You're right to be cautious. Even if the customer says it's okay to remove the pipe, you need to consider a few things

1. Verify the Pipe's Purpose and Contents:
Is it really unused? Just because the boiler is out of commission doesn't guarantee the pipes are completely empty or safe. There could be residual water, chemicals (like rust inhibitors), or even oil in the system. What kind of pipe is it? Steel pipe can rust and corrode, making it difficult to cut and potentially creating hazardous dust. Copper pipe can be easier to work with but still requires proper handling. Is there any insulation? Older insulation (especially asbestos) can pose a significant health risk if disturbed. Look for crumbly, white/gray insulation. If suspected, DO NOT touch it. Call a licensed abatement company.2. Confirm Boiler Decommissioning



Ask for documentation

If the customer says the boiler system is decommissioned, ask for any paperwork confirming this. This could be a removal permit, a certificate of decommissioning, or documentation from a previous contractor.

Visual Inspection

Look for signs that the boiler system was properly drained and disconnected from its fuel source (gas or oil). Were the fuel lines capped? Was the boiler drained? Is there evidence of leaks or spills?

3. Potential Hazards and Mitigation



Asbestos

This is the biggest concern with old boiler systems. As mentioned above, If there's any doubt about the insulation, treat it as asbestos until proven otherwise.

Residual Chemicals

Even if the boiler is drained, there may be chemicals left in the pipes. Wear appropriate personal protective equipment (PPE) – gloves, eye protection, and a respirator – when cutting the pipe.

Rust and Scale

Rust and scale inside the pipes can be irritating and potentially hazardous to breathe. Use a dust mask or respirator when cutting and cleaning the pipes.

Water

There's almost always some water trapped in old heating systems. Have buckets and rags ready to catch any spills.

4. Recommended Procedure


Consult a Plumber or HVAC Professional

Seriously consider having a licensed plumber or HVAC technician assess the situation. They'll be able to definitively tell you what the pipe is, what it contained, and how to safely remove it. This is especially crucial if you suspect asbestos.2.

Document Everything

Take pictures and notes of everything you see before you start any work. This can be helpful if any issues arise later.3.

If You Proceed (with expert advice)



Shut off any valves

Locate and close any valves that might isolate the section of pipe you need to remove.

Drain the pipe

Carefully drill a small hole at the lowest point of the pipe to allow any remaining water to drain out. Have a bucket ready.

Cut the pipe

Use a pipe cutter or saw designed for the pipe material. Be careful to avoid creating sparks if working near flammable materials.

Cap the ends

If the pipe is still connected to other parts of the system, cap off the cut ends to prevent leaks or contamination.

Clean up

Properly dispose of any debris, including insulation and rust. Follow local regulations for disposal of potentially hazardous materials.

5. Liability and Permits



Liability

Make sure your insurance covers you for this type of work. Removing plumbing systems can be risky, and you want to be protected if something goes wrong.

Permits

Check with your local building department to see if you need a permit to remove the pipe. Some jurisdictions require permits for plumbing or heating system modifications.

In summary:

While the customer may be okay with you removing the pipe, your responsibility is to do so safely and legally. It's best to err on the side of caution and consult with a qualified professional before proceeding. Spending a little extra money upfront to ensure the job is done right can save you a lot of headaches and potential liability down the road. Make sure to get written confirmation from the customer that they are aware of the risks and responsibilities, and that they are waiving any claims against you for issues related to the boiler system. Flag for review