Liberty Access Riser for Pro370 & Pro380 Systems ARC-18 allows burial of the Pro370 & Pro380 Systems up to a maximum depth of 18" below grade. A convenient chamber for the pump's electrical and piping connections 1/2 out of sight and below grade. Riser simply slides over the sealed 370 and 380 systems. Cover is retained by 4 stainless steel bolts and has provision for padlock to deter unwanted entry. Weight: 28 lbs.- (Riser and Cover) Riser Height: 18-3/4"; Total Height with Cover: 20-1/2"; Diameter: 32"