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.
Post Onsite · Air System
409708
In stock · ships from Knoxville
This is a Y-valve O-ring, a circular rubber seal used in pneumatic Y-shaped valves found in truck air brake systems, such as quick release or double check valves.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
It seals the internal components to prevent air leaks and maintain proper brake pressure. The O-ring is typically replaced when it becomes dry, cracked, or deformed, causing air leaks or sluggish valve operation.
Part Number: 409708
Y-VALVE O-RING
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more
Parts commonly needed alongside air system
