Seaward Products is a major manufacturer of marine water heaters. All heaters feature aluminum hold down brackets, dual wall heat exchangers, ignition protection, and your choice of marine galvanized or stainless steel exteriors. Available capacities are: 3, 6, 11, 20, and 28 gallon models, horizontal or vertical. All models are available without heat exchangers.
All Seaward water heaters are made in America by American workers. Don't be fooled... there is a difference!
BUY AMERICAN!
Check with us before ordering regarding plumbing requirements for your
particular installation.
Seaward Water Heaters Feature:
 | Combination electric/heat exchanger or electric only |
| Inner tanks made from Alcoa Alclad aluminum alloy |
| Hold down brackets welded to inner tank |
| Available in 120V and 240V configurations |
| Temperature pressure relief valve |
| Magnesium anodes available |
| Large 1/2-inch drain valve |
| Exteriors are marine galvanized steel |
| Optional stainless steel or painted aluminum exteriors |
| Ignition protected |
| T & P drain tube included |
| Tempering valves available |
Click on image for larger picture.
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| S300 | F600 | S1100 |
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| S1900 | H2850 |
| Model Number | Capacity | Exchanger | Orientation | Overall Size | Exterior Material | Shipping Weight |
| S3001 | 3 gallons | Side | Horizontal | 14½w x 14d x 13"h | Painted Aluminum | 14 lbs |
| S6001 | 6 gallons | Rear | Horizontal | 13w x 19d x 13"h | Marine Galvanized Steel | 26 lbs |
| F6001 | 6 gallons | Front | Horizontal | 13w x 19d x 13"h | Marine Galvanized Steel | 26 lbs |
| S7001 | 6 gallons | Rear | Horizontal | 13w x 19d x 13"h | Stainless Steel | 24 lbs |
| F7001 | 6 gallons | Front | Horizontal | 13w x 19d x 13"h | Stainless Steel | 24 lbs |
| S11001 | 11 gallons | Rear | Horizontal | 16w x 22d x 16"h | Marine Galvanized Steel | 34 lbs |
| F11001 | 11 gallons | Front | Horizontal | 16w x 22d x 16"h | Marine Galvanized Steel | 34 lbs |
| S12001 | 11 gallons | Rear | Horizontal | 16w x 22d x 16"h | Stainless Steel | 32 lbs |
| F12001 | 11 gallons | Front | Horizontal | 16w x 22d x 16"h | Stainless Steel | 30 lbs |
| S18001 | 20 gallons | Front | Vertical | 20¼w x 20¼d x 27"h | Marine Galvanized Steel | 46 lbs |
| S19001 | 20 gallons | Front | Vertical | 20¼w x 20¼d x 27"h | Stainless Steel | 45 lbs |
| H20001 | 20 gallons | Rear | Horizontal | 16w x 32d x 16"h | Marine Galvanized Steel | 48 lbs |
| HF20001 | 20 gallons | Front | Horizontal | 16w x 32d x 16"h | Marine Galvanized Steel | 48 lbs |
| H22001 | 20 gallons | Rear | Horizontal | 16w x 32d x 16"h | Stainless Steel | 47 lbs |
| HF22001 | 20 gallons | Front | Horizontal | 16w x 32d x 16"h | Stainless Steel | 47 lbs |
| H28502 | 28 gallons | N/A | Horizontal | 16w x 40d x 16"h | Painted Aluminum | 59 lbs |
1 120V models end in "00", are UL certified, and require a 15A circuit.
240V models end in "50", are CE certified, and require a 10A circuit
2 Standard 3,000W elements, 4,500W element
available. (requires 15A or 20A circuit respectively)
NOTE: All units are available with white polyester coated aluminum jackets.
Special Order Only.
1,500W element standard on all models except 28 gallon model.