SCO Plumbing & Gas study plan

Map the Plumbing Discipline domain into its major sub-areas (drainage and venting, water supply and distribution, fixtures and fittings, code administration) and rate your current confidence in each on a 1-5 scale

Build a personal reference sheet of the plumbing code sections you will cite most often, organized by sub-area rather than by code book order

Define the vocabulary of drainage design (fixture unit, developed length, slope, trap arm, vent stack, stack vent, wet vent) and write a one-sentence definition for each in your own words

Calculate fixture-unit loads for three different single-dwelling layouts and size the building drain and main stack from those loads

Determine minimum trap arm length and vent size for at least six fixture scenarios using developed length and trap arm rules

Identify the conditions that require a vent to be increased in size or a wet vent to be prohibited, and record them as decision rules

Size water supply piping for a multi-fixture branch using demand load and pressure-loss methods, and explain when each method applies

Describe backflow prevention device selection for a given cross-connection scenario and justify the choice against the hazard level

Explain the installation requirements for water heaters (relief valve discharge, expansion control, seismic or support restraint, venting of fuel-fired units) without reference to any figure

Work through a full fixture-and-fitting installation sequence for a bathroom group, naming the rough-in dimensions and clearances that must be verified before close-in

Diagnose five common plumbing failure symptoms (slow drain, gurgling, sewer odor, hammering, inconsistent hot water) and trace each to a likely code-related cause

Rehearse explaining a plumbing inspection failure to a client in plain language, including the corrective action and the code basis

Map the Gas Discipline domain into combustion air, venting, piping and sizing, pressure testing, and appliance connection sub-areas, and rate your confidence in each

Define gas-specific vocabulary (BTU input, manifold pressure, supply pressure, draft hood, Category I through IV appliance, excess air, spillage) and write a definition for each

Build a gas code-section reference sheet organized by sub-area, mirroring the plumbing sheet from week 1

Size a gas piping run using the longest-length and BTU-load method, and show how the table changes when a second pressure stage is introduced

Determine combustion air requirements for a confined space using both the indoor-air and outdoor-air approaches, and state when each is permitted

Select and size a vent category for a given appliance and explain the draft and spillage risks that drive the category limits

Describe the pressure test procedure for a new gas piping system: test medium, test pressure, duration, and what must be isolated before testing

List the required clearances and protection methods for gas piping passing through walls, ceilings, and concealed spaces

Explain appliance connector limits, sediment trap placement, and shutoff valve location for a typical residential installation

Run two full-length timed mixed practice exams and score each by domain so you can see which side is still weak

Re-derive every missed item from the governing rule rather than memorizing the answer choice, and log recurring error patterns

Review only your two reference sheets and confidence maps on the final day, then confirm logistics for exam day