Abstract: The present invention is a test valve plug assembly designed to be installed within a drain tee which connects a tub drainage and overflow system to the drainage system of a building. In its closed position, the test valve plug provides a means for closing the drain tee, thereby permitting the drainage system below the drain tee to be filled with water for testing purposes.

Abstract: A multi-channel pipe for monitoring groundwater in aquifers at multiple levels below a single site. Pipe sections each comprise an outer wall, an interior element dividing the pipe into multiple channels, a monitoring port opening into one of the channels, coupling means for joining pipe sections lengthwise to each other, and a plug for plugging the channel immediately below the monitoring ports. The interior element is preferably star-shaped, having a hollow cylindrical central core and eight radial segments affixed between the core and the outer wall. Each channel is defined in part by the outer wall and in part by two adjacent segments of the interior element. Corresponding channels of adjacent pipe sections are joined by couplings each channel receiving one end of a coupling. A capped plug is inserted into the upper end of the coupling below immediately above the monitoring ports of a channel. An inflatable packer encircling the pipe seals the drill hole between groups of monitoring ports.