I flush our water heater once a year when I winterize the trailer. I haven't used vinegar/water mix that you posted, I use water only and Camco's water heater flush tool (#11691).
BTW, I find that same water heater flush tool convenient when filling the fresh water tank(s): It sticks way down in the filler neck, allows air to flow back out of the filler, and has a shutoff valve.
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Sherm & Terry w/rescue Eydie (min Schnauzer) & Charley (std Poodle)
SOLD:2015 Jay Flight 27RLS, GY Endurance (E), Days: 102 '15, 90 '16, 80 '17, 161 '18, 365+ '20
SOLD: 2006 Ford F350 PSD, 4WD, CC, LB, SRW, Camper pkg., 375,000mi
Full timing: Some will think you're crazy, some will be envious, just enjoy the freedom!
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