Description
Sand (silica) in its different forms (sand, silex, gravel) is the oldest natural available granular filtration media. Even today, the use of sand remains popular for the treatment of municipal water in very big open gravity filters, in swimming pool filters and in pressurized filters for the treatment of ground water.
In a lot of groundwater applications the use of sand has been replaced with other granular filtration offering more benefits (faster flow rate, better quality of filtrate, lower in weight, etc.)
Sand is present in nature all over the world, washed and sieved. It exists in different grades that vary from one supplier to another. It is used for the removal of suspended solids, but can also be used to filter of oxidized iron or manganese.
A pressurized sand filter always contains different layers of sand, going from relatively fine sand on top to coarse gravel as a support layer. In between the use of 2 more particle sizes is common.
jamatos2008 –
Great tires that last a long time and are super puncture resistant. Not super light but they work fine for commuting.
kmn96 –
These tires roll smooth and quite fast. I like the multiple layers of protection. These are now my favorite tires.
ThePoolCleaners customer –
Very happy with the purchase, the product is very good and it arrived quickly.also good priceI will buy again
Dr P. –
Superb product, new tire and inner tube.Great above via the chat function.Happy cyclist
Timea G. –
IT was super easy to replace tires and the quality of it just amazing. Could feel the difference during cycling.
ThePoolCleaners customer –
I have bought these tyres before and they are great at reducing punctures. Very pleased with purchase and price
wilhob-62 –
Great tyre. I always buy these for my ebike. They last a long time and are great for not getting punctures.
Eric –
Ive been riding this tire in different widths for years on touring bikes. Havent found anything better.
nikopolal –
Replacement combo after 18K kms end of my 20 years old world tour Marathon XR tire. Except as much of it.
tony j. –
MIxed, road, off road and cycle track. These tyres seem to be exactly what I need and so far great.