Overview

The Jabsco 18911-7020 is a Viton check valve kit for selected Jabsco diaphragm pumps. It is the service part used to replace the valve set in the pump head when the original valves no longer seal or cycle cleanly.

This kit fits Jabsco pump models 31800-0092, 31800-0094, 31801-0092, and 31801-0094. Those compatible pumps include both 12V and 24V versions, so the safest way to confirm fit is to match the pump model number on the unit rather than relying on appearance alone.

On a boat, this is a practical repair item when the rest of the pump is still worth keeping in service. It makes sense for owners and technicians servicing an onboard diaphragm pump instead of swapping the full assembly.

Key features

• Viton check valve kit for selected Jabsco diaphragm pumps
• Fits pump models 31800-0092, 31800-0094, 31801-0092, and 31801-0094
• Covers both 12V and 24V pumps within the compatible model list
• Replacement valve set for pump head service rather than full pump replacement
• Useful when the existing valve set is no longer sealing cleanly or holding normal pump operation

Compatibility and fit

This is the Viton version of the valve kit. Before ordering, check the pump label and confirm the exact Jabsco model number, especially if the pump has been in service for years or has already had parts changed during an earlier rebuild. Matching the valve material and model number matters more than matching the old part by sight.

Because this is a valve kit and not a complete pump, it is best suited to service work where the motor, diaphragm housing, and electrical side of the pump are still in usable condition. That makes it a sensible maintenance part for boats where access is tight and replacing the whole pump would add unnecessary work.

Installation and setup

When servicing the pump, isolate power, relieve line pressure, and open the pump head carefully so the existing valve orientation can be checked before reassembly. Clean the valve seats and surrounding passages before fitting the new parts, and inspect the diaphragm and housing while the pump is apart so wear in other areas does not get missed.

This kit is a good match for owners or service yards maintaining Jabsco diaphragm pumps used in onboard water or fluid systems where dependable pump cycling matters. It is especially useful when a pump still runs but the wet-end service parts have reached the point where a rebuild is the better next step.