Hartman Hole Dome

Hartman Hole Dome is..



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 patent pending 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.

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.


150407_HHD3.75_white_175x175


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

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

HHD 2.5 -3.5  (Neon Orange) _ fits: 2.50″ – 3.5″ holes
HHD 3.75-5.5 (Yellow) _________ fits: 3.75″ – 5.5″ holes
HHD 5.75-8.0 (Neon Red) _____ fits: 5.75″ – 8.0″ holes

Features Compared to other
Hole Plugs /
Hole Covers
Hartman Hole Dome Product A Product
B
One Size Fits a Range of Hole Diameters YES NO Yes
Consistent Performance,
Independent of Installer
YES Yes NO.
Must be manually adjusted to fit each hole.
Fits Snug and Secure YES Wears Over Time NO
Waterproof to Floors Below Apply Caulk Yes NO
Fast and Easy Installation YES Yes NO
Fast and Easy Removal YES Yes Yes
1″ Top Overlap YES NO Yes

 

Product A

This product does not self-adjust to different sizes of hole.
Product is made for one specific 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 or and stay compressed and the cover could become lose and be knocked out of place.

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

 

Product B

This cover is weak due to the slots in the cover.
Water or liquid can run or migrate through the slots in the the cover into whatever is below or under the cover.

Cover will fit various size holes.
But, to fit various size holes it has parts that must constantly be adjusted and readjusted for installation.

This item does not fit tightly into the hole it is intended to cover.
The installer must slide a part along the slots in the top until they touch the edge of the hole and then tighten this part in place.
This is repeated until all 3 slides are against the sides of the hole.

The use of this cover is totally dependent on the person installing it. It has moving parts that must be manually adjusted to fit each and every installation.
 


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

Hartman Product Number HHD 2.50-3.5 HHD 3.75-5.5 HHD 5.75-8.0
Fits holes sized (inches) 2.50″ – 3.5″ 3.75″ – 5.5″ 5.75″ – 8.0″
Color of Dome Orange Yellow Red
Diameter of Dome 5.5″ 7.5″ 10.0″
Price / piece $13 $19 $22
Fits holes sized (cm) 6.35cm – 08.89cm 9.93 – 13.97cm 14.61 – 20.32cm

 


Category Product of the Year Winner


EC&M Magazine's Product of the Year Category Winner 2015 logo

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 Dome cutaway showing solid construction and machined steel plate


 


Hartman Hole Dome in 3 Color-Coded Sizes



Hartman Hole Domes Orange, Yellow, Red Self-Adjust to Cover Holes 2.5" - 8.0" in dameter


 





Close Up View, Hartman Hole Dome HHD 2.5-3.5


Hartman Dome HHD-2.5-3.5 with its Patent Pending Fin Design which self adjusts to a multitude of hole sizes


 


Installing


Installing Hartman Dome HHD-2.5-3.5 into a hole in cement floor at a construction site, image 7


 


Installed


Hartman Dome HHD-2.5-3.5 Installed into hole in floor at a construction site, image 8


 


Weight Bearing


Hartman Dome HHD-2.5-3.5 installed in floor with heavy machinery on top of it, demonstrating weight bearing feature of the hole covers, image 9


 


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

Bottom view of wooden board with a single size Hartman Hole Dome hole plug installed into 3 different size holes, showing how the fins flex to automatically adjust to the correct hole size


Who Uses Hartman Hole Domes..

Cupertino Electric Inc logo
Cupertino Electric
W-E-ONeil logo 198x59
W.E. O’Neil Construction

G.D. Heil Demolition Contractors Logo

GD Heil Demolition Contractors

VEM General Contractors in Hayward, CA uses Hartman Products, Hartman Hole Domes
VEM General Engineering

Competitions

Hartman Hole Dome is..

 


Hartman Hole Dome
Designed in California, USA
Manufactured in California, USA