Drainage FAQ’s


How do I know which drainage is best suited for my project? 

We suggest it is best to look at how much water the area tends to receive, as well as considering the environment that is around it. Is it on a slope? Is it near a pool? Do you live near the ocean? All aspects need to be taken into consideration to ensure not only the grate is appropriate, but the channel too.

What are the different flow rates for the different grates?

Standard Polymer Grate – 417L/min/metres
Pressed Stainless Grate – 458L/min/metres
Pressed Galvanised Grate – 230L/min/metres
Heel Friendly Polymer Grate – 175L/min/metres
Edge Grate – 149L/min/metres

This all depends on a range of different variables, but if we make a like-for-like comparison assuming a 1 in 200 site gradient and catchment area of 250m² 

What are the different waterflow and rainfall capacities?

TechnoDRAIN & EvoMAX – high
Standard Channel – medium to high
Compact Channel – medium to low
Edge Channel – medium to low

How to remove the grate from EasyDRAIN?

For cleaning and maintenance purposes, grates can only be removed if they have been installed using a suitable expansion material. To remove grate, place the tip of a screw-driver into the flange, where the grate and channel connect. Gently push the edge of the channel outwards until the grate pops out. Repeat this for each flange along the channel.

How to remove the grate from EasyDRAIN if it is REALLY stuck?

In some unfortunate cases, the above method to remove the grate may not work. This will usually occur when the channel has been installed without an expansion material. In some circumstances the grate may need to be broken in order to remove it. If this occurs you are able to purchase replacement grates from any of our retailers.

How do you install EasyDRAIN against pre-existing concrete?

We recommended that you dig your trench with enough room for drainage plus an additional 15-20mm below surface level, pour concrete into the base of the trench and place in EasyDRAIN Channel and Grate, push the channel and grate down into the concrete, allowing for excess concrete to push up the side of the channel away from the existing concrete.

How do you install EasyDRAIN into a concrete driveway?

In order to make room for the drainage, if there is no way to put it at the end of the existing driveway – you will have to physically remove existing concrete by using a jackhammer or seeking advice from a qualified professional

How do you join EasyDRAIN to a pit?

Our Rainwater and Stormwater pits are designed so that you can insert PVC into any side of the pit as there is no specified cut out design on the pit itself. This means that you can determine where the pit needs to go and using the underside of the EasyDRAIN Channel or a Slim Pit you are able to connect a pipe via the designated cut out space. To cut into either the Channel, Slim Pit or Rainwater/Stormwater Pit we suggest using a hole saw

How do you cut and re-join EasyDRAIN lengths?

Remove the grate from the channel and flip the channel over to reveal the underside. Using a saw, cut between the ribs that are 200mm from the female end. Trim with a utility knife so they are neat. Place grate back on channel and mark out the area needed to cut continue to cut the grate. Connect the male and female ends together by pushing the male end down into the female end until it clicks into place. For further information please refer to the EasyDRAIN Installation instructions.


TechnoDRAIN & EvoMax –

Can installation be a one person job?

Yes, EvoMax and TechnoDRAIN are lightweight products and only require one person to install

Can you install a channel drain without using concrete?

No, you must incase your drainage in concrete. Especially when larger drainage such as TechnoDRAIN and EvoMAX are used for commercial instances and for vehicles to drive over. If not encased in concrete, you can break the drainage, limit the effectiveness and/or cause serious injury.

What is the difference between Class B and Class D?

Class B refers to areas (including footways and light tractor paths) accessible only to vehicles (excluding commercial vehicles) or livestock (light duty). Class D refers to carriageways of roads and areas open to commercial vehicles.


Rainwater Pits –

When should I install a rainwater pit?

Most common applications for installing a rainwater pit is where surface water is collecting or as a collection point from roof drainage

Is there a risk microparticles from the polymer will enter the waterways?

No, microparticles will not come off the polymer when moulded correctly. If you cut the plastic for pipe connections ensure you have cleaned the plastic shavings to ensure they don’t enter waterways.