Mastering the art of replacing a steam radiator

How to Replace a Steam Radiator | Ask This Old House · 8:30 · Video: This Old House · Watch at the source

In short: Plumbing expert Richard Trethewey demonstrates the precise steps required to swap out an old steam radiator for a correctly sized replacement, ensuring a secure and functional connection.

The process begins with safety, as the steam boiler must be switched off to avoid scalng risks. Using tools like pipe wrenches and a spud wrench, the project involves loosening the radiator nut—carefully biting the nut in three corners to prevent deformation—and removing the old unit.

To ensure a leak-proof system, the video shows how to apply pipe dope and wicking to threads when connecting the floor to the hand valve and the valve to the spud. For a successful installation, the hand valve must be positioned parallel to the floor.

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