Pacific Interlock Pavers Inc. is committed to preserving our natural resources which has led to a major breakthrough in paving stone production - Hydro-Flo (tm) Technology. It is the ONLY TRULY PERMEABLE (no gaps) concrete paver. With 100 surface permeability our patented pavers are strong enough to withstand residential and commercial use and look good.Why should we specify Hydro-Flo pavers rather than a poured concrete or another non-permeable surfaces including standard paversEnvironmental AdvantagesThe permeability based on the annual rainfall in the specified area can well be over 80000 gallons per 10000sf area each year.Many communities have well over a 100000sf of Hydro-Flo Permeable pavers installed already which means they have the potential to keep over 800000 gallons on-site replenishing local aquifers thus keeping pollutants out of storm drains and away from our streams and ocean.Safety BenefitsOur Hydro-Flo Permeable pavers exceed all ADA standards for pavers including slip-resistance friction/skid resistance plus there are no large gaps/spaces between our Hydro-Flo pavers to cause problems for wheelchairs walkers and high heels and they require far less maintenance than the gap style.