Miller Environmental sand filter liners are manufactered to be buired, useing the most suitable material,for this application. Our sand filter liners have many benifits verses PVC. Our liners can be made in one seamless piece and shipped directly to the job site within 7 days plus transit. It is also a much stronger material and is less expensive and installs faster as well as staying in place were it belongs because it is a ridgit material. See specification information listed below.