top of page

Cover Systems

Std Duty Interlocking Cover Photo #1.jpg

Aluminum Flat Panel Cover Systems

Pleasant Mount Welding, Inc.'s aluminum covers are an attractive and structurally sound alternative to traditional aluminum diamond plate cover systems. We offer two different aluminum flat panel cover systems, a Standard-Duty Interlocking Cover and a Heavy-Duty Plank Cover. Utilizing custom extrusions, we can create fixed and hinged cover panel configurations for a variety of uses including odor control, protection from contaminants, and preventing UV exposure. We create innovative aluminum covers that offer cost-effective, long term solutions for architectural, municipal, and industrial storage applications. Our flat panel covers are widely used in the water and wastewater industries due to their chemical resistance, minimal lifetime maintenance requirements, and low construction cost. Every PMWI aluminum cover is custom designed in accordance with specific project specifications and engineered to meet any snow, wind, and suspended load requirements. Pleasant Mount Welding, Inc.'s competitive advantage is our quality reputation, unmatched experience, and the fact that we provide the complete package - we design, engineer, detail, and fabricate all of our covers in-house.

Heavy-Duty Plank Covers

Cover Installation Photo 4.jpg

Standard-Duty Interlocking Covers

Standard-Duty Interlocking Cover

Flush Mount Installation Demo Video

**** (Click on the YouTube icon at top of page to see all PMWI videos) ****

Aluminum Covers


Sludge Holding Tanks


Odor Control

Reservoir Tank Covers

Grit Chambers


Storage Vessels

Aeration Basins


Water & Wastewater Applications

  • Great for odor control

  • Easily customized to conform around penetrations or equipment

  • Substantially air tight enclosure

  • Reduced air volume for reduced air filtration costs - saving you energy

  • Hinged panels for access to areas below covers

  • Flat covers for heavy foot traffic and frequent access to equipment

  • Low deflection, non-skid walking surface

  • UV Protection and keeping out contaminants

Flat Cover Features

Removable Cover Panels  

Cover Panel Sealing Gaskets

Reduced Air Volume

Integral Slip Resistance

Low Deflection

Extruded Handles

Low Maintenance

Top or Flush Mounted

Modular Design

NEBB Leak Test Certified

Water & Wastewater Reservoir Covers


The public's growing concern for clean water is pushing governments to implement legislation regarding water quality and municipal practices for protecting our environment.  Storage facilities are being required to cover finished water reservoirs to help keep out contaminants. Our team of specialized engineers are experienced in creating custom solutions for covering clarifiers, reservoirs, sludge holding tanks, and many other storage facilities with our innovative aluminum covers. Our cover hinges allow for easy access to weirs, basins, blowers and any other equipment located below the covers. Our flat panel covers provide great odor control and a safe working environment for plant operators. PMWI aluminum covers require little to no lifetime maintenance - this results in lower plant preservation costs and frees up valuable plant resources. Our covers are very durable and strong enough to handle large loading requirements, allowing for safe navigation throughout the plant.

Aluminum Flat Panel

Cover System Accessories


Check out our product line for any accessories you need for your project. We are the complete package when it comes to wastewater facility renovations or new plant construction.

Bar Grating   Plank Grating   Handrails

Platforms & Walkways   Stairs

Standard-Duty Interlocking Covers

Std Duty Interlocking Cover Photo #2.jpg

Standard-Duty Interlocking Cover Features:​

  • ***************** Patent Pending *****************

  • Double-Interlocking Construction

  • 6" Wide Extruded Deck Planks

  • Designed for 50 PSF Uniform load & 400 LB      Concentrated load

  • Removable Hinged and Non-Hinged Cover Panels

  • Slide Latch Assembly to secure panels to Interlock Beams

  • Santoprene gaskets for a Substantially Air Tight Cover

  • Interlock Handles

  • NEBB Leak Tested & Certified 

  • Flush or Top Mount Configuration

  • Foamular® 250 Rigid Foam Insulation Option              (Check with PMWI for Availability)**

** Standard-Duty Aluminum Interlocking Cover system shall maintain an air intrusion leakage rate not to exceed 0.2 cfm per square foot at an applied negative pressure of 0.2 inches of water column.

Heavy-Duty Plank Covers

End Door 380P1 v14.jpg

Heavy-Duty Plank Cover Features:​

  • Welded Construction

  • 8" Wide Extruded Deck Planks with 2" Spaced I-Bars

  • Designed for 100 PSF Uniform load & 300 LB Concentrated load

  • Hinged or Fixed Cover Panels

  • Slam Lock with Key for Hinged Covers

  • Neoprene Gaskets for a Substantially Air Tight Cover

  • Lifting Handles

  • Flush or Top Mount Configuration

Std Duty Interlock Close Up.jpg
HD Plank Close Up.jpg

Hartford, CT WPCF Wet Weather Expansion Project
Product: PMWI Heavy Duty Plank Cover System

Serving the Water and Wastewater Industry for over 40 years!

Benefits of Aluminum

Ease of Maintenance

Corrosive Resistance

Aesthetic Appearance

High Strength-to-Weight Ratio



View Our Aluminum Flat Panel Cover Brochures

PMWI_Standard-Duty Aluminum Cover_Brochure_Cover Page_3-14-2024.jpg

Standard-Duty Interlocking Covers

HD Aluminum Cover Brochure_REV 1_Page_1.jpg

Heavy-Duty Plank Covers

For more information regarding our design & engineering capabilities, click here.

Copyright © 2020 Pleasant Mount Welding, Inc.

45 Dundaff Street

Carbondale, Pa 18407

Phone: 570-282-6164

Logo5_Rev 1.png
bottom of page