18" Access Riser with Lid Liberty's new ProSeries Access Riser is a convenient chamber for all your pump's electrical and piping connections-out of sight and below grade. The Access Riser simply slides over the sealed Pro370 or Pro380 system. The cover is retained by 4 stainless steel bolts and features a twist-lock design with provision for padlock to deter unwanted entry. Liberty Pump ARC18 Features: Liberty Pump ARC18 Specifications: