Monitoring/Observation Well Manholes

Monitoring/observation well manholes are designed to be installed at grade level over a slotted PVC monitoring well where limited access and clear identification are essential.

Download the Monitoring Observation Well Manhole Catalog Page

104AOW-1200

104AOW-1200

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  • Features
  • Ordering Specifications
  • Replacement Parts
  • Downloads

Features

  • DO NOT FILL” Graphic Warning Statement - Permanently cast into cover with black equilateral triangle inset into a white background in accordance with API Recommended Practices 1615.
  • Secure Cover - Two recessed, self-aligning stainless steel bolts with O-rings secure cover to the body ring.
  • Prevention Against Surface Water Contamination - A gasket located in the ring prevents contamination from rain water or during washdown.
  • Maximum Load Bearing Capacity - Cast iron covers and body rings are heavily ribbed to ensure maximum load bearing capacity.
  • Trouble-Free Installation - Sturdy steel skirts extend nearly a foot below grade to ensure trouble-free installation even in deep concrete.
  • Optional Skirts - Extend a full 19-1/4" below grade in 12" and 18" diameter models for sandy soil locations.
  • Unpainted Covers and No Bolt-Down Provisions Available - On the 104MW for monitoring well applications where limited access is not required.
  • Full-Size Internal Diameters for Maximum Access and Working Area.
  • Highway 20 Rated (H20) - All OPW spill containers and manholes exceed the requirements of the Highway 20 rating.
  • Individually Boxed for Ease of Handling.

Materials

  • Body ring: cast iron
  • Cover: cast iron
  • Skirt: steel (104 AOW)
  • Gasket: neoprene

Ordering Specifications

Product Number ID (in.) ID (mm) lbs. kg
104AOW-0800 8 203 15 6.8
104AOW-1200 12 305 28 12.7
104AOW-1219 12 305 33 15
104AOW-1800 18 457 50 22.7
104AOW-1819 18 457 57 25.9

 

Dimensions

Product Number A B C
in. mm in. mm in. mm
104AOW-0800 8" 203 10-1/8" 257 11-1/4" 286
104AOW-1200 12" 305 14-1/4" 362 11-1/4" 286
104AOW-1219 12" 305 14-1/4" 362 19-1/4" 489
104AOW-1800 18" 457 20-1/8" 511 11-1/4" 286
104AOW-1819 18" 457 20-1/8" 511 19-1/4" 489

Replacement Parts

Part # Description
E00514I Cover for 8" 104AOW-0800
E00515I Cover for 12" 104AOW-1200
E00514I Cover for 8" 104MW-0800
E00516I Cover for 18" 104AOW-1800
H12872M Gasket for 104AOW 8"
H12873M Gasket for 104AOW 12"
H12874M Gasket for 104AOW 18"