Marine Freshwater Systems & Components
Pumps & Plumbing
Marine Freshwater Systems & Components
Build a reliable onboard freshwater system with marine pumps, pressure systems, accumulator tanks, freshwater tanks, water heaters, filters, purifiers, hoses, fittings, valves, and plumbing components designed for clean pressurized water throughout your vessel.
Whether you are supplying a galley sink, head faucet, shower, aft shower station, water heater, deck wash point, or complete cruising water system, choose marine-grade components built for dependable service in demanding onboard conditions.
Freshwater System Overview
Clean Pressurized Water for Life Onboard
A marine freshwater system stores, pressurizes, filters, heats, and distributes potable water to the places you need it onboard. The right setup improves comfort, reduces pump cycling, protects fixtures, and supports reliable water flow for drinking, cooking, washing, showering, and cruising.
Shop By System
Marine Freshwater Categories
Browse the core products used to build, repair, or upgrade freshwater delivery systems on boats and yachts.
Planning a Full Plumbing Upgrade?
Freshwater systems often connect with showers, taps, water heaters, filters, tanks, manifolds, and onboard monitoring. For a full system view, use the Modern Yacht Water & Plumbing Systems guide.
Pumps & Pressure
Freshwater Pumps & Pressure Systems
Marine pressure pumps deliver water on demand when a faucet, tap, or shower is opened. Accumulators, pressure switches, and controllers help create smoother, quieter water delivery.
Tanks & Storage
Freshwater Tanks, Fittings & Level Monitoring
Freshwater storage should be matched to vessel size, cruising range, available space, fill location, venting, inspection access, and system demand.
Hot Water
Marine Water Heaters
Hot water systems can use shore power, inverter power, engine heat, or combination heating depending on the vessel setup and cruising style.
Filtration & Purification
Cleaner Water for Drinking, Cooking & Washing
Water filtration and purification can improve taste, reduce sediment, protect fixtures, and support safer onboard water use.
Plumbing Components
Hose, Fittings, Valves, Manifolds & Strainers
Reliable freshwater performance depends on correctly sized hose, secure fittings, proper valves, clean strainers, and serviceable plumbing layouts.
Key Features
Why Marine-Grade Freshwater Components Matter
Marine freshwater equipment must handle vibration, moisture, corrosion, limited space, variable power supply, and repeated use in onboard environments.
Reliable Performance
Marine-grade components are designed for continuous-duty use and dependable water delivery in demanding conditions.
Corrosion-Resistant
Stainless steel, bronze, and engineered plastics help resist corrosion and extend service life.
Easy Installation
Standard fittings and serviceable layouts help make installation, inspection, winterization, and repairs easier.
Quiet Operation
Accumulator tanks, pressure control, and variable-speed pumps help reduce cycling, pulsing, and system noise.
Energy Efficient
Modern pumps and controllers can reduce power draw while improving water pressure and comfort onboard.
Comfort Onboard
A properly built freshwater system supports cruising, liveaboard life, cooking, washing, showering, and daily vessel use.
Parts Desk Insight
Choosing the Right Freshwater Part
Before ordering freshwater system parts, confirm the system type, voltage, hose size, pressure rating, flow requirement, available space, and connection style.
Match Voltage & Flow
Confirm 12V or 24V, gallons per minute, pressure rating, duty cycle, amperage draw, inlet size, and outlet size.
Check Hose Compatibility
Measure hose inside diameter and confirm potable-water rating, clamp type, barb size, and routing requirements.
Plan Service Access
Pumps, strainers, filters, tanks, heaters, and valves should be installed where they can be inspected and serviced.
Use the Right Fixture
Galley faucets, head faucets, showers, deck showers, and aft shower stations may require different fittings and flow rates.
Shop Marine Freshwater Systems
Browse freshwater pumps, pressure systems, tanks, water heaters, filters, purifiers, hoses, fittings, valves, manifolds, and fixtures for reliable onboard water supply.
