Margo Grout Plugs - Click Right Here to See Selection Chart!

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Standard Margo Grout Plug Sizes
Reference Chart
(* Denotes Special Order)

Model
Number

Actual
Drill
Hole Diameter
(inches)

Actual
Drill
Hole Diameter
(mm)

Actual
Plug Size
(inches)

Pipe Size

Model Extension Add-On
for Overall Length of Plug in Inches
(e.g. DS087-48)

108

120

*DS087-

25.4

7/8

1/2"

■

*DS100-

1-1/8"

28.6

1/2"

■

DS112-

1-1/4"

31.8

1-1/8

1/2"

■

DS125-

1-3/8"

34.9

1-1/4

1/2"

■

DS137-

1-1/2" EX

38.1

1-3/8

1/2"

■

DS150--

1-5/8"

41.3

1-1/2

1/2"

■

DS162-

1-3/4"

44.5

1-5/8

1/2"

■

DS175-

1-7/8" AQ

47.6

1-3/4

1/2"

■

DS187-

50.8

1-7/8

1/2"

■

DS200-

2-1/8"

54.0

1/2"

■

DS212-

2-1/4"

57.2

2-1/8

■

DS225-

2-3/8" BQ

60.3

2-1/4

■

DS237-

2-1/2"

63.5

2-3/8

■

DS262-

2-3/4"

69.9

2-1/2

■

DS287-

3" NQ

76.2

2-7/8

■

DS312-

3-1/4"

82.6

3-1/8

■

DS337-

3-1/2"

88.9

3-3/8

■

DS362-

3-3/4" HQ

96.1

3-5/8

■

DS387-

101.6

3-7/8

■

DS412-

4-1/4"

108.0

4-1/8

■

DS437-

4-1/2"

114.3

4-3/8

■

DS462-

4-3/4"

120.7

4-5/8

■

DS487-

127.0

4-7/8

■

GROUT “MARGO” PLUG

Pressure Limitations

Our plugs, similar to most other grout plugs or packers as they are sometimes called, are anchored in the hole by expanding a flexible membrane to create a friction fit within the hole wall. For our membrane we use SBR Rubber because of its stiffness and higher shear strength.
By tightening the drive nut at the top of the plug, this forces the outer sleeve onto the rubber and compresses it causing the rubber to expand against the hole wall.
Because the plugs are used in many different types of ground, ground conditions and type of bit used to cut the hole we do not provide any pressure ratings with our plugs. Our plugs and similar styles are used throughout the industry and around the world for grouting applications for many years. For high pressure applications, customers sometimes choose to drill two anchor holes, one on each side of the grouting hole, and anchor rock bolts in these holes. Then the grout plug can be chained or cabled to the anchors as an extra precaution. For normal grouting operations the friction fit of the grout plug is usually enough.

Installation

Tighten the drive nut at the top of the grout plug until it just begins to compress the rubber. The rubber should be just snug in the hole and a bit of force is required to push it into the hole to the desired depth. Be sure to leave about 18” to 24” above the collar of the hole. Now continue tightening the drive nut to between 150 – 200 ft lbs of torque or until the end of the thread is reached. Check that the plug is secure in the hole. The diameter of the rubber and washers should 1/8” less than to diameter of the hole.

2 Piece Grout Plug - Available

The 2 piece plug is joined by a coupling set at the length desired. For the full 21 ft length, join the two pieces of hollow pipe with the coupling. The drive sleeve is also in two pieces and requires a washer be placed between the two butting ends. To use the short length, simply remove the second section and use the short section of hollow pipe and matching drive sleeve. This configuration is also useful in tunnels when it may be difficult of impossible to install a full length packer.