The air pump I purchased from Jehmco (DAPMH15, which I think is just a rebranded Alita) gave out this morning after almost 8 years. I haven't opened it up yet to see what failed, but it probably just needs a new diaphragm.
My sump return pump (Laguna Max-Flo 4200) is still going strong after ~8 years.
Eheim Jaeger Heaters (all six of the 300W) appear to still be working great. I know there were some people that were disappointed with the Jaegers after Eheim bought them out and changed them up a bit, but they have been solid for me.
The Ranco controller the Jaegers are hooked up to, also going strong for 8 years.
I run Matala Mat in my sump and the grey high density mat started to really break down after 3 years. The Black low density mat started breaking down after 4 years. By breaking down, I mean that it went noodle soft (lost all rigidity). Both had to be replaced.
i have a cascade air pump that has been in service since 2002.. some down time but has been pumping air for at least 10 yrs of that time... i have some ac filters that have to be going on 15/20 yrs old of constant service .. i have several i bought used 7/8/10 yrs ago .. *every* one is still in use...
So far I have a pair of AC110s with two years of use, just the impeller shafts been replaced. An FX4 with a year and half, second one has a year of use. Two Ehiem 400 air pumps and two Ehiem 250Watt heaters with a year and half of use. One 2ft and one 4ft long Fluval aquasky led lights with 1.5 years of use.
Let's see how long they last before replacing or repairing.