â¢Grooved plumbing allows for easy disassemling and reassembling of pipe and valvesâ¢Groove x Flange 1/2" plate (150lb pattern) 5" x 8" Long Sch10 SS304â¢Groove x Flange 1/2" plate (150lb pattern) 5" x 8" Long Sch10 Stainless Steelâ¢Flange 1/2" plate (150lb pattern x Groove Adapter Sch10 Stainless Steel SS304 5" flange x 5" x 8"Long Sch10 â¢Groove x Flange adatper 1/2" plate (150lb pattern) 5" x 8" Long Sch10 SS304.