Size to the largest occasional part
Buying guides agree the common failure is sizing for typical hardware while ignoring the awkward housing. PartsWash starts from longest dimension, then checks batch size under light or heavy soil.
Why this ladder is only 5 and 40 gal
Verified VEVOR US recirculating listings checked 2026-09-10 sit at 5 gal portable (~18×13×9 in package; ~3.5 gal solvent) and 40 gal cabinet (~17 gal solvent; ~220 lb load claim). Mid-size 20 gal units exist from other brands but are outside this site’s verified ladder.
What SERP guides miss
Most pages explain industrial cabinet washers or brand-specific sinks without an interactive map from your part length and batch to a purchase class with an explicit NO_MATCH path.
Safety rules this screen never relaxes
Ventilate. Use PPE. Confirm fluid chemistry for the soils you clean. Dispose waste legally. Never wash energized electrical parts. Ratings are manufacturer claims — verify the listing. Affiliate tracking is pending.
Class ladder on this site
5 gal: longest ≤12 in and batch ≤10 light / ≤6 heavy. 40 gal: longest ≤40 in and batch ≤25 light / ≤15 heavy. Specs checked 2026-09-10 on the linked product pages.