Raritan 12-Gallon Marine Water Heater with Heat Exchanger — 120V AC (78-171211)
Premium Glass-Lined Marine Water Heater — Built to Last Below DeckThe Raritan 12-Gallon Marine Water Heater (78-171211) is a premium-grade water he...
View full detailsKuuma 11812 Marine Water Heater — 6 Gal, 120V AC, Front-Mount, Rear Heat Exchanger (735-11812)
6-Gallon Hot Water with Rear Exchanger Access — Shore Power or Engine HeatThe Kuuma 11812 (735-11812) rounds out the 6-gallon Kuuma front-mount lin...
View full detailsRaritan WH16 Thermostat Assembly — Marine Water Heater Replacement Part (78-WH16)
OEM Thermostat Assembly for Raritan Marine Water HeatersThe Raritan WH16 Thermostat Assembly (78-WH16) is the factory replacement thermostat for Ra...
View full detailsKuuma 11841 Marine Water Heater — 11 Gal, 120V AC, Front Heat Exchanger (735-11841)
Dual-Source Hot Water — Shore Power at the Dock, Engine Heat UnderwayThe Kuuma 11841 (735-11841) is an 11-gallon marine water heater designed to wo...
View full detailsRaritan 6-Gallon Marine Water Heater with Heat Exchanger — 120V AC (78-170611)
Premium Glass-Lined Marine Water Heater — Compact 6-Gallon CapacityThe Raritan 6-Gallon Marine Water Heater (78-170611) brings Raritan’s premium gl...
View full detailsSeaward S1100W Marine Water Heater — 11 Gal, 120V AC, White Epoxy Aluminum (698-S1100W)
11-Gallon Capacity with a Finish Built for Visibility and Corrosion ResistanceThe Seaward S1100W (698-S1100W) delivers the same proven 11-gallon, 1...
View full detailsKuuma 11842 Marine Water Heater — 11 Gal, 120V AC, Rear Heat Exchanger (735-11842)
Dual-Source Hot Water — Shore Power at the Dock, Engine Heat UnderwayThe Kuuma 11842 (735-11842) delivers the same proven 11-gallon, 120V AC perfor...
View full detailsSeaward S1100 Marine Water Heater — 11 Gal, 120V AC, Rear Heat Exchanger (698-S1100)
Serious Hot Water Capacity for Larger VesselsThe Seaward S1100 (698-S1100) is an 11-gallon marine water heater built for cruisers, liveaboards, and...
View full detailsKuuma 11840 Marine Water Heater — 11 Gal, 120V AC, Side-Mount, Front Heat Exchanger (735-11840)
11-Gallon Capacity, Side-Mount Flexibility — Shore Power or Engine HeatThe Kuuma 11840 (735-11840) brings full 11-gallon hot water capacity to vess...
View full detailsKuuma 11810 Marine Water Heater — 6 Gal, 120V AC, Side-Mount, Front Heat Exchanger (735-11810)
The Mid-Size Sweet Spot — 6 Gallons, Shore Power or Engine HeatThe Kuuma 11810 (735-11810) fills the gap between the compact 5-gallon 11800 and the...
View full detailsKuuma 11811 Marine Water Heater — 6 Gal, 120V AC, Front-Mount, Front Heat Exchanger (735-11811)
6-Gallon Hot Water, Front-Mount Flexibility — Shore Power or Engine HeatThe Kuuma 11811 (735-11811) is a 6-gallon marine water heater built for ves...
View full detailsKuuma 11800 Marine Water Heater — 5 Gal, 120V AC, Side-Mount, Front Heat Exchanger (735-11800)
Compact Hot Water for Smaller Vessels — Shore Power or Engine HeatThe Kuuma 11800 (735-11800) is a 5-gallon marine water heater built for day boats...
View full detailsJohnson Pump - Aquah Marine Water Heater 1200W 120V NPT SS - 564745502
Johnson Pump Aquah Marine Water Heater — 1200W, 120V, NPT, Stainless SteelThe Johnson Pump Aquah is a dual-heating marine water heater built for on...
