• Highlight: Side-port chemical injection meters concentrate directly into the spray stream, letting a single tank deliver multiple chemistries without cross-contamination between fills.
• Best For: Carpet cleaning pros running prespray, traffic-lane treatment, and spotter chemistry from one unit throughout a job.
• Expert Note: The adjustable high-pressure output (up to 1000 psi on the Plus models) breaks emulsified soils loose fast — critical on heavily soiled commercial carpet where a low-pressure pump-up sprayer would only wet the surface.