IWS Trident Spares - Genuine Replacement Parts for Your Flood & Drain System
Best for: Existing IWS Trident flood & drain growers who need to replace a worn fitting, grommet or pot rather than buy a whole new system.
Our thoughts
Nobody gets excited about a bag of grommets, but this is the kind of listing that saves your grow when something small lets go mid-cycle. IWS parts are proprietary, so if a tee fitting splits or a grommet perishes, a generic irrigation part from the hardware shop won't fit. Keep one of these in the cupboard and you're never more than five minutes from a fix.
The IWS Trident is a hybrid flood & drain (ebb & flow) system: a Control Unit with a brain and timer pumps nutrient solution from a FlexiTank reservoir into 25mm IWS Pro Pipe, which bottom-feeds each Trident pot from below. A float valve in the Control Unit stops the fill once the pots reach the same height as the top float, so the system can't overflow, and gravity drains the solution back to the tank between cycles, pulling fresh oxygen into the root zone. Each pot has a cloth inner pot that sits on root rods at the base, which encourages roots to spread and air-prune rather than growing down and blocking the pipework.
This listing covers the small parts that keep that system running: Trident tee fittings, elbow fittings, rubber grommets, and inner/outer pots in 16L and 25L sizes. Everything here is sized to IWS's own 25mm push-fit pipework, so it only fits the Trident line — it isn't generic irrigation stock.
How it compares
There isn't really a "competitor" for Trident spares — the comparison that matters is genuine IWS parts versus everything else you might be tempted to bodge in.
- IWS Trident pipework uses proprietary 25mm push-fit tees, elbows and grommets that don't interchange with standard garden irrigation fittings, so a genuine spare is the only reliable fix if one fails.
- Compared with AutoPot's own spares (which use a different valve and 13mm/16mm pipe format), Trident parts are cut to different dimensions entirely — the two systems aren't cross-compatible even though both are UK-designed flood/drain-adjacent kit.
- Buying the single worn part here is a fraction of the cost of replacing a full Trident pot or Control Unit outright.
Cheap, specific, and exactly what you need when one part of an otherwise-working system gives up.
Usage guidance
This is a variant-select product — pick the exact part you need before adding to basket.
Working out what's failed
If a pot is flooding unevenly or leaking at a joint, check the rubber grommet first — it's the cheapest part and the most common point of failure. If a pipe run has cracked or come apart at a joint, you're looking at a tee or elbow fitting.
Swapping a fitting
Fittings are push-fit onto 25mm IWS Pro Pipe or 25mm ICE Tube — no glue or tools needed. Drain the system fully before disconnecting any pipework to avoid a mess.
Replacing a pot
Inner fabric pots and outer pots are sold separately in 16L and 25L sizes to match your existing system size — check which size your Trident units are before ordering, as the two aren't interchangeable.
Technical specifications
- Compatible system: IWS Trident Flood & Drain
- Pipe compatibility: 25mm IWS Pro Pipe / 25mm ICE Tube
- Parts covered: Trident tee fitting, elbow fitting, rubber grommet, inner fabric pot, outer pot
- Pot sizes available: 16L and 25L
- Fitting type: Push-fit, no tools required
- Grommet material: Rubber
- Fitting material: Rigid plastic (tee/elbow)
- Inner pot type: Cloth/fabric, sits on root rods for air-pruning
- Sold as: Individual variant-select spare parts
Who this is for
- Trident owners doing routine maintenance between grows
- Anyone who's had a grommet perish or a fitting crack mid-cycle
- Growers expanding an existing Trident setup with extra pots
- Second-hand Trident buyers wanting to replace tired components before running it
If you already run a Trident system, this is the listing you bookmark for when — not if — something small needs swapping out.
Our take
This is about keeping a good system running, not selling you a new one. IWS Trident is a well-regarded bottom-feed flood & drain design, and the parts that wear are cheap and simple to swap yourself — no need to call anyone out or replace a whole unit over a £3 grommet.
Pick the exact part you need from the variant list and you'll have your system back to full health for a couple of quid. Does exactly what it should, day in, day out.
