HM Electromech Packaged Metering Manholes (PPM) offers a complete solution to monitor influent or effluent flow in municipal and industrial applications. Made of fiberglass reinforced plastic (FRP),  packaged metering manholes are lightweight, corrosion resistant, watertight, structurally strong, and built to meet the stringent ANSI / ASTM D-3753-99 “Standard Specifications for Fiber-Reinforced Manholes”.

Each packaged metering manhole comes complete and ready for immediate installation.

A complete  metering manhole includes:

Integral flume for flow measurement
Choice of cover styles
Pipe adapters
Fiberglass access ladder with stainless steel reinforced, photo luminescent rungs
NPT coupling for wiring and tubing access
Integral Floor and base mounting flange

Dome top packaged metering manhole with integral Palmer-Bowlus flume being installed

All of the packaged metering manhole pieces are glassed together. There are no joints or seals to allow for the inflow of water into the manhole. This watertight integrity can result in substantial saving on sewer bills. Additionally, a packaged metering manholes weighs approximately 1/10th of a traditional concrete manhole, minimizing the amount of manpower and machinery need to the install the unit.

Flumes
Almost all sizes and styles of flumes manufactured by us can be fitted to a packaged metering manhole.

Simply choose the flume that best fits your flow rates and flow stream composition. Flumes available for integration are:

Parshall - Palmer-Bowlus - Trapezoidal - H-Type - Montana

Covers
We offer the largest number of standard covers to complete your packaged metering manhole.
 

Standard cover options include:

Dome Top Style

Greatest access to manhole interior
Stainless steel lockable hasp
Stainless steel piano hinge
Locking lift arm
Available for 4’-0”, 5’-0”, and 6’-0” manhole diameters
Intended for non-traffic / non-pedestrian applications

Aluminum Hatch Style

Steel and aluminum construction available
Water tight or non-water tight
Available with custom engraving, spring assists, and multiple lock configurations
Available for 4’-0”, 5’-0”, and 6’-0” manhole diameters
Intended for pedestrian loading or low profile applications


H-20 Highway Traffic Loading Style

22 ½” and 31 ¾” openings
Conforms to AASHO H-20 Axial Loading specification
Available for 4’-0” and 5’-0” manhole diameters
Intended for road, highway, or parking lot use
Ready for customer supplied grade ring and cover
Optional composite manhole cover
Standard stainless steel pull-up ladder assist (depths of 4' and greater)