Business segment reporting

3 Months Ended

Apr. 30, 2012

Business Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

Business segment reporting. The Company has three reportable segments. Piping systems engineers, designs, manufactures and sells specialty piping and leak detection and location systems. Filtration products manufactures and sells a wide variety of filter elements for air filtration and particulate collection. Industrial process cooling engineers, designs, manufactures and sells chillers, cooling towers, plant circulating systems and accessories for industrial process applications. Included in corporate and other activity is a subsidiary which engages in the installation of heating, ventilation and air conditioning systems ("HVAC"), but which is not sufficiently large to constitute a reportable segment.

	Three Months Ended April 30,
	2012			2011
Net sales
Piping Systems		$19,744			$19,027
Filtration Products	22,976			24,843
Industrial Process Cooling	9,131			7,155
Corporate and Other	877			2,376
Total		$52,728			$53,401
Gross profit
Piping Systems		$3,398			$2,813
Filtration Products	3,112			3,312
Industrial Process Cooling	2,532			1,945
Corporate and Other	86			172
Total		$9,128			$8,242
Income (loss) from operations
Piping Systems		$155			($223	)
Filtration Products	196			510
Industrial Process Cooling	563			204
Corporate and Other	(2,633		)	(2,135		)
Total		($1,719	)		($1,644	)
(Loss) income before income taxes
Piping Systems		($91	)		($406	)
Filtration Products	196			510
Industrial Process Cooling	563			204
Corporate and Other	(3,004		)	(2,422		)
Total		($2,336	)		($2,114	)