I know others have had issues with the Thetford, but ours has worked well since new in 2016. It sometimes goes through short periods when it won,t hold water but a cleaning with a toitet brush in the hole with the ball open usually cures that. I had the same issue in our last Montana that had a Dometic in it. We use the trailer about 5 months a year.
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Gayle and John Devall
2017 Legacy 3720 IS and Disc brakes
1120 watts solar panels and 300 AH lithium batteries
2011 Ford f350 srw long box Lariat with B&W Patriot hitch. Residential Fridge.
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