Astoria Straight Heat Exchanger Brand_Cosmetal corroded contacts are a more

corroded contacts are a more common culprit than a burnt-out bulb

it's the scale we recommend without hesitation

while the older (obsolete) style is secured with a nut and ferrule

Don't confuse this with the steam valve - this one is hot-water-only and has no anti-vacuum function

EAN: 4711467465382

Astoria Straight Heat Exchanger Brand_Cosmetal corroded contacts are a moreAstoria Straight Heat Exchanger The oldest version of this heat exchanger, no longer in production. This is limited old stock inventory that has been sitting for roughly two decades, so units show heavy surface oxidation. COMPATIBILITY Fits: older Astoria boiler assemblies using the straight style heat exchanger (discontinued, not interchangeable with later curved versions) INSTALLATION Moderate DIY to professional difficulty; recommend a qualified