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Dometic SeaLand Toilet

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A PDF document (471 KB) attached to Head Inspection and Repair Services of Harbor Security Boats in support of Commander Navy Region Southwest, from the Department of the Navy. Due Nov 16, 2026, 12:00 PM (UTC-8).

File name: 1.02 Dometic_SeaLand_711-M28_Toilet.pdf

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SeaLand

®

Gravity discharge Toilet
Owner’s Manual
SeaLand® 711-M28 Toilet

! WARNING

This manual must be read and understood
before adjustment, maintenance, or service
is performed. Modification of this product
can result in property damage.

Dometic Sanitation Corporation
13128 State Rt 226, PO Box 38
Big Prairie, OH 44611
SeaLand Product Customer Service: 1-800-321-9886
www.DometicUSA.com



Recommendations

1. Read the “Operating Instructions” section of the
manual carefully.
2. Make sure all guests understand the operation of
the SeaLand toilet.
3. Carry a few spare parts for the maintenance purposes. Dometic has developed several repair kits that will save you both time and expense should a
problem occur. See “Customer Service” section of
this manual.
4. Use only SeaLand brand® Tissue and SeaLand®
brand Holding Tank Deodorants to maintain a
trouble-free system.
5. 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.

Specifications
Product Name:

711-M28 SeaLand Marine Toilet

Shipping Information:

6. Do not flush foreign objects through the toilet.

Carton Sizes:
Toilet 21" x 18-1/2" x 13-1/2"
(533mm x 470mm x 343mm)

7. Do not allow small problems to go unsolved. As
soon as a problem is detected, correct it.

Tank 19-1/4" x 17-1/2" x 11-1/2"
(489mm x 445mm x 292mm)

Installation Instructions

Weight Approx. 49 lbs. (22Kg)

Tank:
1. Select position in bathroom where unit can operate
properly. Allow room for using the flush lever and
clearance for raising the seat and lid.

System:
Average water consumption per flush 1 Qt. (.95 L)

2. Position the tank 3/4" (19mm) away from the wall.
Mark four holes at mounts on tank base. After holes
are marked, remove tank, and drill pilot holes. Slide
tank back into position. Secure the tank with four
#14 x 2" long pan head screws and washers on all
tank mounts.

Minimum water consumption per flush 1 Pt. (.47L)
Dimensions:

3. Run 5/8" (16mm) I.D. hose to vent fitting and secure with hose clamps.
Install thru-hull vent fitting:
(not supplied with unit – SeaLand part number 346368)
4. Drill hole through the hull, well above water line
and directly above SeaLand toilet. Hole location is
determined by routing and length of hose.


Installation Instructions (cont’d)
5. Apply waterproof caulk around underside of thru-hull

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