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  3-Part Well Slugs

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Waterra 3-part well slugs are used for permeability testing in narrow diameter boreholes. They are manufactured from 3 solid cylinders of Delrin with threaded connections to allow 1, 2 or all 3 sections to be used. Two standard sizes are available for use in 50mm and 100mm diameter wells. Each size will achieve an approximate 1m change in water level within the borehole lining.

Use in conjunction with a data logger for accurate recording of water level changes during slug test.

Slug Test Method
Water is displaced in a borehole when a well slug is rapidly submerged (rising head test) or removed (falling head test) from the water column. For more detailed information on methodology and interpretation see BS5930 or BS ISO 14686. Download our Well Slug User Guide for Practical Field Guidance.


Slug test method illustrating data collected and interpretation of falling head test data.

For more details:
Download as PDF

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Well Slugs - 3-part Delrin

For up to 1 metre displacement use SLG-50 in 50 mm diameter wells and SLG-100 in 100mm diameter wells. See pdf sheet for dimensions, displacement volume and weight.

	Code Description
SLG-50 3 part calibrated slug (36mm OD x 1929mm / 1.963 litres / 2.7kg)   SLG-100 3 part calibrated slug (80mm OD x 1563mm / 7.86 litres / 11kg)

Well Slugs - Lifting Cord and Reel

A simple high impact hand reel avoids unsightly and dangerous trailing of cord on the ground during use. The reel can hold up to 100m of polyester or Kevlar cord, which is supplied separately. The spool is removable, and additional spools can be purchased.

	Code Description
ERL-110 Hand Reel with removable spool (holds 100m of 3.5mm cord)   BC/K35-50 Lifting Cord - 3.5mm diam polyester cord (50m)   BC/K35-300 Lifting Cord - 3.5mm diam polyester cord (300m)   KC2-100 Kevlar Rope (100m x 2mm - spooled)