MARTEC

MARTEC group products

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Martec Vacuum (Anti-Siphon) Valve 19mm, Volvo/Yanmar

Martec's 19mm vacuum (anti-siphon) valve is a safe, reliable protective component for your boat's engine. It effectively prevents siphoning in the engine's exhaust outlet — a phenomenon that can otherwise draw water back into the engine and cause serious damage while the engine is off. The valve is made from corrosion-resistant materials, fully leak-proof, and easy to install even in a tight engine bay.

This model fits Volvo Penta engines MD2010, 2020, 2030, 2040, D1-13, D1-20, D1-30, D2-40 and Yanmar engines 2YM15, 3YM20, 3YM30 — typically newer, more compact inboard engines. Always check your exact engine model before ordering.

19mm diameter
Compatible with Volvo Penta D1/MD2010-series and Yanmar YM-series engines
Prevents siphoning in the exhaust outlet
Corrosion-resistant, leak-proof material

Martec Vacuum (Anti-Siphon) Valve 19mm, Volvo/Yanmar

Available from the supplier

79,90 €

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Martec Vacuum (Anti-Siphon) Valve 25mm, Volvo/Yanmar

Martec's 25mm vacuum (anti-siphon) valve is a safe, reliable protective component for your boat's engine. It effectively prevents siphoning in the engine's exhaust outlet — a phenomenon that can otherwise draw water back into the engine and cause serious damage while the engine is off. The valve is made from corrosion-resistant materials, fully leak-proof, and easy to install even in a tight engine bay.

This model fits Volvo Penta engines MD22, TMD22, MD31, D2-55, D2-75, D3 and Yanmar engines 3JH, 4JH — typically mid-size and larger inboards. Always check your exact engine model before ordering.

25mm diameter
Compatible with Volvo Penta MD22/D2/D3-series and Yanmar 3JH/4JH engines
Prevents siphoning in the exhaust outlet
Corrosion-resistant, leak-proof material

Martec Vacuum (Anti-Siphon) Valve 25mm, Volvo/Yanmar

Available from the supplier

99,90 €

Martec 1/4 Zinc Anode, 40mm

Zinc anode for MARTEC heat exchangers

Zinc anode for MARTEC heat exchangers. Equipped with a 1/4 inch conical thread and a 40 mm long anode. Suitable for MARTEC 4 inch heat exchangers and effectively protects the metal parts of the heat exchanger from corrosion.

Features

Zinc sacrificial metal anode
1/4 inch taper thread
Intended for MARTEC heat exchangers
Effective protection against corrosion

Compatibility

MARTEC 4 inch heat exchanger

Attention

Always check the depth of the heat exchanger before installation.
The anode must not be too long.
If necessary, the anode can be shortened with a hacksaw.

It is recommended to replace the anode regularly to ensure that the heat exchanger remains effectively protected against corrosion.

Zinc
For Martec heater
Conical thread

Martec 1/4 Zinc Anode, 40mm

Available

20,60 €

Martec Zinc Anode 1/4 14mm

Zinc anode for Martec heat exchangers

Zinc anode for Martec heat exchangers, which protects the internal metal surfaces of the heat exchanger from corrosion. The anode acts as a sacrificial shield and prevents electrochemical corrosion in the engine cooling system.

Regular inspection and replacement of anodes is important to ensure the service life of the heat exchanger and proper cooling operation.

Compatibility

Martec 2 inch heat exchangers

Specifications

Material zinc
Thread 1/4 inch taper thread
Anode length 15 mm

Operation and maintenance

Installed in the anode position of the heat exchanger
Check the anode regularly during maintenance
Replace the anode when it is clearly worn.
A worn anode no longer protects the heat exchanger effectively.

A regularly replaced Martec zinc anode helps prevent corrosion damage and extends the life of the heat exchanger in demanding marine conditions.

Material zinc
Thread 1/4 inch taper thread
Anode length 15 mm

Martec Zinc Anode 1/4 14mm

Available

18,60 €

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Martec Vacuum (Anti-Siphon) Valve 12mm, Yanmar

Martec's 12mm vacuum (anti-siphon) valve is a safe, reliable protective component for your boat's engine. It's designed to effectively prevent siphoning in the engine's exhaust outlet — a phenomenon where, after the engine shuts off, water can be drawn back into the engine through the exhaust and cause severe, potentially engine-destroying damage. The valve is made from corrosion-resistant materials, fully leak-proof, and designed for easy installation even in tight engine bays.

