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A sacrificial galvanic anode rod is used to prevent corrosion to a more noble metal. When attached to the noble metal, the anode will corrode before the noble metal will corrode. In the case of a water heater application, the sacrificial anode rod is inserted into the tank and the metal it is protecting, the inside of the tank, will not corrode unless the anode rod corrodes away first.
Anode rods should be checked annually for corrosion. If the rod has corroded a significiant amount, then it should be replaced with a new anode rod. If the anode rod is changed out regularly as needed, the tank’s lifetime will usually expand from years to decades.
The type of anode rod chosen for a water heater depends on water quality. Magnesium rods are intended for soft water or not-so-hard water applications. As it corrodes, magnesium will dissolve into the water, making a healthy water for drinking. Aluminum rods are used for hard water or even salt water applications. Aluminum rods mixed with zinc will help remove sulfur dioxide smells (rotten eggs) from water, which will be present when there is heavy amounts of Iron in the water.
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TECHNICAL SPECS: Single wall dielectric design optimized for steel tanks; Max Heat Transfer Fluid Operating Temperature: 200 F @ 20 PSI or 180 F @ 100PSI; Must be used with non-toxic heat transfer fluid such as water mixed with propylene glycol. Fits all 1″ female NPT/FPT heating element receptacles; Can be used with a flange adapter to fit flange type heating element receptacles; Standard I/O Plumbing Fittings: Input ½” Male NPT/MPT, Output ½” Female NPT/FPT; Built to last with lead free metals and heat resistant CPVC; Requires Teflon thread tape for a water tight installation and seal (Not Included). Each Sidewinder can be used with a solar water array up to 13 square feet of insulated solar surface area in climates with high solar insolation. Solar surface area is limited by the probability of overheating the CPVC to near or above 200 F.
HEATING CAPACITY: The US Dept. of Energy (DOE) suggests sizing a solar water heater to 1.5 gallons of water for every square foot of flat plate solar collector. Each Sidewinder is recommended to heat up to 20 gallons of water when using the recommended maximum of 13 sq ft of insulated flat plate solar collectors. This product will not achieve desired results when used with non-insulated polymer based solar arrays/collectors (such as solar pool/spa heaters) due to the collector’s inability to reach or maintain temperatures above 130F. In addition, large energy losses may occur when heated fluid lines are not well insulated. For tested and proven results, use with Heliatos products.
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