Frequently Asked Questions

Have a question? You'll likely find your answer here! If not, don't hesitate to contact us.

The downpipe filters collect approximately 90% of the water that flows down the downpipe. Water coming into the downpipe flows down the outside (of the inside) of the downpipe allowing for maximum collection.

The unique design of the downpipe filter means that when your tank is full, the water is pushed back along the downpipe filter and continues down the downpipe. There is no messy overflowing and no need to manually turn the diverter off when the tank is full.

This is a really difficult question to answer, how big is your garden? How often do you need to water your plants? How much rain will there be? How big is your roof? These variables will affect the answer.

We have had some great feedback from our customers that with a decent downpour the tank will fill in a matter of hours - makes you realise how much we are losing down our stormwater systems!

As these are 'sealed' units, insects such as mosquitoes and flies are unable to sit in the water and lay larvae.

The Rainwater tanks come as a complete kit and ship with everything you need to get it up and running. This includes a tap and downpipe diverter, the downpipe diverter also comes with a drill bit.

No problem, when you select your tank there is also an option to select whether your downpipes are round or rectangular. We will ship the tank with the appropriate connections.

In some of our tanks you could install a submersible pump to produce extra pressure rather than just relying off the gravity fed system. You could not install a submersible pump into the Rocky Wall or Amphora tanks as these are sealed units and there isn't access to place the pump in the bottom.

We understand completely that you may not want the hassle of installing your new Designer Water Tank, that is why we are working hard to develop partnerships with local providers that are happy to help. Where possible, these will be based on set pricing, so you know upfront what the cost will be

The tanks are made from 70% recycled Polyethylene (PE) plastic. They are 100% recyclable.

Our tanks are made in a state of the art factory in Germany. Graf own a significant share of Wilken Plastics Energy where it produces all process energy and heat in their own biogas plant. They shred, wash and dry recyclable plastics that are collected from Germany's "yellow bag" plastics collection system, among other sources ( ,Aug 2020)

Maintaining Your Rainwater Tank

Collecting precious rainwater from your roof and diverting it into a rainwater harvesting tank can provide you with a valuable source of water which can be used throughout your garden or for any other outside water use. Just a few simple steps can help keep the water flowing into the tank and reduce the amount of debris which can end up in the tank.

- Inspect your roof, gutters, and diverter once every 6 months.

- Remove any leaves, droppings, dead insects and the like from your roof and gutters.

- For the Speedy diverter clean out the little filter basket regularly. 

Other Maintenance Tips 

Cutting back nearby trees or branches that overhang your house will stop leaf accumulation and reduce any animal droppings and insects on your roof. If you are wanting to clean your roof, please ensure you detach the pipe from the diverter to your tank.

Cleaning your rainwater tank

It is a good idea once a year to drain your tank fully and clear out any sediment that may have built up in the bottom.

Step 1 - It is best to wait until after summer when the water level in the tank will be at it's lowest. 

Step 2 - Drain the tank - To do this simply empty the water from your tank using the tap. Once no more water is draining from the tap then you can disconnect it from the downpipe. When you have done this you can tip the tank on it's side and completely empty all the water.

Step 3 - Use a hose and perhaps a broom to loosen the debris in the bottom and then tip that out. When you have finished cleaning the tank connect it back up to the diverter and it is ready to fill again next time it rains.

How do I clean a tank without a lid?

You want to clean your tank, but it doesn’t have a lid? Don’t panic please watch the step-by-step explanatory video. 

How do i connect my above-ground tank to the downpipe?

Installation of the Speedy downpipe filter