Standpipe Piezometers

Standpipe Piezometers

Applications

Standpipe piezometers are used to monitor piezometric water levels. Water level readings are typically obtained with a water level indicator. Typical applications include:

  • Monitoring pore-water pressure to determine slope stability.
  • Monitoring seepage and ground water movement.

Operation

The standpipe piezometer, which consists of a filter tip and a riser pipe, is installed in a borehole. The zone around the filter tip is backfilled with sand and a bentonite seal is place above that to isolate the intake zone. The remainder of the borehole is backfilled with bentonite-cement grout. Pore water flows into the standpipe until a pressure equilibrium is reached. The water level in the pipe then represents the pore-water pressure in the soil around the intake zone. Readings are taken with a water level indicator.

Standpipe Piezometers

Advantages

  • Economical components.
  • Simple to read.
  • Very good long-term reliability.

For More Information

Please download the Standpipe Piezometer and Water Level Indicator datasheet.
If your Water Level Indicator has seen a lot of use, you may be interested in our replacement parts page.

Drawing of Standpipe Piezometers in Use

Standpipe Piezometers Specifications

STANDPIPE FILTER TIPS
Polyethylene Tip, 12" (305 mm) 51417402 Standpipe filter tip is used with plastic riser pipe. Tip mates directly with 0.75" slip coupling and is supplied with an adapter kit (51405150), which includes adapters for 0.5" and 1"pipe
Polyethylene Tip, 24" (610 mm) 51417404
Porous Stone Tip, 12" (305 mm) 51405102
Porous Stone Tip, 24" (610 mm) 51405104
Optional Adapter to 1.25" pipe 50712521
Optional Adapter to 1.5" pipe 50712531
Filter Material Polyethylene tip is made from hydrophilic polyethylene and has 60 micron pores. Porous stone filter is made from fused aluminum oxide (Norton Alundum) and has 68 micron pores
Filter Size Filter is 1.5" diameter cylinder, 12 or 24 inches long