Maybe a cartridge here and there. 

Finally, I got a hold of the auditor's office and this data is being stored in a 3480 cartridge (they're still in the 80s) and the only way I can get it is if a third party converts it or if I go into the office myself and copy everything down.

Otherwise, I've gotten 5 spam emails so far with things from twitter and cl systems, to printer cartridge ink.

Moen for any taps (cartridge has lifetime warranty and all cartridges are the same fo them).

I will say the last time I saw one of those that had a problem the large company that installed it gave my customer hell and tried to say their warranty was void because they had someone not from their company repair a moen posi-temp cartridge unrelated to the tub surrounding and cover. 

This worked well - I could get a couple hundred letters done in spare time on one Saturday or spread the job out after dinner during the week.As of last night my off-brand ink cartridge isn't recognized in my printer so I started looking at direct mail options. 

Faucets, shower heads, shower cartridges, diverters, escutcheons.  

I would not replace a shower cartridge if it's not dripping.

It looks like all the shower valves now have easy to replace cartridges, but only a few have integral shutoffs.

On some multi cartridge systems (say 4 head inside/ 1 unit outside) you cannot run both heat and air at same time in different rooms.