Active Aqua Rubber Grommet, 1/2", pack of 25

Watertight Seal for DIY Hydroponic Connectors, 1/2"

A fitting that isn't fully sealed around its connector is one of the more common sources of slow leaks in a DIY hydroponic build, and a hardened or cracked grommet won't seal no matter how tightly the fitting is drawn down. This rubber grommet is sized for 1/2" connectors and forms a watertight seal at that connection point.

It also works as a direct replacement for an older grommet that has hardened, cracked, or lost its seal with age. Sold in a pack of 25 for builds or repairs with multiple connection points.

Key Features & Benefits

• Watertight Seal — Forms a tight seal around 1/2" connectors to prevent leaks.
• Replacement Use — Suitable for replacing worn or older grommets in existing systems.
• Pack of 25 — Sold in a pack of 25 for systems with multiple connection points.
• DIY System Compatible — Sized for use in DIY hydroponic system builds.

Who Should Use This Grommet

Growers building or maintaining DIY hydroponic systems with 1/2" connectors, or replacing grommets that have hardened or cracked with age, will find this useful.

About Active Aqua

Active Aqua is a hydroponic hardware and equipment brand distributed by Hydrofarm, covering reservoirs, pumps, and grow system accessories.

Frequently Asked Questions

What connector size is this grommet for?

This grommet is sized for 1/2" connectors, forming a watertight seal at that connection point. Using the wrong size grommet can leave gaps that leak under pressure.

How many grommets come in a pack?

Each pack contains 25 grommets, which is enough for builds or repairs across multiple connection points. Buying in a pack keeps spares on hand for future maintenance.

Can this replace an existing grommet?

Yes, it works as a direct replacement for a worn or older grommet that no longer seals properly. Grommets that have hardened or cracked with age are a common source of small leaks.

When should I replace a grommet?

Replace a grommet as soon as you notice a slow leak, visible cracking, or hardened rubber around a fitting. Waiting can let the leak worsen or let the fitting itself loosen over time.

Is this grommet meant for DIY systems?

Yes, it is sized for use in DIY hydroponic system builds where growers are assembling their own reservoirs, fittings, and connections. It is not a proprietary part tied to one specific system.