This 12mm model is compatible with Yanmar YSE8-12 (raw-water cooled) and 1GM (raw-water cooled) engines, giving lasting protection that preserves engine function and lifespan. A popular spare part for Yanmar engine servicing and replacing worn-out valves.

12mm diameter
Compatible with Yanmar 1GM/YSE8-12 engines
Prevents siphoning in the exhaust outlet
Corrosion-resistant, leak-proof material

Martec Vacuum (Anti-Siphon) Valve 12mm, Yanmar

Available from the supplier

71,90 €

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Martec Vacuum (Anti-Siphon) Valve 16mm, Volvo/Yanmar

Martec's 16mm vacuum (anti-siphon) valve is a safe, reliable protective component for your boat's engine. It effectively prevents siphoning in the engine's exhaust outlet — a phenomenon that can otherwise draw water back into the engine and cause serious damage while the engine is off. The valve is made from corrosion-resistant materials, fully leak-proof, and easy to install even in a tight engine bay.

This model fits a wide range of Volvo Penta engines (MD1, 2, 3, 5, 6, 7, 11, 17, MB10, MD2001, 2002, 2003) and Yanmar engines (YSE8-12 fresh-water cooled, YSB8-12, YSM8-12, 1GM fresh-water cooled, 2GM, 3GM, 2QM15, 2QM20). Always check your exact engine model before ordering, as older Volvo Penta and Yanmar models use different valve sizes.

16mm diameter
Compatible with many Volvo Penta and Yanmar engines
Prevents siphoning in the exhaust outlet
Corrosion-resistant, leak-proof material

Martec Vacuum (Anti-Siphon) Valve 16mm, Volvo/Yanmar

Available from the supplier

71,90 €

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Martec Vacuum (Anti-Siphon) Valve 22mm

Martec's 22mm vacuum (anti-siphon) valve is a safe, reliable protective component for your boat's engine. It effectively prevents siphoning in the engine's exhaust outlet — a phenomenon that can otherwise draw water back into the engine and cause serious damage while the engine is off. The valve is made from corrosion-resistant materials, fully leak-proof, and easy to install even in a tight engine bay.

A robust, reliable choice for boat owners who want to ensure trouble-free engine operation. Always check your engine model and exhaust hose diameter before ordering — anti-siphon valve sizing varies between engine manufacturers.

22mm diameter
Prevents siphoning in the exhaust outlet
Corrosion-resistant, leak-proof material

Martec Vacuum (Anti-Siphon) Valve 22mm

Available from the supplier

88,90 €

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Martec Vacuum Valve Repair Kit

This repair kit for Martec vacuum (anti-siphon) valves fits all valve sizes (12–25mm), so a single spare-part number covers valves of every size. The kit includes the cap and rubber valve — the two parts that typically wear out or age first over time, causing the valve to leak or stop working reliably. An affordable way to service an existing vacuum valve yourself without replacing the whole unit.

Fits all Martec vacuum valve sizes (12-25mm)
Includes cap and rubber valve
Affordable alternative to replacing the whole valve
Easy to service yourself

Martec Vacuum Valve Repair Kit

Available from the supplier

15,90 €

MARTEC

MARTEC group products

Martec Vacuum (Anti-Siphon) Valve 19mm, Volvo/Yanmar

Martec Vacuum (Anti-Siphon) Valve 19mm, Volvo/Yanmar

Martec Vacuum (Anti-Siphon) Valve 25mm, Volvo/Yanmar

Martec Vacuum (Anti-Siphon) Valve 25mm, Volvo/Yanmar

Martec 1/4 Zinc Anode, 40mm

Martec 1/4 Zinc Anode, 40mm

Martec Zinc Anode 1/4 14mm

Martec Zinc Anode 1/4 14mm

Martec Vacuum (Anti-Siphon) Valve 12mm, Yanmar

Martec Vacuum (Anti-Siphon) Valve 12mm, Yanmar

Martec Vacuum (Anti-Siphon) Valve 16mm, Volvo/Yanmar

Martec Vacuum (Anti-Siphon) Valve 16mm, Volvo/Yanmar

Martec Vacuum (Anti-Siphon) Valve 22mm

Martec Vacuum (Anti-Siphon) Valve 22mm

Martec Vacuum Valve Repair Kit

Martec Vacuum Valve Repair Kit

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