(h) A, the owner of two adjoining houses, Y and Z, sells Y to B, and retains Z. B is entitled to the benefit of
all the gutt ers and drains common to the two houses and necessary for enjoying Y as it was enjoyed when the
sale took effect, and A is entitled to the benefit of all the gutters and drains common to the two houses and
necessary for enjoying Z as it was enjoyed when th e sale took effect.