Application: The GU INSIDE DROP INLET serves to overcome elevation differences between an incoming wastewater connection and the manhole base. This device reduces wastewater inflow energy and lessens turbulent entry into main channel flow, will reduce H2S emissions, odor and subsequent erosion / corrosion of manhole structure.

Design: Incorporates mounting flange and gasket to mount against the inside radius of the manhole riser. Available is an optional corrosion resistant F.R.P. Adaptor used with Rubber Boot Seal mounting for cored hole in Lined Concrete Barrel Riser and PVC / F.R.P. Pipe Riser Manhole.
TYPE 300 - Suitable for mounting in manholes, 42"*, 48" and 54"* Dia.
TYPE 370 - Suitable for mounting in manholes, 48", 54"* and 60" Dia.
*42" and 54" Diameter Manhole typical of insertion type Rehab Manhole Liner Systems

Construction: Molded Polyethylene.

Gasket: "O" ring design of polyisoprene 40-45 Durometer, approximately 1" diameter.

Mounting: Precast Concrete / Masonry Manhole: The GU INSIDE DROP INLET may be bolted to interior of manhole wall using four 3/8" dia. stainless steel wedge anchors or threaded stainless steel rod / epoxy bonded anchors PVC / F.R.P. Pipe Riser Manhole: The GU INSIDE DROP INLET is to be installed in a cored hole with the GU PIPE RISER BOOT SLEEVE ADAPTOR used to seat the "jack in place" flexible connector (rubber boot). The GU INSIDE DROP INLET may then be secured to interior of pipe riser using with four 3/8" dia. stainless steel bolt, nut and fender washer assemblies. Important note for precast concrete structures with integral liners or PVC / F.R.P. pipe riser manholes: All mechanical anchor attachments through liner surfaces or pipe riser must be sealed with an elastomeric sealant approved by the "liner manufacturer".

Inlet Connection:
Type 300 - Will accept either 4" 6" or 8" incoming line connected with flexible connectors (boot). Maximum diameter of cored hole is 12.1". It is recommended that an 8" cored hole be used for "jack in place" flexible connectors (rubber boots) on 4" inlets and a 12.1" cored hole be used for "jack in place" flexible connectors (rubber boots) on 6" an 8" inlets.
Type 370 -Will accept 6", 8", or 10" incoming line connected with flexible connectors (boot). Maximum diameter of cored hole is 14.5". It is recommended that a 10" or 12'' cored hole be used "jack in place" flexible connectors (rubber boots) on 6" and 8" inlets and a 14" cored be used for "jack in place" flexible connectors (rubber boots) on 10" inlets.

Drop Pipe Connection: Will accept bell and gasket end of 6" or 8" PVC SDR26 / SDR35 gravity sewer pipe and elbow as the vertical conduit inside the manhole structure to direct flow into manhole base main channel.

Cleanout / Inspection Cap: Threaded type, which may be modified to serve as a half dam by cutting out a "half - moon" shaped opening in upper half of the cap center. Take care not to damage cap threads. A stainless steel cable or chain may also be attached to cap and to one of the threaded wedge anchors to prevent accidental loss after installation. Note: Drop pipe, stainless steel wedge anchors / bolts, threaded stainless steel rod, epoxy anchor bond material, stainless steel cable / chain clamps, saddles, and elbows, to be supplied by others.