I leave mine out when I drain it. If it is over 2/3 gone I replace it. They are available at most rv supplies for under $20. I always have a spare on hand.
That opening doubles as a drain on the Suburban WH's and MUST be kept there in order to prevent damage to the tank from electrolysis.
2011 351RLTS Eagle, Mor/Ryde suspension & pin box
06 F350 Lariat PSD, SRW, LB, CC, EGR delete kit, 16K DrawTite hitch, Timbrens, TST TPMS
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