Nathan, Heath, and Mauro baby proof a home; Richard explains how septic systems work.

Nathan, Heath, and Mauro help a homeowner baby proof her house by testing for lead, testing smoke detectors, replacing old receptacles with tamper-resistant ones, and installing cabinet locks and baby gates; Jenn breaks down the basics of caring for houseplants; Richard explains how septic systems works, how they can fail, and how to maintain them.