Air Pump Manifold for Charles Austen ET Pumps — Stainless Steel Multi-Outlet Air Distribution
Best for: Growers running deep water culture, multi-reservoir setups, or anywhere you need to split air from one pump to multiple airstones
Our thoughts
This is proper British engineering. Individual valve control on each outlet means you're not stuck with a basic splitter — you can fine-tune air flow to each stone independently. Pair it with a Charles Austen ET pump and you've got a quiet, reliable aeration system that'll run for years without fuss.
The Charles Austen Air Pump Manifold is a stainless steel multi-outlet manifold designed specifically to work with Charles Austen ET and Super Silent pumps. It does one job properly: splits the output from a high-capacity air pump into multiple 4mm airline connections, each with its own independent control valve. This means you can run anywhere from 6 to 18 airstones off a single pump, and adjust air flow to each stone individually — no guesswork, no blocked lines, no uneven oxygenation.
Built in stainless steel, not plastic. That matters. Plastic manifolds corrode, degrade, and leak. This won't. It's engineered to work continuously in hydroponic systems where reliability isn't optional.
How it compares
Manifold options range from cheap plastic splitters to precision-engineered metal control systems.
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Budget plastic manifolds: Affordable upfront, but they degrade in nutrient-rich water and offer no flow control — you're either on or off
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Charles Austen stainless steel: Higher initial cost, but individual valve control per outlet, zero corrosion, built to run 24/7 for years
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Integrated pump manifolds: Some commercial pumps come with manifolds built in, but you lose modularity and upgradeability
If you're serious about deep water culture or running multiple reservoirs, the Charles Austen manifold is the sensible choice. You're not paying for a brand — you're paying for engineering that won't let you down.
Usage guidance
Deep water culture systems
Connect the large outlet of your Charles Austen ET pump to the manifold inlet using the supplied L-shaped rubber tubing and clips. Attach 4mm airline to each outlet you're using. Run airstones submerged in your nutrient tank. Open the valves you need, leave the rest closed. Each valve controls flow to one stone independently.
Multi-reservoir setups
Run one pump with a manifold to service multiple tanks. Each outlet can feed a separate reservoir or stone. Adjust valve position to balance air flow across systems — handy if one tank needs more agitation than another.
Sizing the manifold to your pump
Charles Austen ET30 pumps work well with 6-way manifolds. ET40 with 12-way. ET60 with 18-way manifolds. If you're running multiple pumps, you can use multiple manifolds — two ET60 pumps can feed two 18-way manifolds for up to 36 airstones. Keep airline runs as short as practically possible; longer lines reduce air pressure and efficiency.
Maintenance
Check that valve stems move freely. If an outlet gets blocked or pressure drops unevenly, it's usually old airline tubing — replace it. Stainless steel doesn't corrode, so the manifold itself will outlast the rest of your system.
Technical specifications
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Material: High-grade stainless steel
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Outlet diameter: 4mm (inner diameter, barbed fittings)
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Available sizes: 2-way, 6-way, 8-way, 12-way, 18-way configurations
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Valve type: Individual open/close valves on each outlet for independent air flow control
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Inlet connection: Large diameter outlet (compatible with Charles Austen ET and Super Silent pump outputs)
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Installation: Push-fit into supplied L-shaped rubber tubing, secured with two metal clips
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Corrosion resistance: Stainless steel — no rust, no degradation in hydroponic environments
Who this is for
- Growers running deep water culture systems with multiple airstones
- Multi-reservoir operators who need one pump to service several tanks
- Anyone upgrading from single-stone setups to larger-scale aeration
- Professional and commercial growers requiring 24/7 reliability and precision control
- Charles Austen ET pump owners who need to convert the large outlet to standard 4mm airline compatibility
- Growers who've had plastic manifolds fail and want something that won't let them down
Our take
This is proper kit. British-engineered, built to last, and designed to give you actual control over air distribution — not just a basic splitter. If you're serious about hydroponic aeration and don't want to replace manifolds every couple of years, this is worth the investment.
Good time to buy while stock lasts. Pairs perfectly with a Charles Austen ET pump for a quiet, reliable, fully controllable aeration system.