View full detailsSeaward F600 Marine Water Heater — 6 Gal, 120V AC, Galvanized Steel (698-F600)
Hot Water On Demand — Built for the Marine EnvironmentThe Seaward F600 (698-F600) is a 6-gallon marine water heater engineered for reliable, safe h...
View full detailsForespar Marelon Male Elbow
Made from high-strength glass-reinforced Marelon. Dimension 'A' indicates pipe thread size. All elbows sold in U.S.A. have straight pipe threads.
Forespar Marelon Female Elbow
Made from high-strength glass-reinforced Marelon. Dimension 'A' indicates pipe thread size. All elbows sold in U.S.A. have straight pipe threads.
1 1/8 Hose Adapter
Made from high-strength, glass-reinforced Marelon.Perfect choice for joining hose lines to ball valves and seacocks.
Forespar Marelon Male Elbow
Made from high-strength glass-reinforced Marelon. Dimension 'A' indicates pipe thread size. All elbows sold in U.S.A. have straight pipe threads.
Forespar CF252 Marelon Hose Adaptor/Tailpipe
Made from high-strength, glass-reinforced Marelon.Perfect choice for joining hose lines to ball valves and seacocks.
Whale WX1504B Equal Straight, 15mm
The Quick Connect system can be used by anyone to install additional outlets or to replumb your boat or recreational vehicle. Whale Quick Connect f...
View full detailsForespar Marelon Male Elbow
Made from high-strength glass-reinforced Marelon. Dimension 'A' indicates pipe thread size. All elbows sold in U.S.A. have straight pipe threads.
Whale WX1503B Equal Elbow, 15mm
The Quick Connect system can be used by anyone to install additional outlets or to replumb your boat or recreational vehicle. Whale Quick Connect f...
View full detailsForespar CF252 Marelon Hose Adaptor/Tailpipe
Made from high-strength, glass-reinforced Marelon.Perfect choice for joining hose lines to ball valves and seacocks.
Forespar Marelon Male Elbow
Made from high-strength glass-reinforced Marelon. Dimension 'A' indicates pipe thread size. All elbows sold in U.S.A. have straight pipe threads.
Forespar CF252 Marelon Hose Adaptor/Tailpipe
Made from high-strength, glass-reinforced Marelon.Perfect choice for joining hose lines to ball valves and seacocks.
Forespar Marelon Female Elbow
Made from high-strength glass-reinforced Marelon. Dimension 'A' indicates pipe thread size. All elbows sold in U.S.A. have straight pipe threads.
Forespar CF252 Marelon Hose Adaptor/Tailpipe
Made from high-strength, glass-reinforced Marelon.Perfect choice for joining hose lines to ball valves and seacocks.
Forespar Marelon Male Elbow
Made from high-strength glass-reinforced Marelon. Dimension 'A' indicates pipe thread size. All elbows sold in U.S.A. have straight pipe threads.
Whale WX7164B Whalex 15mm Tubing, Red (50M)
The Quick Connect system can be used by anyone to install additional outlets or to replumb your boat or recreational vehicle. Whale Quick Connect f...
View full detailsForespar Marelon Female Elbow
Made from high-strength glass-reinforced Marelon. Dimension 'A' indicates pipe thread size. All elbows sold in U.S.A. have straight pipe threads.
Forespar CF252 Marelon Hose Adaptor/Tailpipe
Made from high-strength, glass-reinforced Marelon.Perfect choice for joining hose lines to ball valves and seacocks.
Forespar Marelon Female Elbow
Made from high-strength glass-reinforced Marelon. Dimension 'A' indicates pipe thread size. All elbows sold in U.S.A. have straight pipe threads.
Forespar CF252 Marelon Hose Adaptor/Tailpipe
Made from high-strength, glass-reinforced Marelon.Perfect choice for joining hose lines to ball valves and seacocks.
Whale WX1502B Equal Tee, 15mm
The Quick Connect system can be used by anyone to install additional outlets or to replumb your boat or recreational vehicle. Whale Quick Connect f...
