Profile: Schier Products Co. manufactures grease interceptors & oil separators, solids interceptors, chemical waste tanks & systems and specialty plumbing products. We offers 22 complete series of grease interceptors and oil separators in both fabricated steel and seamless polyethylene. We also manufacture a variety of Solids Interceptors in steel, stainless steel and seamless polyethylene. Our specialty plumbing products include stainless steel drains and cleanouts, HDPE valve boxes, access covers and frost sleeves.