G.A.S

IWS Flexible Water Tanks

£57.95
Tax included. Shipping calculated at checkout.
Please Select Tank Size: 100L
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Pickup available at Sheffield store

Usually ready in 1 hour

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Shipping & Returns

Our current shipping rates are as follows:

  • UK Orders Over £95.00 – Free Next Day Delivery
  • UK Orders Under £95.00 – £8.95 For Next Day Delivery With DX Or We Offer Tracked 48 & 24 Services With Royal Mail
  • UK Orders Next Day AM – £20
  • UK Orders Saturday AM – £30
  • International Orders DAP – We can ship worldwide - Please note that any customs fees, import taxes or duties are the responsibility of the customer.

All parcels are fully tracked. Once your order has been dispatched, you’ll receive an email containing your tracking number.

If your order is classed as an oversized item OR deemed extra heavy, additional heavy shipping duty will be added at checkout when selecting your shipping options.

Returns

We want you to be completely satisfied with your purchase, but if you change your mind, you may cancel your order within 14 days of receipt for a full refund, provided the items are unused and in resalable condition.

Once your cancellation has been confirmed, you must return the items within 14 days, ideally in their original packaging.

Click & Collect

Order online and collect directly from our Sheffield OR Barnsley store. Once your order is ready, you’ll receive an email or phone confirmation with collection details. Please wait for confirmation before travelling to ensure your order is prepared.

Please have your order number ready to give to a member of staff when you arrive.

Sheffield Store:
GSH Retail Ltd
Unit 5, 230 Woodbourn Road
Sheffield
S9 3LQ

Barnsley Store:

GSH Retail Ltd
Unit 6, Rockingham Business Park
Rockingham Row, Birdwell
Barnsley, S70 5TW

Local Same Day Delivery Service

Our man in a van!

Same-Day Delivery Service

Enjoy fast, reliable, and fully discreet same-day delivery with Green Spirit when you order from our Sheffield store area.Whether you shop online or
in-store, we make getting your items easy,convenient, and secure.

Order Online

When placing your order through our website, simply select the Same-Day Local Delivery option at checkout.

  • Free Same-Day Delivery on orders over £250.00
  • Available customers within a 3-mile radius of our Sheffield store (S9 3LQ)
  • Orders under £250.00 can still be delivered the same day for a £50.00
    flat fee

Your order will be prepared and delivered directly to your
door the very same day, using our discreet delivery service.

Order In-Store

If you prefer to shop in person, visit our Sheffield
location to browse, purchase, and arrange delivery.

  • Pay
    in full for your items in-store
  • Choose
    a delivery time and date that suits you best
  • Our
    team will ensure a smooth and convenient handover

Discreet Delivery Promise

We understand the importance of privacy.

  • All
    our delivery vans are plain and unmarked, with no company
    branding
  • Parcels
    are packaged in plain or black wrapping for complete discretion

Delivery Requirements

To ensure everything runs smoothly:

  • Customers
    must be present at the agreed delivery time
  • Drivers
    cannot wait for extended periods
  • If
    the customer is not available, items will be returned to the store and a £50.00
    redelivery fee
    will apply

Upon
delivery, we will request a order number, name and signature to
confirm receipt

Discreet Shipping

All orders from GSH Retail Ltd are packed securely and shipped in Plain unbranded boxes for your privacy. We understand that discretion is important, so no external markings or product details are visible on the packaging.

Each parcel is also wrapped in durable black film and sealed with fragile tape to ensure both security and protection in transit.

We take great care to make sure your order arrives safely, discreetly, and in perfect condition — every time.

Methods Of Payment

We accept a wide range of secure payment options for your convenience when shopping with GSH Retail LTD

You can pay using:

Visa, Mastercard, American Express, and Discover

Apple Pay, Google Pay, and Shop Pay

PayPal – Fast and secure online checkout with buyer protection

Klarna – Flexible payment options, including Pay in 3 instalments or Pay Later

Clearpay – Split your purchase into four interest-free payments

Weston Union– Supported for international customers

Cash In The Post - This is at your own risk! Please make sure it is signed for, tracked, and insured.

Manual Bank Transfer - Contact a member of staff to organise paying via bank transfer.

All transactions are processed securely through Shopify’s encrypted checkout. Your payment details are never shared directly with us.

Once your order is placed, you’ll receive an order confirmation email, followed by tracking details once your parcel has been dispatched.

Finance Options

We offer flexible finance options to make purchasing easier. You can choose to spread the cost of your order, all three options are interest-free and give you the flexibility to manage your payments in a way that suits you.

PayPal Pay in 3

PayPal Pay in 3 allows you to divide your purchase into three equal interest-free payments over two months. The first payment is made at checkout, followed by two automatic payments each month.
It is available on orders between £30 and £2,000, and approval is completed instantly through your PayPal account. You can view, manage, or make payments easily through the PayPal app or your online account.

