Plan Scale Converter
Convert a measured plan length to real-world length using standard or custom scales.
Welcome to ConstructIQ™ — Trade-Specific Training & Certification
Build. Learn. Preserve. Our platform delivers customized, trade-specific study programs with weekly videos, quizzes, tests, and certifications. Explore our full ecosystem below and claim $100 OFF any class.
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Intern Academy
License Reciprocity
Consulting & PM Services
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Trade Programs
Electrical, HVAC, Plumbing, Civil, Structural, Architectural, Fire Protection.
E-Deck Estimator
Man-hour calculators & take-off tools by trade to price work with confidence.
Project Management
Scheduling, RFIs, submittals, closeout, and field coordination workflows.
Safety / OSHA
Toolbox talks, OSHA 1926 standards modules, and certification paths.
License Reciprocity
Multi-state licensing, paperwork guidance, and exam support.
Intern Academy
9-month training tracks with quizzes, tests, and progress reviews.
Questions? info@sfjohnsonconsulting.com • 844-261-9737
🛠️ Plumbing Pro Cheat Sheet & Field Tools
Scale conversions, DWV slope, trench volumes, rough-ins, fast BOM builder, and notes—optimized for jobsite use.
DWV Slope Helper
Compute vertical fall for a horizontal drain run.
Check trap arm limits & venting per local code.
Trench Volume & Bedding Calculator
Estimate total trench excavation and bedding material.
Note: Bedding volume assumes uniform thickness on trench bottom.
Quick Rough-In Reference (Typical — verify local code & cut-sheets)
| Fixture | Centerline / Offset | Drain Rough | Supply Rough | Notes |
|---|---|---|---|---|
| Toilet (WC) | 12″ from finished wall to flange center | 4″ or 3″ | ½″ @ 6″ left of center, 6″ AFF | Spec may be 10″/12″/14″ |
| Lavatory | Centered on vanity | 1¼–1½″ @ 18–20″ AFF | ½″ H/C @ 20–22″ AFF | Trap arm slope ¼″/ft |
| Kitchen Sink | Centered in base cab | 1½″ @ ~18″ AFF | ½″ H/C @ 21–22″ AFF | Disposer per mfr. |
| Shower | Drain centered | 2″ drain | ½″ mixing ~48″ AFF; head ~80″ | Pan test req’d |
| Washer | Box centered ~42″ AFF | 2″ standpipe 30–36″ AFF | ½″ H/C to box | Trap within 12″ |
Fast BOM Builder — Branch Run Helper
Add branch runs to total pipe by size and fittings. Great for quick material lists.
| System | Material | Size | Length (ft) | 90° | 45° | Tees | Couplers | Remove |
|---|
Your Notes & Links
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Field reference only — confirm with local code, plans, and manufacturer cut-sheets.