Any brand of synthetic teflon grease
SuperLube is the best quality. Liquid products are ok, Rob...IF you don't mind living with a never-ending job of pouring it in and waiting for 12 hours to use the toilet again every couple of weeks...'cuz anything that's thin enough to be poured down the head just washes out again in a few flushes. Otoh, it's only a 10 minute job once a year to take the top off the pump to put a healthy squirt of thick teflon grease into that lasts at least all season...and a $4 tube of it will last several years. Lubing the toilet is a PREVENTIVE maintenance job...waiting till the pump starts squeaking and gets hard to pump is tantamount to waiting till an engine starts to smoke before putting any oil in it. It's friction that's causing the pump to squeak and get stiff...and friction wears out seals, o-rings etc a lot faster than well-lubed ones.
SuperLube is the best quality. Liquid products are ok, Rob...IF you don't mind living with a never-ending job of pouring it in and waiting for 12 hours to use the toilet again every couple of weeks...'cuz anything that's thin enough to be poured down the head just washes out again in a few flushes. Otoh, it's only a 10 minute job once a year to take the top off the pump to put a healthy squirt of thick teflon grease into that lasts at least all season...and a $4 tube of it will last several years. Lubing the toilet is a PREVENTIVE maintenance job...waiting till the pump starts squeaking and gets hard to pump is tantamount to waiting till an engine starts to smoke before putting any oil in it. It's friction that's causing the pump to squeak and get stiff...and friction wears out seals, o-rings etc a lot faster than well-lubed ones.