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against the vertical wall of the mounting ring. Both of these water -shedding covers are <br />protected by raised mounting rings. <br />• Fastener Options - Two types of fasteners are available to secure the manhole lid and <br />monitoring port to mounting rings. Standard are 5/16"-18 hex head bolts. Optional are <br />POMECO/OPW Roto -Lock Fasteners. The POMECO/OPW Roto -Lock system enables a <br />secure, watertight connection without the need to locate threaded bolt holes on the mounting <br />ring. <br />• Custom Multi -Port Manholes - Contact your POMECO/OPW representative <br />• Powder Coated Rings & Covers - Available upon request. <br />• Replacement Covers - See POMECO Part Number Configurators in the Online Folder <br />password protected section of the website. <br />Riser Spacing <br />