Shop Pay

Shop Pay Installments lets customers pay for an order in smaller increments over time.When available, Shop Pay Installments is a great option to help you maximize your budget for orders between the following amounts, depending on your location:


Klarna


Klarna offers two flexible ways to pay. With Pay in 3 instalments, your order total is divided into three equal payments, taken every 30 days with no interest or fees when paid on time. Alternatively, you can choose Pay Later in 30 Days, allowing you to receive your order first and settle the balance within 30 days. Klarna provides instant approval at checkout, and all payments can be managed securely through the Klarna app.

Clearpay

Clearpay lets you spread the cost of your purchase into four equal interest-free payments, taken automatically every two weeks. The first instalment is paid at the time of purchase, and the remaining three are collected automatically over six weeks. Clearpay is available for orders between £30 and £1,000 and can be managed easily through the Clearpay app.

Important Information

All finance options are subject to eligibility and approval by the provider. Late or missed payments may affect your credit score, so please ensure funds are available when payments are due. For details about eligibility, limits, or payment schedules, please refer to the provider’s website or app.

Earning Points & Rewards

At GSH Retail we believe loyalty should be rewarded - Our Points & Rewards scheme allows you to collect points every time you shop and redeem them for discount codes to use on future purchases.

When you make a purchase through our website, you’ll automatically earn points based on the value of your order. These points are added to your account and can be saved or redeemed whenever you choose. Once you’ve collected enough points, you can exchange them for a unique coupon code that can be applied at checkout to reduce the cost of your next order.

Earn 5 Points for every £1 spent
Redeem 100 Points for £1 Store Credit

Your points never expire as long as your account remains active, and you can track your balance easily through your customer account dashboard. It’s our way of saying thank you for choosing GSH Retail Ltd

To redeem your points, simply log into your account, view your available balance, and follow the on-screen instructions to generate a discount code. Enter the code at checkout to instantly apply your reward.

Please Select Tank Size

IWS Flexible Tank – Collapsible Hydroponic Nutrient Reservoir 100L–1000L

The IWS Flexible Tank is a durable, space-saving water storage solution designed for hydroponic irrigation systems, nutrient reservoirs and automated watering setups. Available in five capacities from 100 litres to 1000 litres, these collapsible water tanks offer a convenient alternative to traditional rigid plastic reservoirs.

Designed to complement IWS Flood & Drain, Dripper and other compatible IWS irrigation systems, the IWS Flexible Tank provides dependable storage for water and hydroponic nutrient solutions.

Its innovative collapsible construction allows the tank to be assembled in minutes and packed flat when not in use, making it particularly useful for indoor growing environments where space, accessibility and flexibility are important.

Key Features

  • Genuine IWS flexible water storage tank
  • Available in 100L, 250L, 400L, 750L and 1000L capacities
  • Designed for hydroponic nutrient storage and irrigation
  • Compatible with suitable IWS Flood & Drain systems
  • Suitable for IWS Dripper and compatible automated watering systems
  • Durable flexible construction for dependable water storage
  • Collapsible design folds flat when not in use
  • Quick and straightforward assembly in minutes
  • Space-saving alternative to bulky rigid reservoirs
  • Easy to transport and reposition when empty
  • Suitable for use with compatible pumps, control units and pipework
  • Ideal for small, medium and large hydroponic installations
  • Practical for nutrient mixing and reservoir maintenance

Available IWS Flexible Tank Sizes

The IWS Flexible Tank range includes five capacities, allowing growers to select a suitable reservoir for their irrigation system and watering requirements.

Tank Size Capacity Typical Application
100L 100 Litres Smaller hydroponic systems and compact irrigation setups
250L 250 Litres Medium-sized IWS systems and nutrient storage
400L 400 Litres Larger automated irrigation and multi-pot systems
750L 750 Litres High-capacity nutrient storage and larger growing installations
1000L 1000 Litres Extra-large reservoirs and high-volume irrigation requirements

Please Note: Tank capacity should be selected according to the water consumption of your growing system, available floor space and required refill frequency.

Designed for IWS Hydroponic Systems

The IWS Flexible Tank is designed to provide a convenient water and nutrient storage reservoir for compatible IWS hydroponic irrigation systems.

It can be incorporated into suitable IWS Flood & Drain, Dripper and other automated feeding installations, supplying the stored nutrient solution required for scheduled irrigation.

When used as part of a complete system, the reservoir works alongside the appropriate pump, control unit, fittings and pipework to deliver nutrient solution to the growing containers.

Important: This product is the flexible reservoir itself. Pumps, control units, irrigation fittings and system-specific assembly kits may need to be purchased separately.

