[Diagram: HV3 drain port → 1/2" barb fitting → flexible tube → air gap → standpipe]
⚠️ Do not reduce the drain line below 1/2" ID. Restriction causes control valve backpressure.
✅ Tube secured with stainless steel clamp. ✅ Checkbox: Air gap verified (no submerged tube). ✅ Checkbox: Drain line pitched downward continuously. If you need this converted into an actual outline, table of contents, checklist poster, or a first draft of a specific section (like the programming or brine tank priming), just let me know.
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