Should I replace my own toilet supply line?

Replacing a toilet supply line is a manageable DIY project for most homeowners, but success depends on your comfort level with basic plumbing and having the right tools. The job typically takes 30-60 minutes and involves shutting off water, disconnecting the old line, and installing the new one.

The process itself is straightforward. First, turn off the water supply valve behind the toilet and flush to empty the tank. Disconnect the supply line from both the shut-off valve and the toilet tank using an adjustable wrench. When installing the new line, hand-tighten the connections first, then use a wrench to snug them down - but don't overtighten as this can crack the plastic tank or damage threads. Braided stainless steel supply lines are the best choice as they're more durable than plastic and less likely to burst than rubber lines.

In Ottawa, supply lines cost $15-40 at hardware stores, making this an affordable DIY project. However, if your shut-off valve is old, corroded, or starts leaking when you disconnect the line, you'll likely need a plumber to replace it. The biggest risk is water damage if connections aren't properly tightened or if you accidentally damage the toilet tank threads.

Consider calling a professional if you discover the shut-off valve needs replacement, if you're not comfortable working in tight spaces behind the toilet, or if you notice any other plumbing issues while doing the work. A plumber can typically replace a supply line in 15-20 minutes for around $150-250 including the part.

Before starting, test your shut-off valve by turning it off and on to ensure it works properly - this is your safety net if something goes wrong during the replacement.