The expansion tanks started failing in my neighborhood at the same time at about 11 years. They are relatively easy to replace. I wanted one the same as the original, and found them at a plumbing supply store in Ocala. I replaced mine before I had water filteration with pressure gauges, so I bought one at Lowe’s. Mine is right at 63 PSI. Filling the expansion tank with an air compressor is easy. If they fail, bad things can happen as the author stated. Another reason to have whole house filtration…I can glance at the pressure every day.
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