ProfessionalToilet Supply Line Swap

The braided or plastic supply line running from the shut-off valve to the toilet tank is under constant water pressure and ages out like any other component. Replacing it — especially if it's original to an older home — eliminates a common source of slow leaks under the tank and gives you piece of mind.

Also known as: toilet supply line swap, toilet water line replacement, toilet supply line replacement, toilet fill line, toilet connection hose, bathroom supply line, toliet supply line

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What you get

What’s included

Shut off toilet supply valve and flush tank empty
Remove old supply line from both the valve and tank fill valve
Install new braided stainless supply line
Reconnect and check both ends for leaks at full pressure
Confirm fill valve and flapper are also functioning normally

Simple & stress-free

How it works

Shut off and drain

We close the supply valve, flush to empty the tank, and loosen the fittings at both ends of the old supply line.

Install the new line

We thread the new braided line onto the fill valve inlet at the tank and the supply valve stem, tightening hand-firm plus a quarter turn.

Restore and check

We open the supply valve, let the tank fill, and visually check both fittings and the line itself for any sign of moisture.

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Problems we fix

Old plastic supply lines that have hardened and cracked, dripping onto the floor
Corrugated metal lines that have developed pinhole leaks at the crimped ends
Supply valve that won't close fully during the swap — a common discovery in older bathrooms
Line that leaks at the fill valve because the plastic nut was overtightened and cracked

Good to know

Toilet Supply Line Swap — FAQ

How often should toilet supply lines be replaced?

Plastic lines should be replaced every 5 years as a preventive measure. Braided stainless lines last longer but should still be replaced if the toilet is renovated or if any moisture is detected nearby.

What length supply line do I need?

Toilet supply lines are typically 12–20 inches depending on how far the valve is from the tank. We measure and cut or select the right length before starting.

What if the supply valve under the toilet is stuck or corroded?

A valve that won't close is a safety concern — it means you can't isolate the toilet in an emergency. We flag this and can replace it during the same visit using the main house shutoff.

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