PVC water discharge lay flat hoses are used in all sorts of industries requiring the removal of water. PVC can be classified into multiple classes which are closely related to price. For example, the lower the price the lighter, thinner the wall and compounding will be. Entry level blue layflat hoses are designed for residential, temporary, or standby applications – it is not a lay flat hose designed for rugged applications. The NL2418 is similar to blue in construction but has a higher working pressure and slightly heavier properties, and moving up into our NL2420 or NL2425 ContiTech Spiraflex, these PVC hoses are designed for more industrial applications. For truly heavy duty, abusive applications, refer to our Urethane or Rubber Water Discharge hoses.