In Piping; Should be Easy to See. Also, You Can ID the Cord
Connection Plugged Into the Side of the Control Box (as
pictured) and Follow Cord to Flow Switch. OFTEN You Can Just
Replace the Flow Switch and Discard White Housing It Comes In.
Just Make Sure You Use New Teflon Tape and ONLY Tighten to Snug
AND Follow the Arrows. This Switch IS Directional.