A sprinkler base is provided comprising a platform component and a flow component connected in a manner to allow for an attached sprinkler head to be adjusted to a preferred vertical or near vertical position when the sprinkler base is placed on a sloping surface. The flow component may have a tubular body encompassing a flow passage. A fluid inlet and a first fluid outlet may communicate with each other via the flow passage. The first fluid outlet may be arranged to receive a sprinkler head extending perpendicularly to an axis of the tubular body. The platform component may include mounting means to hold the tubular body of the flow component. Restraint means may be provided to restrain the tubular body adjustable in fixed increments against rotation about the axis of the tubular body relative to the platform component in one of a plurality of incremental rotational positions.
