Product Information

Protect your CO2 system with the ISTA CO2 Check Valve (Black) IF-587. Designed to prevent water backflow, this essential component safeguards CO2 regulators and equipment from damage.

Its compact size and reliable sealing ensure smooth and uninterrupted CO2 flow while enhancing system safety.

Premium CO2 Backflow Protection for Planted Aquariums

The ISTA CO2 Check Valve (Black) IF-587 is an essential accessory for any pressurized CO₂ setup — especially for planted tanks and aquascapes. It’s designed to allow CO₂ gas to flow in one direction only, preventing water from siphoning back into the regulator or solenoid when the system shuts off.

Key Features

• One-Way CO₂ Flow: Prevents tank water from backing up into your CO₂ system, protecting solenoids and regulators.
• High Pressure Tolerance: With +100 psi resistance and an extremely low cracking pressure (~1 psi), it ensures reliable operation even at high CO₂ pressure.
• Inline Installation: Easy to add anywhere along the CO₂ tubing with standard connectors.
• Universal Compatibility: Works with all CO₂-resistant aquarium tubing types.
• Sleek Black Design: Blends seamlessly with black CO₂ lines for a clean aquarium setup aesthetic.

Why It Matters

CO₂ backflow can damage expensive equipment and disrupt dosing consistency — especially during power outages or when the solenoid turns off. A proper check valve adds a critical safety layer, extending the life of your CO₂ components and stabilizing plant growth.

Ideal For

This check valve is perfect for pressurized CO₂ systems in:

• Planted freshwater aquariums
• CO₂ reactors & diffusers
• Solenoid + regulator setups
• DIY and advanced aquascaping installations

A must-have safety accessory for any planted aquarium CO2 setup.