05.4170-07 is an automatic float drain that was used on several SPX Hankison, Deltech, and FS Curtis air filters and refrigerated dryers. This part number is often times shown as 3232490. SPX often refers to this drain as their Snap-Trap drain mechanism.
The actual Hankison part number is 05.4170-07, however SPX will often show their material or catalog number of 3232490 on their parts breakdowns.
This float drain was commonly paired with several versions of the smaller Hankison HF series inline filters and the smaller FS Curtis CF series of air filters. The maximum pressure for this drain is 250 psi.