Best ratings
1 . Magnesium anode for boiler 45 - 80 L
„I am satisfied with the product.“
2 . Magnesium anode for boiler 15 - 40 L
„OK“
3 . Heating Element 1250 W / 230 V
„OK“
Boat Water Boilers
Connecting your hot water boiler to the engine: When installing a hot-water boiler on board, the 220-volt power supply should be additionally equipped with an FI personal protection machine and an isolation transformer.
Learn more about Hot Water Boilers...
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Category
Operating voltage
Watts
Length
Incl. mixing valve
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For ATI
Max. pressure
For Isotherm
Spare part for
For Sigmar Marine
Inner-Ø
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Order by
Ratings
Brand
Price range
€
Availability
Category
Operating voltage
Watts
W
Length
mm
Incl. mixing valve
Outer material
Tank material
Weight
kg
For ATI
Max. pressure
bar
For Isotherm
Spare part for
For Sigmar Marine
Inner-Ø
Made in Italy
-16%
ATI
Water Heater / stainless steel / 22-60 litre
€636.65
from
€534.95
6 variants
Made in Italy
-9%
ATI
Water Heater / enamelled / 22-60 litre
€529.55
from
€479.95
8 variants
Made in Italy
-26%
ATI
BB2008X Water Heater / stainless steel / rectangular / 20 litre
€892.50
only
€659.95
4
Made in Italy
-29%
ATI
BQ2208 Water Heater / enamelled / rectangular / 22 litre
€821.10
only
€579.95
2
Made in Italy
-15%
SIGMAR MARINE
COMPACT Water Boiler / stainless steel / 20-40 litre
€589.65
from
€499.95
4 variants
Made in Italy
-16%
JOHNSON PUMP
AquaH Water Heater / stainless steel / 45 litre
€955.30
only
€799.95
1
Made in Italy
-21%
QUICK
NAUTIC Water Heater / stainless steel / 15-100 litre
€763.98
from
€599.95
12 variants
Made in Italy
-17%
QUICK
B3 Water Heater / stainless steel / 15-80 litre
€589.65
from
€489.95
12 variants
Made in Italy
-16%
QUICK
NAUTIC Water Heater / stainless steel / rectangular / 16 litre
€1,077.55
only
€899.95
2
Made in Europe
-8%
ISOTHERM
SPA Hot Water Boiler / stainless steel / 15-30 litre
€499.80
from
€459.95
4 variants
-12%
ISOTHERM
SLIM Hot Water Boiler / stainless steel / 15-25 litre
€678.30
from
€598.95
3 variants
-8%
ISOTHERM
BASIC Water Heater / stainless steel / 24-50 litre
€716.38
from
€659.95
4 variants
Made in Europe
-8%
ISOTHERM
SQUARE 16 Water Heater / stainless steel / rectangular / 16 litre
€859.18
only
€789.95
1
Made in Italy
ATI
BR Series Water Boiler / stainless steel / 2 heating elements / 45-60 litre
from
€864.95
2 variants
Made in Italy
-14%
SIGMAR MARINE
COMPACT Water Boiler / stainless steel / 2 heating elements / 40-60 litres
€905.59
from
€779.95
2 variants
Made in Italy
-18%
SIGMAR MARINE
COMPACT Hot Water Boiler / stainless steel / 60 litres / 800 W
€853.23
only
€699.95
Made in Italy
-7%
ISOTHERM
Safety Valve for SLIM, BASIC, SPA Boilers
€79.87
only
€73.95
Made in Italy
Safety Valve / 6 bar
only
€34.95
> 100
Made in Italy
QUICK
Heating Element Gasket
only
€15.95
61
Made in Europe
-18%
ISOTHERM
Heating Element for BASIC/SLIM 24 - 75 l / 750 W / 230 V
€60.62
only
€49.95
15
Made in Italy
-13%
ISOTHERM
Heating Element for SQUARE 16 l / 750W / 230V
€57.32
only
€49.95
4
Made in Italy
-17%
ISOTHERM
Heating Element for older models (orange) 750W/220V
€96.53
only
€79.95
8
SIGMAR MARINE
Thermostat Mixing Valve
only
€92.95
25
Made in Europe
-6%
ISOTHERM
Cover Cap for BASIC Hot Water Boiler 24 - 75 litres
€38.15
only
€35.95
2
Made in Italy
ISOTHERM
Gasket Set for BASIC / SLIM / SPA Boiler
only
€34.95
Expected to be in stock within 2-3 weeks
Made in France
ISOTHERM
Overheating Thermostat for BASIC / SLIM / SQUARE / SPA Hot Water Boilers
only
€38.95
Available on 16.06.2026
