ball seal with
nger to conform to ush ball.
b. Clean ush ball and seal.
c. Replace seal.
2. Odor from toilet when ush ball
is open.
3. Odor from toilet when ush ball
is closed.
4. Flush ball will not close
completely.
5. Water ow into toilet will not
stop.
6. Water does not enter toilet bowl
properly.
7. Hand sprayer leaks (hand
sprayer is not provided with
all models).
8. Water is leaking from water
valve.
9. Water is leaking from toilet base. a. Toilet is not secure to oor.
a. Plugged holding tank vent.
b. Odor from holding tank contents.
a. No water in bowl.
b. Damaged ush ball seal.
c. Damaged oor ange seal.
a. Too much friction between ush
ball and seal.
a. Worn or defective water valve. a. Replace water valve.
a. Insufcient water ow rate at
toilet inlet.
b. Screen at water valve inlet is
clogged.
c. Water valve is worn or damaged.
d. Plugged rim wash holes in toilet.
a. Hand sprayer is defective. a. Replace hand sprayer.
a. Water line connection is loose or
not seated properly.
b. Water valve is damaged or
defective.
b. Worn or defective oor ange
seal.
a. Clear obstruction from vent.
b. Add deodorant to holding tank.
a. Add water to bowl.
b. Replace seal.
c. Replace oor seal.
a. Clean and lubricate ush ball
and seal with silicone spray or
furniture polish.
a. Make sure ow rate at toilet inlet
is 3.0-5.0 gpm / 11.4-18.9 lpm
(recommended rate).
b. Clean screen.
c. Replace water valve.
d. Clean rim wash holes.
a. Insure that threads are not
cross-threaded and tighten
connection.
b. Replace water valve.
a. Tighten toilet mounting bolts.
b. Replace oor ange seal.
10. Water is leaking from rear of
toilet.
10
a. Loose vacuum breaker.
b. Damaged or defective vacuum
breaker.
c. Cracked or defective toilet bowl.
a. Make sure vacuum breaker stem
is pushed fully into sealing
grommet in back of bowl.
b. Replace vacuum breaker.
c. Replace toilet.
Dometi c Gravity-Flush Toil et Warranty / C ustomer service
11 Warranty
Manufacturer’s Two-Year and Ten-Year Limited Warranty
Dometic Corporation warrants, to the original purchaser only, that this Dometic® gravity discharge toilet, if used for personal,
family or household-like purposes, is free from defects in material and workmanship for a period of two (2) years from the
date of purchase.
Dometic also warrants, to the original purchaser only, that the ceramic portion of the toilet bowl will not scratch or craze for
a period of ten (10) years if used for personal, family or household-like purposes, and is regularly cleaned as described in
the product owner’s manual.
If this Dometic product is placed in commercial or business use, it will be warranted, to the original purchaser only, to be
free of defects in material and workmanship for a period of ninety (90) days from the date of purchase.
Dometic reserves the right to replace or repair any part of this product that proves, upon inspection by Dometic, to be
defective in material or workmanship. All labor and transportation costs or charges incidental to warranty service are to be
borne by the purchaser-user.
EXCLUSIONS
IN NO EVENT SHALL DOMETIC BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, FOR DAMAGES
RESULTING FROM IMPROPER INSTALLATION, OR FOR DAMAGES CAUSED BY NEGLECT, ABUSE, ALTERATION, OR
USE OF UNAUTHORIZED COMPONENTS. THIS INCLUDES FAILURES WHICH MAY RESULT FROM NOT FOLLOWING THE WINTERIZATION OR CLEANING PROCEDURES AS DESCRIBED IN THIS OWNER’S MANUAL. ALL IMPLIED
WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR
PURPOSE, ARE LIMITED TO A PERIOD OF ONE (1) YEAR FROM DATE OF PURCHASE.
IMPLIED WARRANTIES
No person is authorized to change, add to, or create any warranty or obligation other than that set forth herein.Implied
warranties, including those of merchantability and tness for a particular purpose, are limited to one (1) year from the date of
purchase for products used for personal, family or household-like purposes, and ninety (90) days from the date of purchase
for products placed in commercial or business use.
OTHER RIGHTS
Some states do not allow limitations on the duration of an implied warranty, and some states do not allow
exclusions or limitations regarding incidental or consequential damages; so, the above limitations may not apply to you.
This warranty gives you specic legal rights, and you may have other rights which vary from state to state.
To obtain warranty service, rst contact the local dealer from whom the product was purchased or go to
http://www.dometic.com/enus/Americas/USA/Customer-Support/ for a dealer near you.
12 Customer service
12.1 Toilet model identification
The toilet model identication label is located on the toilet base
under the water valve. Please have this information ready if
contacting Dometic for customer service.
12.2 Contact information
There is a strong, worldwide network to assist in servicing and
maintaining your toilet system. For the Authorized Service Center
near you, please call from 8:00 a.m. to 5:00 p.m. (ET)
Monday through Friday.
You may also contact or have your local dealer contact the Parts
Distributor nearest you for quick response to your replacement parts
needs. They carry a complete inventory for the Dometic product line.
Telephone: 1 800-321-9886 U.S.A. and Canada
330-496-3211 International
Fax: 330-496-3097 U.S.A. and Canada
330-496-3220 International
Web site: http://www.Dometic.com
11
Dometi c Gravity-Flush Toil et
Dometic Group is a customer-driven, world-leading provider of leisure
products for the RV, automotive, truck and marine markets. We supply
the industry and aftermarket with a complete range of air conditioners,
refrigerators, awnings, cookers, sanitation systems, lighting, mobile
power equipment, comfort and safety solutions, windows, doors and
other equipment that make life more comfortable away from home.
Dometic Group supplies a wide range of workshop equipment for
service and maintenance of built-in air conditioners. Dometic Group
also provides specially designed refrigerators for hotel rooms, ofces,
wine storage and transport and storage of medical products.
Our products are sold in almost 100 countries and are produced mainly
in wholly-owned production facilities around the world.
® Registered; ™ Trademark of Dometic Corporation
© Dometic Corporation
600346504-book 05/11
12
DOMETIC C ORPORATION , SANITATION DIVISI ON
13128 SR 226 | PO BOX 38
BIG PRAIR IE, OHIO 44611 USA
www.Do metic.co m
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