The Jabsco 18590-series electric macerator empties compatible holding tanks through a 1½-inch inlet and 1-inch hose-barb outlet. Its internal flexible impeller, stainless cutter, shaft seal and wearplates appear separately in Jabsco's exploded service drawing. The illustrated 18590-2092 is the 12-volt model.
See the actual parts and assemblies
Select any photo to view its NewRVParts product listing. Complete systems and separate service parts have their own order numbers.
18590-2092 — Jabsco 18590 12V macerator with run-dry protectionComplete 12V holding-tank macerator; one view
18590-2092 — Jabsco 18590 12V macerator, additional viewAdditional view of the same complete 18590 unit
1040-0000 — Jabsco macerator pump shaft-seal service partShaft lip-seal part number shown in Jabsco 37010 and 18590 parts lists
Jabsco 18590 factory macerator exploded drawing
The original manufacturer drawing provides the component positions and service orientation.
Enlarge the original parts drawing
Open the manufacturer PDF separately to zoom in on component numbers.
Parts identified by manufacturer number
The table identifies factory components; an unlinked part number is not a separate product listing.
| Callout | Jabsco part number | Component / description |
|---|---|---|
| 1a | 17288-1000 bolt kit | Two shorter housing bolts |
| 1b | 17288-1000 bolt kit | Two longer housing bolts |
| 2 | 18594-1000 | Macerator housing kit |
| 3 | 37056-2000 | Stainless chopper plate with locknut |
| 4 | 18597-1000 | Large wearplate |
| 5 | 18596-1000 | Gasket kit, two gaskets |
| 6 | 6303-0003-P | Flexible nitrile impeller |
| 7 | 12316-1002 | Small wearplate |
| 8 | 18593-1000 | Pump body |
| 9 | 1040-0000 | Shaft seal; same manufacturer part number |
| 10 | 6342-0000 | Motor-shaft slinger |
| 11 | 17246-1012 | 12-volt motor, for 18590-2092 |
| 11 (24V) | 17246-1024 | 24-volt motor, for 18590-2094 |
| 12 | 92900-0120 | Rubber mounting grommets |
| Wet-end service kit | 18598-1000 | Body, seal, impeller, gaskets and small wearplate |
| Housing bolt kit | 17288-1000 | Four replacement bolts in two lengths |
Choose the correct replacement
Jabsco 18598-1000 is the service kit for the 18590 macerator. Flojet 18598-2000 is a different kit used for the portable 18555 waste pump; do not interchange the packages. Jabsco's parts drawing also identifies 1040-0000 as the shaft seal. Check the installed 12V or 24V model before selecting a motor. The manual lists a 25-amp circuit fuse for the 12V 18590 and warns against running dry for more than 30 seconds, despite its protective shutoff. Do not use the pump to handle wipes or other fibrous objects that the manufacturer excludes.