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I do the same as RipNC. 2014 model and in 8 years I have replaced 3 valves so using the one "main" add on valve and backflushing is working well. We FT for 5 year in that period and now are 6 months in/ 6 months home so it gets a lot of use. No build up.
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2014 3100RL Mor Ryde Goodyear G614
2015 Duramax Crew DRW Curt Q24
Wirehaired Wiener Dogs and the Better Half
Full-time and Work Camp
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