Harwil

Harwil manufactures flow and level switches, the devices that detect whether liquid is moving through a pipe or how high it sits in a tank. Its line includes paddle-style and adjustable flow switches, stainless steel level switches, and chemical feed and pump controllers. Its products serve chillers and boilers, pool and spa systems, irrigation, water treatment, commercial cleaning, and municipal wastewater.

The company has made these switches for over 60 years and focuses on cost-effective, reliable parts with fast shipping. Harwil is based in Oxnard, and customers with technical questions can call or email the office. The office is open weekdays during regular business hours, and orders and product specifications are handled by phone or email.