Those waste disposal tools would be suitable for the 200 series tanks which use an internal bung ring, but not for the 700/900 tanks. They use a large plastic collar lock ring on an outside thread. You need an outside grip wrench like the oil filter pliers that Amarin pictured. If you don't have access to something like that then I've always found a nice piece of hardwood used as a drift with a hammer gets the job done and won't damage the plastic if you tap around the notches a few times.

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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now
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