Jabsco Joker Valve

Overview

The Jabsco 29092-1000 is a replacement joker valve for select Jabsco marine toilets and conversion kits, including models 29090, 29120, 29200, 58040, 58060, 58080, 58240, 58260, 58280, and 58500.

This is the one-way discharge valve that helps stop waste and flush water from creeping back toward the bowl after the pump cycle. It is a small service part, but it has a direct effect on how cleanly the toilet flushes and how well the discharge side holds its seal.

For boat owners servicing an older Jabsco head, this is the part to check when the toilet starts to lose discharge control or the bowl does not clear the way it should. It suits both manual Jabsco toilets and several electric toilet layouts that use the same joker valve in the discharge path.

Key features

• Replacement joker valve for select Jabsco manual and electric marine toilets
• Fits models 29090, 29120, 29200, 58040, 58060, 58080, 58240, 58260, 58280, and 58500
• Helps maintain one-way discharge flow and reduce backflow into the bowl after flushing
• Used across both manual toilet assemblies and electric toilet systems that share this valve format
• Useful service part when the old valve has hardened, distorted, or no longer closes cleanly

Compatibility and fit

This valve is meant for specific Jabsco toilet families, not as a universal sanitation valve. Match the toilet or conversion-kit model before ordering, especially on boats that have had pump or toilet upgrades over time.

It is a good fit for owners maintaining Jabsco manual heads in the 29090 and 29120 range, as well as Jabsco electric toilet systems built around the listed 58-series and 58500 layouts. On mixed-age boats where the toilet may have been repaired more than once, checking the existing valve during service is the safest way to confirm fit.

Installation and service

The joker valve sits in the discharge side of the toilet system, so replacement is usually part of routine toilet service rather than a full system rebuild. Before opening the toilet or discharge housing, close the seacocks and isolate the system the same way you would for any sanitation maintenance below deck.

When the old valve no longer keeps its shape, discharge can slip back after a flush and the toilet can start to feel less crisp in use. Replacing this part at that stage is a practical maintenance job for cruising boats, fishing boats, and day boats that rely on a Jabsco head for regular onboard use.

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