Ideal for IWS Flood & Drain Systems

In an IWS Flood & Drain system, nutrient solution is transferred from the reservoir to the growing containers at scheduled intervals.

Once the irrigation cycle is complete, the solution drains back through the system for recirculation, helping automate the watering process.

The IWS Flexible Tank provides a central reservoir for storing the nutrient solution used during these cycles.

Suitable for IWS Dripper Systems

The IWS Flexible Tank can also be used with compatible IWS Dripper systems, providing a convenient supply of water or nutrient solution for automated drip irrigation.

With capacities ranging from 100L to 1000L, the tank can be selected to suit the number of plants, watering frequency and overall irrigation requirements.

Space-Saving Collapsible Construction

Traditional rigid water tanks can be difficult to transport, move through narrow doorways or store when not required.

The IWS Flexible Tank offers a practical alternative thanks to its collapsible design.

When empty, the tank can be dismantled and packed flat, reducing the amount of storage space required and making transportation considerably easier.

This is particularly useful for growers who frequently change their growing layout or need to install a large reservoir in an area with restricted access.

Quick & Easy Assembly

IWS Flexible Tanks are designed for fast assembly, allowing growers to set up their water storage without the inconvenience of handling a large rigid container.

Once assembled and positioned on a suitable level surface, the tank can be filled and used as a reservoir for compatible irrigation equipment.

Always check that the tank is correctly assembled and all required fittings are securely installed before filling.

Durable Construction for Nutrient Storage

The IWS Flexible Tank is manufactured from durable, flexible material designed for storing water and compatible hydroponic nutrient solutions.

Its construction provides a practical balance of strength, portability and space-saving convenience.

Regular cleaning and inspection will help maintain the condition of the reservoir and reduce the build-up of nutrient residue.

Convenient Reservoir Management

The IWS Flexible Tank provides a central location for storing and preparing nutrient solutions before they are delivered through the irrigation system.

Depending on your setup, it can be used for:

  • Preparing and mixing hydroponic nutrients
  • Storing water for automated irrigation
  • Supplying compatible IWS control units
  • Maintaining a central reservoir for multi-pot systems
  • Supporting scheduled watering cycles
  • Reducing the frequency of manual reservoir refilling

Ideal Applications

  • IWS Flood & Drain hydroponic systems
  • IWS Dripper irrigation systems
  • Compatible IWS automated watering systems
  • Hydroponic nutrient reservoir storage
  • Multi-pot hydroponic installations
  • Recirculating irrigation systems
  • Indoor growing environments
  • Greenhouse irrigation
  • Large nutrient mixing reservoirs
  • Temporary or permanent water storage

Product Specifications

Brand IWS
Product Name IWS Flexible Tank
Product Type Collapsible Water & Nutrient Storage Reservoir
Available Capacities 100L, 250L, 400L, 750L, 1000L
Construction Durable Flexible Material
Design Collapsible / Flat-Pack
Assembly Quick Self-Assembly
Storage Folds Flat When Empty
Compatible Systems IWS Flood & Drain, Dripper and Other Compatible IWS Systems
Applications Hydroponics, Nutrient Storage and Irrigation

How to Choose the Right IWS Flexible Tank

When selecting a tank for your hydroponic irrigation system, consider the following:

  • Number of Plants: Larger growing systems generally require greater water storage capacity.
  • Irrigation Frequency: Systems with frequent watering cycles may require larger reservoirs.
  • Water Consumption: Choose a tank that provides enough nutrient solution between refills.
  • Available Space: Check the assembled tank dimensions against your available floor space.
  • System Compatibility: Ensure your pump, control unit and fittings are suitable for the chosen tank.
  • Maintenance Access: Allow enough room for filling, cleaning and inspecting the reservoir.

Top Tip: Consider selecting a reservoir with some additional capacity beyond your normal water requirements to provide flexibility when adjusting your irrigation schedule.

Installation & Maintenance Tips

  1. Choose a flat, level surface capable of supporting the full weight of the filled tank.
  2. Assemble the tank according to the supplied instructions.
  3. Check that the flexible body and supports are correctly positioned.
  4. Install any compatible fittings or system-specific pipework as required.
  5. Partially fill the tank and inspect for leaks before filling completely.
  6. Connect the reservoir to the appropriate IWS irrigation equipment.
  7. Check the system operates correctly before leaving it unattended.
  8. Clean the reservoir periodically to prevent nutrient residue accumulating.
  9. Empty, rinse and dry the tank before dismantling or storing it.

Important: Never attempt to move the tank while filled. Keep sharp objects away from the flexible material and ensure the supporting surface can safely withstand the weight of the water. A full 1000L tank contains approximately 1000kg of water, excluding the tank itself.