u/SimplySpikedLemonade

Wanted to ask if anyone has suggestions for clearing air handler condensation drains. Our company was using co2 cartridge gallo guns for a long time and they worked perfectly. Now they have really started pinching pennies and we aren’t allowed to buy them anymore. We tried running different attachments for the shop vac down the drains and they would get the water out, but almost every single one we did that with would come back within a week or less. Someone suggested a Milwaukee air gun but I don’t see how that would work with how big that thing is and haven’t found attachments that fit. Wondering if anyone has any suggestions?