Pride Plumbing came out and provided cost estimates to 1) run a 3/4-inch PEX loop line from a back bathroom to the water heater, add two spring check valves at the water heater to keep the hot water from fading into the cold water side, and install a booster pump and set its timer for recirculating the water from the water heater to all the fixtures in the home; and 2) repipe and replace the cast iron drain lines under the house in the crawlspace, going to a) the fixtures in the kitchen (sink and dishwasher) and one bathroom (sink, toilet, and bathtub/shower) - replacing the toilet bowl's flange and wax seal, the P-traps underneath all the sinks, and the bathtub/shower's waste and overflow; and b) the washing machine - installing new PVC piping, fittings and supports under the house and up through the flooring for each fixture and air admittance valves inside the home where needed.