CO₂

LGND Sapphire™ Glass Check Valve

High-quality glass

Prevents the bubble counter from running empty

Suction cups are included

Visually very appealing

£ 10.99 (incl. VAT)

EUR: 12.79€

LGND Sapphire™ Glass Check Valve is a compact one-way non-return valve designed for aquarium CO₂ and air-line systems.

When system pressure falls or stops, the internal valve closes automatically, helping prevent aquarium water from siphoning backwards into the CO₂ regulator, solenoid valve, cylinder or air pump. Its transparent glass body and sapphire-blue internal mechanism provide a clean, discreet appearance while allowing easy visual inspection.

Suitable for planted aquariums, CO₂ injection systems and conventional aquarium air pumps.

Material: Glass | Colour: Transparent with sapphire-blue internal valve | Dimensions: 10.5 × 1.2 × 1.2 cm

Rinse the glass check valve with warm water before installation. Attach compatible 6 mm (1/4") standard airline tubing or 4/6 mm CO₂ tubing to both ends of the valve.

To attach tubing to the glass connections, wet the inside of the tubing with water and carefully slide it over the glass. The use of other lubricants is not recommended, as these may cause the tubing to slide off too easily.

Install the check valve upright and inline with the tubing outside the aquarium. CO₂ or air should enter through the lower connection and exit through the upper connection towards the bubble counter, diffuser or air stone, as shown in the diagram.

When removing the tubing, never pull or twist it directly from the glass. Instead, carefully cut the tubing lengthwise along the attachment point to release the glass connection and avoid breakage.

Once securely installed, turn on the CO₂ supply or air pump. Confirm that gas is flowing in the correct direction and check that all connections are secure.

LGND Sapphire™ Glass Check Valve Diagram

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›What does LGND Sapphire™ Glass Check Valve do?

It allows CO₂ or air to flow towards the aquarium while helping prevent water from travelling backwards through the tubing when system pressure stops or decreases.

›Which way should the valve be installed?

Install it with the CO₂ or air entering through the lower connection and exiting through the upper connection towards the aquarium.

›Where should I position the check valve?

Position it outside the aquarium, between the CO₂ regulator or air pump and the bubble counter, diffuser or air stone. Keep it dry and accessible for inspection.

›Can it be used with an aquarium air pump?

Yes. It can help protect compatible air pumps from water back-siphoning during a power interruption or when the pump is switched off.

›What tubing can I use?

Use correctly sized aquarium CO₂ or airline tubing that fits securely over the glass connections. For CO₂ systems, pressure-resistant CO₂ tubing is recommended.

›Will the valve reduce CO₂ pressure?

A correctly installed valve should permit normal gas flow. If the flow becomes restricted, check the installation direction, tubing, regulator pressure and diffuser for blockages.

›Does it require cleaning?

Inspect the valve periodically for water, deposits or restricted movement. If cleaning is necessary, disconnect and depressurise the system first. Rinse carefully with clean water and allow it to dry completely before reconnecting.

›What should I do if water has passed beyond the valve?

Immediately turn off the CO₂ supply or air pump, disconnect the system and inspect the valve, tubing and connected equipment before restarting.

For aquarium use only. Keep out of reach of children. This item is fragile. Use care when handling and removing suction cups and/or hoses. Dispose of broken glass in appropriate container.

Intended exclusively for aquarium CO₂ and air-line systems.

220172

LGND Sapphire™ Glass Check Valve

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220172

LGND Sapphire™ Package

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