Join Date: Feb 2011
Location: San Francisco Bay area
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Re: Universal M-18 Heat Exchanger
Well I think someone got creative after stripping those threads. But the simple fact is, if a zinc anode isn't corroding, the HX is instead. My suggestion is to drill, tap the thread, install a proper zinc.
I found that my chandler stocks all the common zincs so ideally you should take your HX down there to make sure you get one that fits.
Bristol 31.1, San Francisco Bay