IWS Flexi Tank with Pipes & Pump

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  • Flexi Tank – a brilliant solution for water storage
  • The perfect accompaniment to IWS setups
  • Packs flat for easy transportation and storage
  • Can be used in places that rigid plastic tanks won't go
  • Easy to assemble – takes minutes

IWS Flexi Tank with Pipes and Pump

Easy to store, transport, set-up and use – the Flexi Tank is one of those great ideas that was bound to happen sooner or later! The Flexi Tank packs up flat and can be set up in minutes making it far more convenient than any rigid plastic tank – brilliant!


Please note: Our grow systems are designed to provide years of trouble free use, having undergone rigorous testing and development. However, at One Stop Grow Shop, we believe that it's good practice to take a few simple precautions that will reduce the risk of leakages to practically zero. For complete peace of mind, secure pipework that's joined onto barbed fittings using jubilee clips or cable ties, and place run-off trays / floor secure sheeting underneath the system & reservoir. It's much better to be safe than sorry.

Hose clip for use with 13mm flexi pipe

Hose clip for use with 25mm pro flexi pipe

Run-Off & Work Trays

Floor Secure Sheeting


How the IWS Flexi Tank Works

This kit contains everything required to install a Flexi Tank for use with an IWS set-up, including irrigation fittings, flexi pipe, pump and power connection.

Rigid plastic reservoirs can be awkward to store, transport and get into certain places. The Flexi Tank is a simple and elegant solution to those problems. The main tank fabric is made from thick, strong and flexible material with a zippered lid and the whole thing folds up flat, like a tent, for easy storage. The five support legs slide easily into ready-made vertical slots in the fabric and hold the Flexi Tank in shape vertically.



1 x Flexi Tank waterproof fabric reservoir, support legs, irrigation fittings, Maxi-Jet MJ1000 and power cable, flexi pipe FILL and DRAIN connections

How to Use the IWS Flexi Tank

Unroll the Flexi Tank fabric and slide each of the support legs up into the vertical slots located around the side-wall. Next you will need to fit irrigation fittings to the 2 holes in the top of the Flexi Tank, in order to connect up the rest of the tank assembly.

If the irrigation fitting glands are supplied screwed together, unscrew them, leaving only the rubber seal on the main threaded cylinder. Push the threaded cylinder through one of the holes in the top of the Flexi Tank, so that the flanged end and the rubber seal sit on the outside of the tank. The sealing nut can then be screwed into place from inside the tank. The two elbow connections can now be screwed on to either side of the irrigation fitting gland. Repeat the process so that you have an irrigation fitting gland on each of the Flexi Tank's 2 holes.

The corresponding pieces of flexi pipe can now be fitted to the tank. Pipes marked FILL and DRAIN can be connected to the two elbow connections on the outside of the tank. The MJ1000 pump's pre-attached length of flexi pipe can then be connected to the same irrigation fitting gland as the FILL pipe. The shortest length of pipe is to be connected to the same irrigation fitting as the DRAIN pipe.

For more information on how to utilize Flexi Tanks from this point on, take a look at our instruction guides for the IWS kits.


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