
kwik-ZIP® Inert Centralizer and Spacer System


Features
- Ideal for use with all types of casing, pipe, and screening, including PVC, steel, fiberglass, and gravel-packed screen installations.
- New GT Series - Ideal for small diameter drop pipe and Geo engineering applications, including rock bolts, soil nails, logging, sondes, etc.
- Rapid on-site assembly with lightweight, kwik-ZIP® segments.
- Fully adjustable Centralizer diameter -- just add more segments!
- No pins, bolts, or welding.
- Easy and economical to transport in stackable flat segments.
- Corrosion resistant.
- Will not damage casing.
- Different Bow heights available for varied annulus sizes.
- Suitable for formation temperatures up to 176° F (HT Series).
- Satisfies Major Industry Standards such as:
- NGWA (USA) Manual of Water Well Construction Standards, 2nd Edition
- ANSI/AWWA a100-97: Water Wells
- ASTM D 5092: Ground Water Monitor Well Design
- Australian Minimum Bore Construction Requirements (including requirements for Inert Centralizers)

The range of kwik-ZIP® GT Series is available in 3 different bow heights:
- GT 20-1 0.79" Bow Height
- GT 30-1 1.18" Bow Height
- GT 40-1 1.57" Bow Height
- Rock bolts
- Soil nails
- Small diameter drop pipe
- Down hole cameras and geophysical tools
NOTE: GT Series cartons contain 100 units.
0.70" to 2.56" diameter GT Series (includes GT 20-1, GT 30-1, GT 40-1) | |
Applications: Small diameter rock bolts, soil nails, drop pipe, etc., from 0.70" to 2.56" diameter | |
OD of Bar, Pipe, or Screen, etc. | Units Required per Centralizer |
0.70" to 1.14" | 2 |
1.14" to 1.81" | 3 |
1.81" to 2.56" | 4 |
Over 2.56" | Use 155 HT Series |

A kwik-ZIP® centralizer model is available for all pipe, bar, or screen diameters above 0.70" OD. No Setting tool is required for the GT Series. Select the appropriate kwik-ZIP® Casing Centralizer Segment Model for your application from the following table:
Model and Bow Height (inches) | Service Temperature (degree F) | Recommended for Casing Diameter (nominal diameter range - inches) |
GT 20-1 0.79" | 176° F | 0.70" to 2.56" |
GT 30-1 1.18" | 176° F | 0.70" to 2.56" |
GT 40-1 1.57" | 176° F | 0.70" to 2.56" |
kwik-ZIP® 155 and 380 Series

- 155 HT-D 1.18" Bow Height
- 155 HT-E 2" Bow Height
- 380 HT-D 1.18" Bow Height
- 380 HT-E 2" Bow Height
The 155 Series will fit bar and pipe diameters ranging from 2.28" OD to 7.09" OD. The 380 Series will fit pipe 6.3" OD and greater. Both of these products are ideally suited for:
- Gravel-packed screens
- Casing
- Drop pipe
- Pump installation
Click here for 155 and 380 series selection and installation guide
A special setting tool is required to install these products that are manufactured from a high-grade engineering plastic called Acetal POM.

2.28" to 7.09" diameter 155 HT Series (includes 155 HT-D, 155 HT-E) | |
Applications: Grouted casing, gravel-packed screen, drop pipe, anchors, etc., with diameters greater than 2.28" | |
OD of Bar, Pipe, or Screen, etc. | Units Required per Centralizer |
2.28" to 3.54" | 2 |
3.54" to 5.12" | 3 |
5.12" to 7.09" | 4 |
Over 7.09" | Use 380 HT Series |

A kwik-ZIP® centralizer model is available for all pipe, bar, or screen diameters above 0.70" OD. A setting Tool is available for the 155 and 380 Series models to assist with correct installation. Select the appropriate kwik-ZIP® Casing Centralizer Segment Model for your application from the following table:
Model and Bow Height (inches) | Service Temperature (degree F) | Recommended for Casing Diameter (nominal diameter range - inches) |
155 HT-D 1.18" | 176° F | 2.28" to 7.09" |
155 HT-E 2" | 176° F | 2.28" to 7.09" |

6.30" and greater diameter 380 HT Series (includes 380 HT-D, 380 HT-E) | |
Applications: Grouted casing, gravel-packed screen, drop pipe, cased crossings, etc., with diameters greater than 6.30" | |
OD of Bar, Pipe, or Screen, etc. | Units Required per Centralizer |
6.30" to 9.05" | 2 |
9.45" to 13.39" | 3 |
13.39" to 18.11" | 4 |
18.11" to 22.83" | 5 |
22.83" to 27.56" | 6 |
27.56" to 31.50" | 7 |
Over 31.50" | Refer to Installation Guide |

380 HT Series Centralizer
A kwik-ZIP® centralizer model is available for all pipe, bar, or screen diameters above 0.70" OD. A setting Tool is available for the 155 and 380 Series models to assist with correct installation. Select the appropriate kwik-ZIP® Casing Centralizer Segment Model for your application from the table:
Model and Bow Height (inches) | Service Temperature (degree F) | Recommended for Casing Diameterb(nominal diameter range - inches) |
380 HT-D 1.18" | 176° F | 6.30" and larger |
380 HT-E 2" | 176° F | 6.30" and larger |



kwik-ZIP® HD Series
The range of kwik-ZIP® HD (Heavy Duty) Series is available in 4 different bow heights:- HD 30 - 1.18" Bow Height
- HD 50 - 2" Bow Height
- HD 75 - 3" Bow Height
- HD 100 - 4" Bow Height
- Horizontal and vertical applications
- Double containment PIP applications and underground crossings
- Gravel-packed screens
- Torque arrester
- Casing, screen, and pump riser installations
- Made with heavy duty engineering thermoplastics and rated to 176° F, with no metal parts
- Special Bow Spring design allows use on heavy weight pipe
- Curved bow profile and low friction coefficient allow for easy insertion of casing into the borehole
- The segmented design fits all pipe diameters from 4" DN and above, with additional segments added as diameter increases
- Rapid onsite assembly
- Segment design and packaging allow for low inventory and transport costs
- Integrated rubber grip pads prevent movement on the pipe
- Suitable for all pipe materials, including PVC, Poly, Stainless Steel, Fiberglass and GRP, etc
- Only a standard screwdriver is required for installation, with no tapes or adhesives necessary

