The Rain Tight Monitoring Well Manhole allows access to monitoring/observation wells. Monitoring well markings, which comply with API RP 1615, are cast into the cover. The manhole features a cast iron ring and cover with machine fitted Buna-N O-Ring for rain tight security, steel skirt, 3/8″ flush mount stainless steel bolts for limited access and carries the H-20 load rating. The manhole is also available with a seamless pipe skirt welded to the cast iron ring (Model 103P).