Made in Italy
-6%
ISOTHERM
Thermostat for BASIC / SLIM / SQUARE / SPA Hot Water Boilers
€49.75
only
€46.95
Available on 09.06.2026
Made in Italy
ISOTHERM
Heating Element for BASIC 40/50/75 and SLIM 20/25 / 1200 W / 230 V
only
€64.95
5
Made in Italy
Heating Element 550 W / 230 V
only
€44.95
50
Made in Italy
Heating Element 850 W / 230 V
only
€44.95
68
Made in Italy
Heating Element 1250 W / 230 V
only
€44.95
20
Made in Italy
-7%
ATI
Mounting bracket for BB2008X
€16.66
only
€15.50
3
Made in Europe
-5%
Magnesium anode for boiler 15 - 40 L
€11.54
only
€10.95
> 100
Made in Europe
-7%
Magnesium anode for boiler 45 - 80 L
€13.92
only
€12.95
32
Made in Europe
Sealing ring for heating element
only
€1.95
> 100
Made in France
-8%
Thermostat for heating element / 16 A
€21.66
only
€19.95
97
Made in Italy
-8%
Safety valve / 8 bar
€22.37
only
€20.50
21
Made in Italy
-6%
Thermostat Mixing Valve
€116.62
only
€109.95
19
-17%
Boiler Connection Sets
€30.18
from
€24.95
2 variants
-17%
Boiler Connection Set for ISOTHERM
€33.67
from
€27.95
2 variants
SVB recommends that you secure your unit with a 10 amp / 220 volt fuse. The current-carrying cable should consist of a braided 2.5 mm² cable, which is not only guided through the bilge but also installed in such a way that the cable won't break under vibration.
The hot water boiler is connected via a bypass to the internal cooling circuit of the motor boat. Heat-resistant hoses should be used, so that they are not damaged by the temperature of the cooling water. In the main line between the bypass entry and exit, a reduction valve is to be used to regulate the amount of current going through the hot water heater. It is recommended that the hose is installed in a such a manner that it enters the heat exchanger of the hot water heater before the drain valve. In the event that servicing or repair of the heat exchanger is needed, it can be easily emptied. Make sure that the cooling water temperature does not exceed 85°C. If this should be the case, a mixing valve must be installed. The mixing valve works automatically. You just have to turn the knob in order to reach temperatures between 38 and 65°C with a tolerance of +/- 7 degrees. Reliability is ensured with this device. The thermostat measures the temperature and adjusts itself, depending on the supply of hot and cold water.
The hot water boiler is connected via a bypass to the internal cooling circuit of the motor boat. Heat-resistant hoses should be used, so that they are not damaged by the temperature of the cooling water. In the main line between the bypass entry and exit, a reduction valve is to be used to regulate the amount of current going through the hot water heater. It is recommended that the hose is installed in a such a manner that it enters the heat exchanger of the hot water heater before the drain valve. In the event that servicing or repair of the heat exchanger is needed, it can be easily emptied. Make sure that the cooling water temperature does not exceed 85°C. If this should be the case, a mixing valve must be installed. The mixing valve works automatically. You just have to turn the knob in order to reach temperatures between 38 and 65°C with a tolerance of +/- 7 degrees. Reliability is ensured with this device. The thermostat measures the temperature and adjusts itself, depending on the supply of hot and cold water.
Customer ratings & reviews
All reviews (203.674)
Ivan M. on 05.06.2026
Objednavka dosla vporiadku dakujem
Michael P. on 04.06.2026
Ordering process great, communication fantastic, DHL delivery was also great, I use SVB a lot!
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