Quick Summary
This is a one-piece, 22mm PVC screw cap for a Boston valve on inflatable watercraft. The source names boats, rafts, kayaks, canoes and SUPs as intended equipment.
Check that the existing valve is a 22mm Boston type and that its screw-on connection matches. Detailed thread or fit dimensions are not provided.
What to Compare Before Buying
- Valve type: Confirm the watercraft uses a Boston valve.
- Listed size: Match the 22mm specification to the valve.
- Connection: Compare the screw-cap fit with the existing valve; no further thread details are given.
- Quantity: The product title specifies one piece.
Before You Decide
Confirm the valve type, 22mm size and screw-on fit, and check that one cap is the quantity you need.

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