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Mine was also 1/2 Pex. I installed a Dometic 310 in my 3750. I also added an in line shut off valve in the water supply line behind the toilet. This way I can just shut the water off to the toilet if I need to do any maintenance or cleaning and still have water in the rest of the RV.. Plus if I get a leak I don't have to run outside.
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2012 Silverado 3500HD|4x4|Crew Cab|long bed|Dually
2012 Montana 3750FL
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