3/4" Aluminum Heater Hose End Cap - Blue

• Aluminum end cap seals off an unused 3/4" heater hose connection point

• Blue finish gives a clean, finished look to a capped-off hose end

• Universal fit for any 3/4" heater hose being blocked off or deleted

• Simple push-on installation with a hose clamp for a secure seal

This aluminum heater hose end cap seals off an unused 3/4" heater hose connection point, commonly used when deleting a heater core, bypassing a hose run, or simplifying a cooling system layout. The blue finish gives the capped-off hose end a clean, finished appearance rather than leaving it looking makeshift.

This is a universal-fit cap sized for 3/4" heater hose — confirm your hose's inside diameter matches before ordering. This cap seals the hose end; it does not regulate cooling system pressure the way a radiator cap does, and shouldn't be confused with one.

Common Uses
Used when deleting a heater core, capping off an unused heater hose port, or simplifying a cooling system's hose routing during a custom build or swap. Confirm your hose is genuinely intended to be capped rather than connected elsewhere before installing.

Installation
Push the cap onto the 3/4" hose end and secure with a hose clamp for a leak-free seal. Confirm hose diameter matches 3/4" before installing, since a mismatched size won't seal properly even with a tight clamp.

What is this cap used for?
This cap is used to seal an unused 3/4" heater hose connection, such as when deleting a heater core or simplifying custom cooling-system hose routing.

Is this the same as a radiator cap?
No — this is a hose block-off cap. It simply seals an unused connection and does not regulate cooling-system pressure like a radiator pressure cap.

What hose size does this cap fit?
This cap is designed for a 3/4" diameter heater hose connection.

Can this be used to cap off a radiator hose instead of a heater hose?
Potentially, provided the connection is the correct 3/4" diameter and the cap is rated for the application's coolant temperature and system pressure. Since main radiator hoses are typically larger than 3/4", verify the actual connection size before use.