No faucets shall be allowed on the outside of any building excepting hose connections, which must be controlled with a separate stop and wastecock. No hose connections for domestic use will be allowed. All water pipes must be extended into the building. Pipes laid for lawn sprinkling systems must be installed so that the system may be properly drained to prevent freezing. Connections for sprinkling systems or for other supply shall be made from the water service pipe on the owner’s private property and beyond the building stop and wastecock and must include an approved State of Oregon backflow prevention device.