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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 /> Riser Spacing <br /> Nv- <br />