Geotextile Vertical Water Permeability Tester

The Geotextile Vertical Water Permeability Tester is designed to determine the water permeability of geotextiles and geotextile-related products perpendicular to the plane of the material under constant-head conditions. The instrument features an adjustable water head ranging from 0 to 300 mm and a system designed to maintain a stable water head during testing.

Its box-type structure helps reduce head loss, supporting reliable measurement of water flow through geotextile specimens. The tester is suitable for evaluating the hydraulic performance of geotextiles used in filtration, drainage, and geotechnical engineering applications.

Application

(1) Geotextiles

(2) Nonwoven geotextiles

(3) Woven geotextiles

(4) Geotextile-related products

(5) Water permeability testing under constant-head conditions

(6) Geotextile filtration and drainage performance evaluation

(7) Geosynthetic testing for highway engineering

(8) Geotechnical material quality control

Standards

(1) ISO 11058:2019 — Geotextiles and Geotextile-Related Products — Determination of Water Permeability Characteristics Normal to the Plane, Without Load

(2) ASTM D4491/D4491M-22 — Standard Test Methods for Water Permeability of Geotextiles by Permittivity

(3) GB/T 15789-2016 — Geotextiles and Geotextile-Related Products — Determination of Water Permeability Characteristics Normal to the Plane, Without Load

(4) JTG 3460-2026 — Test Methods of Geosynthetics for Highway Engineering

(5) SL 235-2012 — Specification for Test and Measurement of Geosynthetics

Parameters

Features

(1) Measures vertical water permeability of geotextiles under constant-head conditions.

(2) Adjustable water head from 0 to 300 mm.

(3) Maintains a stable water head during testing.

(4) Box-type structure helps reduce head loss.

(5) Accommodates specimens with diameters of 50 mm and 100 mm.

(6) Suitable for geotextiles and related geosynthetic products.