Hartman Hole Dome is..

EC&M‘s 2015 Product of the Year Category Winner!

• featured in April 2015 issue of EC&M
• featured in May 2015 issue of Electrical Wholesaling

The Hartman Hole Dome

Our innovative hole covers easily plug electrical and plumbing holes ranging from 2.5″ – 8″ in diameter.

Hartman Hole Domes automatically adjust to the diameter of the hole you need to cover.
With no moving parts, Our hole covers are designed for quick installation and removal.

Our hole plugs fulfill OSHA safety requirements for securely covering wall and floor openings at construction sites.

Unique Features

Friction Fit – Self Adjusting

Our patented design allows each Hartman Hole Dome to self-adjust for a custom fit across a wide range of common hole diameters.

Quick Installation

Simply “Twist!” and Push to install, “Twist!” again and Pull to remove!

Innovation

The Hartman Hole Dome has fins on the “plug” portion which inserts into the hole with a “Twist!” .
The fins flex to a friction-fit within the hole.
Smaller holes cause the fins to flex more.

Our innovative fins allow just 3 sizes of hole covers to fit 22 standard size holes:
From 2 1/2″ to 8″, counting at 1/4″ increments. They will also fit most dimensions in between, including metric increments. See Specs for details.

Color Coded

Hartman Hole Domes are color coded to indicate hole diameters it is designed to cover.
Covers are also clearly labeled with raised lettering at the top of each dome.
Neon Orange: ___ 2.50″ – 3.5″ holes
Yellow: ___________ 3.75″ – 5.5″ holes
Neon Red: _______ 5.75″ – 8.0″ holes

Easy Removal and Installation

Install:
Simply “Twist!” and Push into place in either direction, clockwise or counterclockwise.

Remove:
Simply “Twist!” and Pull. Always “Twist!” in the same direction in which the plug was initially installed.

There are no moving parts, and no tools required.

Weight Bearing and Secure

Meets OSHA Regulations for Construction Site Hole Covers

The diameter of the top of the Hartman Hole Dome is designed to maintain a 1″ or more overlap of the floor or wall that the hole is in. The top of the Hartman Hole Dome will also overhang the outside of any pipe or conduit the plug is inserted to.

For example, the HHD 2.5 – 3.5 cover has topside diameter of 5.5″,
which ensures an overlap of 1″-1.5″ depending on hole size.

Likewise, the HHD 3.75 – 5.5 has a dome diameter of 8.0″,
ensuring an overlap of 1″-2″ depending on hole size.

This 1″ lip provides support of the hole plug to help ensure it will not be forced into the hole, pipe, or conduit the plug is protecting.

Waterproofing

Water damage is a real cost concern during construction.

Caulking can be applied to the Hartman Hole Dome around the perimeter, and to the underside of the top of the hole plug to aid in preventing water from dripping onto the floor below.

You may adjust quantities in the Shopping Cart,
or press “Add to Cart” again to add more.

IMPORTANT
Purchase the Hole Dome size according to
the diameter hole you are looking to cover or plug:

Installation Instructions PDF

DO NOT just force plug straight into hole or pipe. This will cause damage to the flexible fins. Always “Twist!” when installing and removing”

Install

Always “Twist!” and Push into hole or pipe.

Remove

Always “Twist!” and Pull out of hole or pipe.

NOTE:

Plugs can be “Twisted” Clockwise OR Counterclockwise to Insert.
Must be “Twisted” in the Same direction to Remove.

If plug does not want to twist in the direction you turn for removal, try twisting in the other direction. There is no way to know which way the installer twisted the product at install.

For efficiency, you may want to adopt a convention of “always Twist Right” (or “always Twist Left”) to insert And remove.

DO NOT install the hole plug in holes that are not with-in the size range the hole plug is intended for.

Size range is Printed on top of each hole plug, and also is color coded:
Neon Orange: ___ 2.50″ – 3.5″ holes
Yellow: ___________ 3.75″ – 5.5″ holes
Neon Red: _______ 5.75″ – 8.0″ holes

Product A

This product has no adjustments to accommodate different hole sizes.
Each item is made for one specific, exact hole size.
A 4” cover will not fit 3 ¾” or 4 ¼” holes.

The underside of this product has a foam ring around the protrusion that fits into the floor.
This foam can wear out and stay compressed. When this happens, the cover could become loose, and be knocked out of place.

This product does not have 1” of bearing surface as the “Hartman Hole Dome”.

Product B

This hole cover can be manually adjusted to fit various size holes.
However, to fit various size holes, every cover must be re-adjusted at every install.
This manual adjustment can be time consuming.

This product is not easy to use, which can result in frustration and/or non-use.
To use: The installer must slide a part along the slots in the cover until it touches the edge of the hole. This part is then tightened to stay in place. Repeat the process until all 3 slides are against the sides of the hole.
The effectiveness of this hole plug is totally dependent on the person installing it.

This item does not fit tightly into the hole it is intended to plug.
It has moving parts that must be manually adjusted to fit each and every installation.
Thus it is prone to the installer’s attention to detail.

This hole plug is physically weak due to the adjustment slots in the cover.

It is Not waterproof to floors, or the opening below its cover.
Water or liquid can migrate through the slots in the the cover.

Each of the Hartman Hole Dome hole plugs, hole covers, fits a range of common hole sizes.
For example the HHD 2.5-3.5 securely fits any hole from 2.5″ to 3.5″ in diameter.

Each Hartman Hole Dome top always overlaps the largest hole, pipe, or conduit it can be inserted into by 1″.
Covers are Color Coded, with size range printed on the top

Category Product of the Year Winner

featured in April 2015 issue of EC&M

featured in May 2015 issue of Electrical Wholesaling

Cut Away Showing Solid Construction

HHD 3.75-5.5 Constructed with a Machined Steel Plate inside. Weighs a whopping 2Lbs!

The smaller HHD 2.5-3.5 Is Solid. Much sturdier than hollow covers you’ll find elsewhere.

Hartman Hole Dome in 3 Color-Coded Sizes

Close Up View, Hartman Hole Dome HHD 2.5-3.5

Installing

Installed

Weight Bearing

Hartman Hole Dome

How It Works

Bottom View of Hartman Hole Dome Installation
Fins flex to accommodate a range of hole sizes with a single plug