Get a bigger strap wrench, make sure the filter housing is stabilized so you do not snap off the mounting or any plastic piping. On our MH, I wedge a piece of wood between the filter housing and the side of the compartment to stabilize it if it does not want to twist off easily.
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Sold the Motorhome, joined the fully retired gang. '07 Winnebago Journey 34H, ISB-02, MH2500
Toad - '08 Ford Taurus X, Blue Ox, Aventa
US Gear UBS
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