Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 01, 2023	Dec. 26, 2021	Jan. 01, 2023	Dec. 26, 2021
Segment Reporting Information [Line Items]
Sales	$ 219,218	$ 187,050	$ 706,953	$ 551,568
Gross profit	36,271	33,940	129,394	110,201
Selling, general, and administrative expenses	21,004	19,681	59,727	54,216
Operating income	15,267	14,259	69,667	55,985
Industrial [Member]
Segment Reporting Information [Line Items]
Sales	114,436	100,554	353,085	269,572
Gross profit	15,994	15,303	53,716	42,121
Selling, general, and administrative expenses	7,978	7,367	21,254	20,064
Operating income	8,016	7,936	32,462	22,057
Water Treatment [Member]
Segment Reporting Information [Line Items]
Sales	68,549	49,756	233,527	168,105
Gross profit	13,268	11,103	52,725	44,855
Selling, general, and administrative expenses	9,003	8,254	26,786	22,721
Operating income	4,265	2,849	25,939	22,134
Health and Nutrition [Member]
Segment Reporting Information [Line Items]
Sales	36,233	36,740	120,341	113,891
Gross profit	7,009	7,534	22,953	23,225
Selling, general, and administrative expenses	4,023	4,060	11,687	11,431
Operating income	$ 2,986	$ 3,474	$ 11,266	$ 11,794