to supply: Domestic water systems and public water systems include but are not limited to pumps, pressurization, filtration, treatment, or other equipment and controls, and irrigation water pumps, circular irrigating system's pumps and pump houses.This specialty may also perform the work defined in (c) of this subsection.Also see RCW 18.106.010 (10)(c).(c) Domestic pump (03A): Limited to the exte