Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.

Dixon · Probes & Sensors
5204K1
In stock · ships from Knoxville
This is a Baylast™ poppet O-ring repair kit for Dixon 5204 series API bottom load valves used on tank trucks and trailers.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 1 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Other applications
Other applications
Fits only Dixon 5204 series bottom load valves; not a universal O‑ring.
Part data verified against 5 catalog sources
Different year, make, or config? Get a confirmation against your truck in under a minute.
It replaces the worn or leaking O-ring on the valve poppet to ensure a tight seal during liquid loading and unloading. Over time, exposure to fuels and chemicals can degrade the O-ring, causing drips or failure to seal, so prompt replacement prevents leaks and maintains safe operation.
Part Number: 5204K1
O-RING KIT FOR 5204
Unit: ea
Vendor: Dixon Valve & Coupling Co.
Dealer: Post Onsite
Compatibility, alternatives, and more