Car Wash Troubleshooting Quick Reference #4 – Chemical Delivery Troubleshooting Flowchart

Chemical not reaching the vehicle? Follow the product path and find where it stops.

Chemical-delivery problems can waste product, reduce wash quality, and lead to unnecessary parts replacement. This quick-reference flowchart provides a systematic way to diagnose chemical delivery problems from the supply container all the way to the final application point.

Use this guide to help diagnose:

• No chemical delivery

• Weak chemical output

• Incorrect chemical concentration

• Chemical pickup problems

• Clogged metering tips

• Injector problems

• Foot-valve and check-valve failures

• Restricted or damaged tubing

• Air leaks in the pickup line

• Clogged filters and screens

• Solenoid and control-valve problems

• Worn or clogged spray tips

• Intermittent chemical delivery

Follow the chemical path:

CHEMICAL SUPPLY → PICKUP → METERING → INJECTOR/PUMP → CONTROL VALVE → DELIVERY LINE → SPRAY TIP/APPLICATOR

Start at the source and follow the product path one step at a time.

Determine where chemical flow stops, test that section, and prove the failure before replacing parts.

Designed as a fast field reference for car-wash technicians, owners, operators, and maintenance personnel.

Keep it on your phone or tablet, or print a copy for the equipment room.

Part of the Practical Car Wash Troubleshooting Series by Loyd Smith.