Plastic Air Manifolds – 4mm Airline Splitters for DWC
Plastic Air Manifolds – 4mm Airline Splitters for DWC
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Description
Run several airstones from one pump outlet
Plastic manifolds split a single air line from your pump into multiple outlets, letting one strong pump feed several airstones or diffusers across a multi-bucket setup. They are the simplest way to scale aeration in DWC and RDWC systems without buying a separate pump for every container.
Key Benefits
- Multiple outlets from one air line, splitting a single feed across several sites
- Push-fit connections for standard 4mm airline tubing
- Even airflow distribution - every outlet draws from the same pump, so buckets aerate equally
- Durable plastic build that stands up to constant grow-room use
Uneven oxygen across a multi-bucket system?
Running individual pumps often leaves some buckets better aerated than others, and the bucket that falls short on airflow is where roots turn brown and growth stalls first. A manifold fed from one capable pump spreads oxygenation evenly, so every root zone gets the same feed.
How to Use
- Connect the inlet to your air pump with a length of 4mm air line
- Run a separate line from each outlet to its own airstone or diffuser
- Check each outlet delivers a steady stream of bubbles and size the pump to the number of stones
- Block off any unused ports so pressure is not wasted
Technical Specifications
- Type: plastic air / nutrient manifold
- Use: splits one air pump line between several air stones
- Also suits: spreading nutrient solution in NFT systems
- Connection: push-on airline spigots
- Airline: not included
| By size | 6 Outlet | 10 Outlet | 20 Outlet |
|---|---|---|---|
| Outlets | 6 | 10 | 20 |
| Inlet | 8 mm | 8 mm | – |
| Outlet size | 4 mm | 4 mm | – |
Questions & answers
What airline do they take?
Standard 4mm airline, which push-fits onto the inlet and each outlet. We stock 4mm air line to match.
How many outlets can I get?
6, 10 or 20 outlets, all fed from a single pump line.
How do I connect it?
Run 4mm air line from your pump to the inlet, then a separate line from each outlet to its own airstone or diffuser.
What should I do with spare outlets?
Block off any unused ports so pressure isn't wasted, and size the pump to the number of stones you're running.
Can I get them delivered?
Yes. Orders over £60 get Free Express Delivery to the UK mainland, arriving in 1–2 working days when you order by 3pm Mon–Fri.

FREE Express Delivery on orders over £99. We aim to post same day on Express Delivery — order by 3pm Mon–Fri — and delivery takes 1–2 working days. A few harder-to-stock or large, bulky items can take a little longer — we'll tell you if that applies to your order. Heavy-item surcharges are always shown at checkout before you pay — we only ever charge what delivery costs us. Prefer to collect? Free pickup at our Wembley store.


