This is the bayonet that is unique to the vintage Thetford sewer hose system. The prongs are a different spacing than the modern Valterra standard seen on late model trailers.

This bayonet is made of ABS (not PVC) and has a 3.5" ID to allow it to be solvent welded around the end of a 3" ID ABS pipe or spigot.

It allows connection of any Thetford pronged adapter like these:

• Thetford Curved Hose End
• Thetford Straight Hose End
• Thetford Adapter to Threaded 3" Waste Line

And you will need one of these two caps for it:

• Thetford Cap with Garden Hose Connection
• Thetford Standard Cap

If you would like to install a bayonet for a modern Valterra waste hose system, use this version instead:

• Valterra Bayonets

This is Thetford part number 01639.