check valve

The check valve, in case power plants shut off power, prevents water from flowing back into the aerator, thus preventing flooding .
It also protects against electric shock in the event of a sudden return of power. Fits standard 4/6mm aquarium hoses .

Product features:

• only allows air to pass in one direction
• prevents flooding
• long lifetime
• easy to install
• provides security

Dimensions: ​​​​​​​5 x 1 cm