0 item(s)
View cart
You have no items in your shopping cart.
Monitoring Manhole Cover, Round 3" x 6" Bolt-in Lid
The Koby Environmental MH36 is a compact 3" x 6" monitoring manhole cover with a bolt-in lid. Designed for small-diameter monitoring wells and piezometers where a full-size manhole is unnecessary....
$ 31.13
Monitoring Manhole Cover, Round 8" x 12" long metal skirt
The Martin Products MWL8012SM is a 8" monitoring well manhole cover with a long galvanized steel skirt. Provides traffic-rated access protection for groundwater monitoring wells. The extended skirt height accommodates...
$ 125.00
Monitoring Manhole Cover, Round 8"x12" Black Ductile Steel
The EMCO Wheaton A0721-108 is an 8" monitoring well manhole with a black painted ductile iron bolt-down lid and galvanized steel skirt. The steel skirt provides rigid support in granular...
$ 91.47
Monitoring Manhole Cover, Round 8" x 8", 3-Bolts
The EMCO Wheaton A0721-308 is an 8" monitoring well manhole with a 3-bolt lid configuration and white painted ductile iron lid. The 3-bolt design provides secure closure with faster access...
$ 78.09
Monitoring Manhole Cover, Round 8"x 8" long plastic skirt
The Martin Products MWL8075PL is a 8" monitoring well manhole cover with a long polyethylene skirt. Provides traffic-rated access protection for groundwater monitoring wells. The extended skirt height accommodates deeper...
$ 90.91
Cast Iron Manhole Cover, Round 18"x18", Lay-In, Steel Skirt
The EMCO Wheaton A0717-018A is a 18" round manhole with a Cast iron lid and galvanized steel skirt. The lay-in lid drops into the frame without bolts for quick, unrestricted...
$ 300.71
Monitoring Manhole Cover, Round 18" x 12", Cast Iron Lid
The EMCO Wheaton A0717-018 is a 18" round manhole with a Cast iron lid and galvanized steel skirt. The lay-in lid drops into the frame without bolts for quick, unrestricted...
$ 279.67
Monitoring Manhole Cover, Round 12" x 24", Cast Iron Lid
The EMCO Wheaton A0717-122A is a 22" (12" lid) round manhole with a Cast iron lid and galvanized steel skirt. The lay-in lid drops into the frame without bolts for...
$ 193.45
Cast Iron Manhole Cover, Round 18"x24", Lay-In, Steel Skirt
The EMCO Wheaton A0717-018C is a 18" round manhole with a Cast iron lid and galvanized steel skirt. The lay-in lid drops into the frame without bolts for quick, unrestricted...
$ 335.72
Monitoring Manhole Cover, Round 12"x 12" long metal skirt
The Martin Products MWL1212SM is a 12" monitoring well manhole cover with a long galvanized steel skirt. Provides traffic-rated access protection for groundwater monitoring wells. The extended skirt height accommodates...
$ 183.00
Monitoring Manhole Covers, Round 12" x 12" Ductile Lay-In
The EMCO Wheaton A0721-001L is a 12" monitoring well manhole with a lay-in (drop-in) lid for tool-free access during routine sampling. Black ductile iron lid, polyethylene skirt. The larger 11.2"...
$ 129.40
Monitoring Manhole Cover, Round 12"x8", Bolt-down Lid
The EMCO Wheaton A0721-128A is a low-profile 12" monitoring well manhole with galvanized steel skirt and 8.0" overall height. White ductile iron bolt-down lid. Choose the -128A over the -128...
$ 149.47Choosing the Right Manhole Cover
The cover and frame you need depends on three things: what’s going over it (foot traffic, vehicles, heavy equipment), what environment it’s in (roadway, coastal, chemical facility), and what access dimensions the opening requires.
Material
Cast iron — The industry standard for load-bearing applications. Handles vehicle traffic, resists settling, and lasts decades. Choose cast iron for roadway installations, parking areas, and any location with vehicle exposure.
Composite — UV-stable, corrosion-resistant, and significantly lighter than cast iron. The right choice for coastal environments, chemical facilities, and sites where corrosion would destroy a metal cover over time. Won’t rust, won’t degrade in sunlight.
Steel skirt — Heavy-gauge steel frame for maximum structural rigidity. Used where the frame needs to anchor into concrete or asphalt under traffic loads.
Configuration
- Lay-in lid — Drops into the frame flush. Easy to remove for access, standard for most installations.
- Bolt-down lid — Secured with bolts for tamper resistance. Required for secured facilities and high-traffic locations.
- Cam-lock — Quarter-turn locking mechanism on composite covers. Faster than bolts, more secure than lay-in.
Common Sizing
Round covers from 6” to 44” diameter. Square covers from 18” to 36”. Frame depths from 5” to 24”. If you’re replacing an existing cover, measure the opening diameter and frame depth before ordering. Not sure? Call us at (866) 514-3684 — we help contractors and engineers spec covers every day.
Related Categories
FAQ
Why are manhole covers round?
A round cover can’t fall through its own opening — the diameter is constant in every direction. A square cover, turned diagonally, could drop through. Round is inherently safer for any opening that workers or the public walk near.
How do I measure for a replacement manhole cover?
Measure the inside diameter of the existing frame (the opening the lid sits in), and the frame depth. Order a cover that matches both dimensions. If you’re unsure, call us with the measurements and we’ll confirm the right product.
Cast iron or composite — which should I use?
Cast iron for load-bearing and vehicle-traffic locations. Composite for environments where corrosion, UV, or chemical exposure would degrade metal — coastal sites, chemical plants, and industrial facilities.
Do you carry bolt-down manhole covers?
Yes. We carry bolt-down lid configurations in cast iron for applications requiring tamper-resistant, secured access.
