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5 Best Drain Fly Killers of 2026

Last Updated - 2026/06/25

1
Best Choice

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Eco Strong

Drain Swarm Gel | Natural Fruit Fly, Drain Fly, Gnat, and Flying Pest Remedy: 64 Doses, 256 Fl Oz…

Eco Strong

CA$66.44

More Details
Main highlights
- Plumbing & Septic Safe: Drain Swarm can be used in any type of plumbing and in homes on a septic system.
- Easy To Use: Simply pour 4 oz into the drain daily for 5 to 7 days or until the problem is resolved.
- Drain Swarm Treatment Liquid Gel: Enzymes break down drain scum that can be fed on in sinks, garbage disposals and drains.
- Determine Which Drain To Treat: Consistently use the product in the drains that have the issues. This could be a kitchen drain, bathroom sink drain, shower drain or all of them at the same time.
- Commercial Use: Use this effective formula in bars, restaurants, commercial kitchens, soda fountains and more.
CA$66.44
2
Best Value

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Eco Strong

Drain Swarm Gel | Natural Fruit Fly, Drain Fly, Gnat, and Flying Pest Remedy: 64 Doses, 256 Fl Oz…

Eco Strong

CA$63.12

CA$66.44
(5% Off)

More Details
Main highlights
- Plumbing & Septic Safe: Drain Swarm can be used in any type of plumbing and in homes on a septic system.
- Easy To Use: Simply pour 4 oz into the drain daily for 5 to 7 days or until the problem is resolved.
- Drain Swarm Treatment Liquid Gel: Enzymes break down drain scum that can be fed on in sinks, garbage disposals and drains.
- Determine Which Drain To Treat: Consistently use the product in the drains that have the issues. This could be a kitchen drain, bathroom sink drain, shower drain or all of them at the same time.
- Commercial Use: Use this effective formula in bars, restaurants, commercial kitchens, soda fountains and more.
CA$63.12
CA$66.44 (5% Off)
3

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Eco Strong

Fruit Fly Drain Treatment | Drain Fly Eliminator | All-Natural, Eliminates Gnats, Sewer Flies and More - Works in All Drains (64 Oz)

Eco Strong

CA$49.97

More Details
Main highlights
- What to Expect: Some users commented that after the first treatment, they saw more flies. This is to be expected and means the product is working. The fly’s home is being destroyed, so the flies will come out of the drain. Continue to treat as directed. You will see a decrease over the next few days. Complete elimination can take longer.
- Home & commercial Use: The gel contains additional scum-busting properties making this the most effective solution. This treatment breaks up and digests drain scum. Pour into a drain daily until the flies are gone.
- Drain Flies, Sewer Flies, Gnats, or Fruit Flies: Flies that live and breed in drains, pipes, or garbage disposals will be eliminated. And it's safe for use on septic systems.
- Determine Which Drains The Flies Are Coming From: You must consistently use the product in the drains in which the flies live. This could be a kitchen drain, bathroom sink drain, shower drain, or all of them at the same time.
- A Natural Fruit Fly Eliminator: This non-toxic gel is safe for use in any drain in a home, kitchen, bar, or restaurant.
CA$49.97
4

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Eco Strong

Fruit Fly Drain Treatment | Drain Fly Eliminator | All-Natural, Eliminates Gnats, Sewer Flies and More - Works in All Drains (64 Oz)

Eco Strong

CA$47.47

CA$49.97
(5% Off)

More Details
Main highlights
- What to Expect: Some users commented that after the first treatment, they saw more flies. This is to be expected and means the product is working. The fly’s home is being destroyed, so the flies will come out of the drain. Continue to treat as directed. You will see a decrease over the next few days. Complete elimination can take longer.
- Home & commercial Use: The gel contains additional scum-busting properties making this the most effective solution. This treatment breaks up and digests drain scum. Pour into a drain daily until the flies are gone.
- Drain Flies, Sewer Flies, Gnats, or Fruit Flies: Flies that live and breed in drains, pipes, or garbage disposals will be eliminated. And it's safe for use on septic systems.
- Determine Which Drains The Flies Are Coming From: You must consistently use the product in the drains in which the flies live. This could be a kitchen drain, bathroom sink drain, shower drain, or all of them at the same time.
- A Natural Fruit Fly Eliminator: This non-toxic gel is safe for use in any drain in a home, kitchen, bar, or restaurant.
CA$47.47
CA$49.97 (5% Off)
5

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

MEGA-LABS

BIO-GEN Foam for Drains

MEGA-LABS

CA$37.50

More Details
Main highlights
- DRAIN FOAM CLEANER
CA$37.50

5 Best Drain Fly Killers of 2026

Drain Swarm Gel | Natural Fruit Fly, Drain Fly, Gnat, and Flying Pest Remedy: 64 Doses, 256 Fl Oz…

Drain Swarm Gel | Natural Fruit Fly, Drain Fly, Gnat, and Flying Pest Remedy: 64 Doses, 256 Fl Oz…

Fruit Fly Drain Treatment | Drain Fly Eliminator | All-Natural, Eliminates Gnats, Sewer Flies and More - Works in All Drains (64 Oz)

Fruit Fly Drain Treatment | Drain Fly Eliminator | All-Natural, Eliminates Gnats, Sewer Flies and More - Works in All Drains (64 Oz)

BIO-GEN Foam for Drains

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