CLR Power Plumber Drain Opener box, pressurized, 15 uses, CFC-free.

Back of CLR Drain Opener box with drain usage instructions, warnings, and manufacturer details shown.

Child in bathtub washing toy under running faucet. Text: THINGS HAPPEN! Safe for most plumbing clogs.

CLR Power Plumber infographic with 3 illustrated steps and a clean bathroom photo in the background.

Old and new CLR drain opener packages side by side with an arrow showing the packaging update.

Drain Opener

Clears even the toughest clogs instantly and will not harm sound plumbing.

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Overview

Ingredients

Instructions

Unclogs drains in seconds.
Clears even the toughest clogs instantly and will not harm sound plumbing.
Contains up to 15 applications in each can.
Environmentally safe and contains no harsh acids, additives, lye, or CFC’s.

What’s great about it

EPA Safer Choice Certified
80% Plant Based Ingredients
100 uses... and counting! Explore How-Tos

Available Sizes4.5 oz

UPC: 0-78291-77284-5

Name

CAS

USE

1,1-Difluoroethane

A colorless gas used as a propellant for aerosol sprays and in gas duster products. As an alternative to chlorofluorocarbons, it has an ozone depletion potential of zero and a lower global warming potential.

This product was determined not to be Subject to Disclosure under the California Cleaning Products Right to Know Act.

Download Safety Data Sheet

Blocked Sinks and Tubs

Fill sink with enough water to submerge can’s cap.
Block overflow with damp rag or sponge and hold firmly.
Place can’s cap over drain opening and press firmly for one second. Repeat if necessary.

Slow-Moving Drains

Place stopper in drain.
Fill sink or tub with 6-7” of water, remove stopper.
Block overflow with damp rag or sponge and hold firmly.
Place can’s cap over drain opening and press firmly for one second. Repeat if necessary.

Double Sinks

Place stopper in sink and hold.
Follow the same directions as a blocked sink.

Explore our How-to Video Library

Frequently asked questions

How does Drain Opener work?

Drain Opener is a compressed gas. When the formula in the can is released and comes in contact with water in your drain, it expands rapidly, creating a standing wave. It uses the water in your pipe as a battering ram pushing the blockage through and cleaning the walls of your pipes.

How many applications are in a can?

There are up to 15 applications in one 4.5 oz. can of Drain Opener. Do not hold down can for more than 1 second. If you push down longer then less will be available for use.

What kind of clog will Drain Opener work on?

Drain Opener will work on any clog, including hair, grease, food particles and soap build-up.

How far down will Drain Opener work on a clog?

50’ down a 1.5” diameter pipe, 40’ down a 2” diameter pipe, 35’ down a 3.5” diameter pipe, 25’ down a 4” diameter pipe, 18’ down a 5” diameter pipe

Will Drain Opener harm my pipes?

Even with the capability of cleaning a blockage up to 50 feet away, you can be assured that any sound plastic or metal pipe will not be subject to danger.

Does Drain Opener work on slow moving drains?

Yes! Drain Opener works great on this annoying problem. Simply follow the directions for a blocked drain (as stated on the box or can) ensuring that you fully submerge the green cap in water. Then give Drain Opener a slightly longer application. Your drain will run freely once again.

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