IWS Copper Discs — Root Control Barrier for Flood & Drain Systems
Best for: IWS system owners looking to prevent root blockages and maintain reliable drainage performance
Our thoughts
If you're running an IWS system, these aren't optional—they're a smart investment in system longevity. Stops roots tangling into your pipework before it becomes a problem. Simple, proven, works every time.
IWS Copper Discs are a root control barrier designed specifically for IWS flood-and-drain systems. Placed copper-side up at the bottom of your inner pot, they prevent roots from growing downwards into the drainage pipework whilst encouraging lateral root development through natural air pruning. It's a straightforward fix to a real problem—blocked systems cost time and money. These discs stop it happening.
How it compares
Root control discs exist across different hydroponic systems, but the IWS copper disc is engineered for precise fit:
- System-specific sizing — engineered to fit IWS pots exactly, not generic alternatives
- Copper coating provides both mechanical barrier and natural antimicrobial properties
- Air prunes roots rather than killing them — encourages healthier root structure within the pot
- Significantly cheaper than dealing with a blocked system mid-cycle
AutoPot systems use gold-coated alternatives, but those won't fit IWS pots. This is the right disc for the right system.
Usage guidance
Installation is straightforward — takes seconds and requires no special knowledge:
Installation
Place the disc flat at the bottom of your IWS inner pot, copper side facing upwards, before adding your growing media. That's it.
How it works
As roots grow downwards, they contact the copper surface and naturally stop growing in that direction. Instead, they develop laterally within the pot, creating a stronger root mass that stays contained. No roots escaping into your pipes. No blockages.
Sizing
IWS Copper Discs come in three sizes to match your pot type. The 170mm disc fits Culture and Aqua pots. The 250mm disc fits the Punched Pot. The 320mm disc is cut for 25-litre Flood and Drain inner pots. Check your pot type before ordering—the fit needs to be correct.
Replacement cycle
Over time, the copper coating wears. If you're seeing roots getting past the barrier, it's time to replace. Most growers swap them out every two to three years depending on usage intensity.
Technical specifications
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Available sizes: 170mm (Culture/Aqua pots), 250mm (Punched Pot), 320mm (25L Flood & Drain inner pots)
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Material: Copper-based coating with mechanical barrier and antimicrobial properties
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Function: Air prune roots at pot base, prevent downward growth into drainage pipework
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Installation: Place flat at bottom of inner pot, copper side up, before adding media
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Compatibility: IWS system components only — not compatible with AutoPot or generic systems
Who this is for
- Existing IWS system owners maintaining or replacing worn discs
- New IWS buyers sourcing complete system component lists
- Growers experiencing blockages or drainage issues in flood-and-drain setups
- Anyone running multiple pots where root management directly impacts system reliability
- Operators who want to prevent expensive downtime caused by clogged pipework
Essential for anyone serious about keeping their IWS system running smoothly long-term.
Our take
This is a no-nonsense piece of kit that solves a real problem. Root blockages in flood-and-drain systems aren't rare—they're inevitable if you're not managing them. The copper disc stops it before it starts, and the price is so reasonable it'd be daft not to have them fitted when you set up or swap them out when they wear.
Good time to stock up on the right size for your system. Does exactly what it should, year in, year out.
