Go to a used plumbing supply place and find an older stouter model in good condition. Seems like plumbing parts are being built lighter and cheaper. I hate having bathrooms above drywall. If at all possible I remove the drywall under bathrooms and put some kind of plastic material in its place.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13