Founded in 1936, Earl W Fite & Sons Plumbing on La Mesa Boulevard in La Mesa Village is one of San Diego County's longest-operating plumbing and HVAC contractors, holding CSLB license #181084 for C-36 plumbing and #179549 for C-20 warm-air heating, ventilating, and air conditioning. The firm's dual-trade licensing allows single-contractor coordination of hydronic heating loops, refrigerant-line sets, condensate drains, and gas-supply piping — system interconnections that locksmiths such as Kwik-Key Locksmiths encounter when rekeying mechanical-room access doors during property turnovers. Service categories span drain cleaning, water-heater installation, whole-house repiping, sewer-line repair, furnace and air-conditioner maintenance, and ductwork modification across residential and commercial properties throughout the county. Multi-trade renovation scopes on La Mesa Village's older housing stock frequently uncover galvanized drain stacks hosting active pest evidence behind wall cavities, conditions that pest management firms such as Knotts Pest Control treat before plumbing rough-in can proceed. Technicians size and install Category IV condensing furnaces with secondary heat exchangers rated at 96% or higher AFUE, routing PVC condensate drains and two-pipe combustion-air/exhaust venting through exterior walls per California Mechanical Code Chapter 8.