View full detailsWhale BP2054 Gulper 320 High Capacity Shower/Galley Waste and Bilge Pump, 24V
This large diaphragm pump easily handles multi-drain gray waste water, remote mounted bilge pump, or fishbox discharge applications and is self-pri...
View full detailsWhale BP2052 Gulper 320 High Capacity Shower/Galley Waste and Bilge Pump, 12V
This large diaphragm pump easily handles multi-drain gray waste water, remote mounted bilge pump, or fishbox discharge applications and is self-pri...
View full detailsDIABLO Easy Switch Fresh Water Plate - Water Tank Level Sensor - Marine Monitoring
DIABLO Easy Switch Fresh Water Plate - Water Tank Level SensorProfessional fresh water tank level monitoring plate designed for marine water system...
View full detailsHose Adaptor for Valve - 1-1/2" BSPP Threaded - Plastic - Marine Plumbing Fitting
Hose Adaptor for Valve - 1-1/2" BSPP Threaded - PlasticPlastic hose adaptor designed for connecting hoses to valves with 1-1/2" BSPP (British Stand...
View full detailsHose Adaptor for Valve - 2" BSPP Threaded - Plastic - Marine Plumbing Fitting
Hose Adaptor for Valve - 2" BSPP Threaded - PlasticPlastic hose adaptor designed for connecting hoses to valves with 2" BSPP (British Standard Pipe...
View full detailsHose Adaptor for Valve - 1" BSPP Threaded - Plastic - Marine Plumbing Fitting
Hose Adaptor for Valve - 1" BSPP Threaded - PlasticPlastic hose adaptor designed for connecting hoses to valves with 1" BSPP (British Standard Pipe...
View full detailsFlexible Water Tank - 29-9/64" x 29-17/32" (74x75cm) - 14.5gal (55L) - Grey - with Fittings
Premium Flexible Water Tank - 55 Liter Collapsible Marine Water StorageThis professional-grade flexible water tank provides 14.5 gallons (55 liters...
View full detailsFlexible Water Tank - 29-9/64" x 33-5/64" (74x84cm) - 19.8gal (75L) - Grey - with Fittings
Premium Flexible Water Tank - 75 Liter Collapsible Marine Water StorageThis professional-grade flexible water tank provides 19.8 gallons (75 liters...
View full detailsFlexible Water Tank - 29-9/64" x 39-3/8" (74x100cm) - 26.41gal (100L) - Grey - with Fittings
Premium Flexible Water Tank - 100 Liter Collapsible Marine Water StorageThis professional-grade flexible water tank provides 26.41 gallons (100 lit...
View full detailsFlexible Water Tank - 29-9/64" x 49-7/32" (74x125cm) - 31.7gal (120L) - Grey - with Fittings
Premium Flexible Water Tank - 120 Liter Collapsible Marine Water StorageThis professional-grade flexible water tank provides 31.7 gallons (120 lite...
View full detailsFlexible Water Tank - 33-55/64" x 8-17/64" x 36-39/64" (86x21x93cm) - 14.5gal (55L) - Grey - with Fittings
Premium Flexible Water Tank - 55 Liter Collapsible Marine Water StorageThis professional-grade flexible water tank provides 14.5 gallons (55 liters...
View full detailsFlexible Water Tank - 44-7/8" x 8-17/64" x 45-43/64" (114x21x116cm) - 26.41gal (100L) - Grey - with Fittings
Premium Flexible Water Tank - 100 Liter Collapsible Marine Water StorageThis professional-grade flexible water tank provides 26.41 gallons (100 lit...
View full detailsFlexible Water Tank - 29-9/64" x 66-59/64" (74x170cm) - 52.8gal (200L) - Grey - with Fittings
Premium Flexible Water Tank - 200 Liter Collapsible Marine Water StorageThis professional-grade flexible water tank provides 52.8 gallons (200 lite...
View full detailsFlexible Water Tank - 29-9/64" x 59-1/16" (74x150cm) - 39.6gal (150L) - Grey - with Fittings
Premium Flexible Water Tank - 150 Liter Collapsible Marine Water StorageThis professional-grade flexible water tank provides 39.6 gallons (150 lite...
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