Active Aqua 3/4" Stopper, Pack of 10

Clean Dead-End Cap for Hydroponic Tubing, 3/4"

Capping off the dead end of a hydroponic tubing run with tape or an improvised plug is a leak waiting to happen. The Active Aqua Stopper caps the end of a tubing run cleanly, stopping flow and sealing the line without the workarounds growers sometimes resort to.

This 3/4" stopper matches 3/4" tubing used across reservoirs, drip systems, and nutrient delivery lines.

Key Features & Benefits

• Sized to a specific tubing diameter — matches the stopper to the tubing rather than forcing a universal fit.
• Push-fit installation — no tape, clamp, or tool required for a standard install.
• Clean, leak-resistant seal — stops flow at a dead-end line without improvised plugs.
• Pack of 10 — covers multiple lines or repairs across a reservoir or drip system without reordering.

Who Should Use This Stopper

Growers capping off dead-end tubing runs — a line that's been shortened, a branch that's no longer used — are the fit for this stopper.

About Active Aqua

This stopper is part of Active Aqua's tubing-hardware line, one segment of the plumbing fittings and connectors Hydrofarm distributes under the brand.

Frequently Asked Questions

What tubing size does this 3/4" stopper fit?

It's sized specifically for 3/4" tubing. Using it on a different diameter line won't give a reliable, leak-free seal at the dead end.

How does the push-fit installation work?

Push the stopper into the open tubing end until it seats fully, with no tape, clamp, or tool required. A properly seated stopper resists pull-out under normal reservoir pressure.

When would I need a stopper instead of a cap fitting?

Use a stopper anywhere a tubing run simply needs to dead-end, such as an unused branch or a line that's been shortened. It's a simpler solution than routing an unused line to a valve or cap fitting that serves no other purpose.

How many stoppers come in a pack?

Each pack contains 10 stoppers. That's usually enough to cap several dead-end lines across a reservoir or drip system without a separate reorder.

Can I remove and reuse a stopper later?

Yes, if you later extend that line again, the stopper can be pulled out and the tubing reconnected to a fitting instead. The stopper itself can be reused on another dead-end line if it's still in good condition.