Fire hydrants of the type approved by the fire protection district of jurisdiction shall be installed in every subdivision as part of the water distribution system. The distance from any residential lot to a hydrant, measured along the centerline of the public right-of-way, shall not be greater than 500 feet. In all other zone districts, hydrant spacing shall not exceed 300 feet. Developer to provide sign off from the fire district approving the location of all fire hydrants.