TERRO® Drain Insect Killer

$15.99
Model
T590
TERRO® Drain Insect Killer 1 5 5 1
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  • Breaks the life cycle of drain flies, fruit flies, house flies, and roaches
  • Eliminates insect infestations and prevents new ones from forming
  • Dry foam formulation ensures thorough drain coverage
  • Extension tube allows for precision application
  • Can be used on all types of pipes

TERRO® Drain Insect Killer

TERRO® Drain Insect Killer is a powerful solution that targets insects in your drain, including drain flies, fruit flies, house flies, and roaches. It works by using three Insect Growth Regulators to break the insect lifecycle, stopping the infestation in its tracks. The dry foam formulation reduces the chances of missed areas and provides complete drain coverage for effective insect control.

Targets drain insects

Targets Drain Insects

TERRO® Drain Insect Killer contains three Insect Growth Regulators (IGRs), which disrupt the normal development of immature drain flies, fruit flies, and roaches. Additionally, it disrupts the normal life cycle of drain flies and fruit flies, effectively eliminating them during their pupal stage, thereby breaking the cycle of infestation.

Dry Foam Formulation

TERRO® Drain Insect Killer features a unique, dry foam formulation that expands to provide full-contact, 360-degree drain coverage. This allows you to reach areas that liquid drain products can’t, making it highly effective in tackling and preventing insect infestations. The visible foam also ensures that no areas are missed during application.

Dry foam formulation
Easy to Use

Easy to Use

Apply TERRO® Drain Insect Killer into and around the downspout and catch basin. It's important to thoroughly coat these areas, as fly larvae develop in the scum buildup on the sides of drainpipes. When treating a double-basin sink, apply it in both drains. The fold-up extension tube allows for precise application into the pipes. Reapply every 2 to 4 weeks depending on the severity of the infestation.

TERRO® Drain Insect Killer Details

Do you want to know more helpful details about the TERRO® Drain Insect Killer? Take a closer look at the in-depth specifications for this product.

TERRO® Drain Insect Killer
Model # T590
Active Ingredients (S)-Hydroprene, Novaluron, Pyriproxyfen
Eliminates Drain flies, fruit flies, house flies, and roaches
Usage Notes Can be used on all types of pipes
TERRO® Drain Insect Killer
Model Number T590
Active Ingredients
  • (S)-Hydrprene
  • Novaluron
  • Pyriproxyfen
Eliminates
  • Drain flies
  • Fruit flies
  • House flies
  • Roaches
Usage Notes Can be used on all types of pipes

Customer Reviews

5
5 out of 5 stars
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1 Reviews
100% of customers
recommend this product
5 stars 1 (100%)
4 stars 0 (0%)
3 stars 0 (0%)
2 stars 0 (0%)
1 star 0 (0%)
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We were infested with drain ...
5
Aug 23, 2025
We were infested with drain flies with one application of terro they were eliminated. I am so satisfied with the product I had to give a 5 star review
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Q&A

How long should you let this sit after applying it, before you run water in the sink?
Question by: Angela on Jul 24, 2025, 7:18 PM
Wait 15 minutes before running water after applying TERRO® Drain Insect Killer.
Answer by: Brandon (Admin) on Jul 25, 2025, 10:23 AM
Aerosol cans need to be upright to use all the contents. The nozzle is too short to hold the can upright and still reach into drains Is a nozzle extender available?
Question by: Joanne on Nov 22, 2025, 11:58 AM
Yes — the can comes with a fold-up extension tube which acts as a built-in nozzle extender so you can apply the foam deep into the drain pipe.
Answer by: Walter Sandoval (Admin) on Nov 24, 2025, 9:07 AM
I used product yesterday and saw decrease of drain gnats.How soon can I use it again if I feel it necessary ?
Question by: Pat on Dec 2, 2025, 11:24 AM
Hi, thank you for reaching us. Depending on the severity of the infestation, it's recommended to repeat the application every 2 to 4 weeks.

Answer by: Guillermo (Admin) on Dec 2, 2025, 3:13 PM
Will this powder clog the drain?
Question by: Tammy on Aug 21, 2025, 4:20 PM
Hi, thank you for reaching us. This is a dry foam product that will not clog the drain. Just need to apply it in the sink downspout and catch basin, allow at least 15 minutes or until the foam dissipates before running water down the drain.
Answer by: Guillermo (Admin) on Aug 21, 2025, 4:39 PM
I used Terro Drain insect killer last night in my kitchen double sink. I left it overnight. When should I run the water to rinse out the sink and disposal? Are there any benefits to leaving it overnight? The disposal has a removable rubber gasket that may have Product behind it. If I remove it using rubber gloves can I safely clean it using only water? Does water effectively remove the produce from my sinks?
Question by: David on Oct 1, 2025, 2:20 PM
Thank you very much for contacting us. It would be our pleasure to assist you. The Terro Drain Insect Killer features a dry foam formulation that ensures thorough 360-degree coverage inside drains, helping eliminate and prevent insect infestations.

After application, we recommend waiting at least 15 minutes or until the foam dissipates before running water down the drain.

If product residue remains behind the removable rubber gasket, it is safe to clean using water and rubber gloves. Water is effective in rinsing away the product from sinks and disposals.
Answer by: Karla (Admin) on Oct 1, 2025, 3:10 PM
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