Anode rod TESY M8×30, Ø25.5 mm, L 250 mm, magnesium – replacement protection element

Magnesium anode rod TESY M8×30, Ø25.5 mm, L 250 mm is a sacrificial protection element designed for corrosion control in domestic water heaters and boilers. The rod features a threaded M8×30 connection and a cylindrical magnesium body with a 25.5 mm diameter and 250 mm length. Installed in place of a spent anode, it reduces electrochemical corrosion inside the tank by preferentially reacting with aggressive ions, helping to preserve the inner surface of compatible TESY and similar appliances during routine maintenance or repair.

Advantages

The magnesium composition provides effective galvanic protection for steel tanks and heating elements, particularly in systems with soft or mildly aggressive water. Its standard M8×30 threaded connection allows straightforward replacement of worn anodes without modifying the heater. The rod’s dimensions offer compatibility with a range of TESY models and many similar water heaters, enabling predictable performance and easier maintenance scheduling.

Suitable for

• Corrosion protection of domestic water heater tanks
• Replacement during routine heater maintenance or repair
• Use in systems where magnesium anodes are recommended for water chemistry
• Appliances with a matching M8×30 anode fitting and similar dimensional requirements

Key specifications

• Material: magnesium sacrificial element
• Thread type and size: M8×30 threaded connection
• Diameter: 25.5 mm
• Length: 250 mm
• Design: cylindrical rod for in-tank installation

How to use

Shut off power and water supply to the heater and drain enough water so the anode connection is accessible. Unscrew the old anode using appropriate tools and inspect the tank interior for signs of corrosion or deposits. Fit the magnesium anode rod by threading it into the anode port until securely seated; avoid overtightening. Refill the tank, restore water and power, and check for leaks. Replace the anode periodically according to manufacturer guidance or when significant consumption of the magnesium rod is observed.

Usage recommendations

For best protection, choose an anode type matched to local water chemistry and follow the heater manufacturer’s maintenance intervals. In hard or highly chlorinated water, review whether magnesium anodes are suitable or if an alternative material is recommended. Inspect the anode annually and replace it when more than 50% consumed or when tank inspection indicates active corrosion.