1″ Rubber Grommet

These rubber grommets are used to create secure, leak-free connections between various pieces of hydroponic equipment and plumbing.

This Ring shape item creates a seal so that water cannot leak from a tank, the most common issue with grommets are over time they get brittle and have the tendancy to leak, replacing these perodiaclly will insure that you never have to worry about a water leak.