Description
AquaOne Airline Check Valve - connect a check valve (one-way valve) to air-line tubing to prevent water back-siphoning down your air-line when there is a power outage. Back-siphoning is extremely dangerous and can ruin your air pump, empty your aquarium, damage your floors and create a shock hazard.
<strong>At a glance:</strong>
Small and Compact
Fits standard aquarium air-line 4mm inner diameter
Allows air to travel in one direction only.
Stops water coming back down the air tube
Easy to install - just cut the airline between the air stone and the air pump and insert check valve into air line
Aqua One Part number - 10121
Delivery Information
| Delivery Option | Price | Speed | Best For |
|---|---|---|---|
| Free Local Delivery (Thanet) | FREE | 1–2 working days | CT8, CT9, CT10, CT11, CT12 postcodes |
| Economy (Royal Mail) | From £2.99 | 2–3 working days | Small/light items |
| Standard Courier | From £6.50 | 1–2 working days | Most orders |
| Express AM | From £9.99 | Next working day (AM) | Urgent orders |
| Saturday Delivery | From £12.50 | Saturday | Weekend delivery |
| Pallet / Large Goods | From £65 / free on qualifying mainland UK orders | 2–6 working days | Aquariums & heavy items |
All orders are fully tracked. Next-day cut-off is 1pm. Scotland, Islands & Northern Ireland rates calculated at checkout.
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