Why a Type I product saves you money and ensures compliance over a Type M product
The only product of its type to carry the Kitemark. FastFlow products offer effective drainage systems, produced at the F&H foundry in the UK, catering for both surface and sub-surface drainage.
A type I can be laid in conjunction with standard parapet and surfacing materials. This gives a massive saving in both weight and cost of high strength concrete.


Saving You Money While Complying
To be sure that you are installing a product that has the lowest cost over its lifetime, is environmentally sustainable, meets the loading requirements under all conditions and will still be providing a trouble free drainage solution in fifty years, insist on a TYPE I Ductile Iron system.
Calculations based on 240mm wide x 100mm deep water channel, standard unit.
D400 Compliant at the point of purchase. No specific installation required to meet the loading
A typical type M unit requires approx 250 Kgs of high strength concrete haunching per metre to have any chance of complying with a D400 loading. It is the responsibility of the contractor to install exactly to the manufacturers detail to ensure compliance against standard, EN1433 states that;
“For type M drainage channels the manufacturer shall provide instructions for specific haunching and indicate dimensions x, y and z. The support needed on site shall be at least the support used for the loading test. A type M can be heavier.”
A type M unit can be heavier per metre once encased in concrete; the cost of the concrete is high both in environmental and monetary terms. Type M units rely on using the correct installation detail to ensure compliance to standard. The sustainability of these types of units is questionable when all these factors are considered.