Jabsco 43990-0066 O-Ring — Marine Toilet & Pump Replacement Seal
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Jabsco 43990-0066 O-Ring
A precision-fit replacement O-ring for Jabsco marine toilet and pump systems. This small but critical seal maintains watertight integrity at key connection points within the pump assembly — preventing leaks, odours, and pressure loss that can compromise toilet performance over time.
Parts Desk Insights
This O-ring is the correct replacement when you're experiencing minor leaks at pump fittings or during a scheduled service interval on a Jabsco manual or electric marine toilet. It is most commonly replaced as part of a full service kit procedure — if you're already pulling the pump apart, replacing this seal at the same time is strongly recommended to avoid a repeat teardown. Always verify the part number 43990-0066 against your model's parts diagram before ordering, as Jabsco uses several O-ring sizes across their toilet range.
Key Features
- OEM Jabsco replacement O-ring — part number 43990-0066
- Maintains watertight seal at pump assembly connection points
- Prevents leaks and odour ingress caused by seal wear
- Compatible with Jabsco marine toilet and pump systems
- Compact and lightweight — ideal to keep as a spare aboard
Related Service Parts
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.