Cast Iron Radiator Removal Guide: Safe DIY Steps & Costs

Cast iron radiators are heavy and in the way — or they're about to be. Whether you're upgrading to forced-air heating or renovating a century home, removing old radiators is a serious job that pays off in scrap metal value. Here's what to know before you start.

What Is a Cast Iron Radiator Worth as Scrap?

Cast iron pays roughly $0.06–$0.12/lb at Toronto-area scrap yards in 2026. A single 6-section radiator weighs 100–150 lbs. A 12-section unit can hit 250–350 lbs. A whole house full can be 1,000–3,000+ lbs — potentially $100–$360 in scrap value from material just taking up space. Surface rust and old paint are expected and don't affect price.

Why People Remove Cast Iron Radiators

• HVAC upgrades — switching to forced-air or heat pump systems
• Renovation — radiators take up wall space and make rooms harder to furnish
• Building conversion — commercial to residential, or suite metering changes
• Boiler failure — if the boiler dies and isn't being replaced, radiators become dead weight

Safety and Prep Before Removal

Turn off and drain the system first. The boiler must be off and fully drained before you touch any radiators. A live steam or hot water system contains enough pressure and temperature to cause serious burns. Drain from the lowest drain point on the system.

Let the system cool completely. Wait at least an hour after shutting off a boiler before working near radiators.

Have towels and a bucket ready. Even a "drained" system holds residual water. Expect spillage when you disconnect.

Step-by-Step Radiator Removal

Step 1: Shut Off the Supply Valve

Each radiator has a supply valve near the floor. Turn clockwise to close. For two-pipe systems there may be a return valve on the other end — close both.

Step 2: Bleed the Radiator

Open the bleed valve near the top (radiator key or flathead screwdriver) to release residual pressure. Have a small container ready — water will drip out.

Step 3: Disconnect the Supply Pipe

Use a pipe wrench on the threaded union connecting the supply pipe to the radiator inlet. Turn counterclockwise. Bucket first — expect residual water.

Step 4: Cap the Open Pipe

Cap the open pipe with a threaded cap to prevent debris entering the system if the boiler stays active elsewhere in the building.

Step 5: Move the Radiator

A 6-section radiator weighs 100–150 lbs. Do not attempt alone. Use a dolly, get 2–3 people for large sections. Protect floors with cardboard — cast iron will scratch hardwood with zero hesitation. For sections that won't fit through doorways, disassemble using a radiator nipple wrench.

Disposal Options

Free scrap metal pickup: Get radiators to ground-level access and free pickup handles the rest. A full house removal is 500–2,000+ lbs — well worth scheduling.

Sell for reuse: Ornate antique radiators with decorative feet and scrollwork have a market among heritage home restorers. Check salvage shops or Facebook Marketplace before scrapping.

GTA scrap yards: Take them with a truck — low per pound, but large quantities add up.

Summary

Cast iron radiators are worth $0.06–$0.12/lb as scrap. Low per pound, but their weight means real money on whole-house removals. Drain the system, let it cool, get help moving them. Free pickup available for accessible loads.