n = minetest.env:get_node(pointed_thing.under)
		if n.name == "default:water_flowing" then
			minetest.env:add_node(pointed_thing.under, {name="default:water_source"})
			return
			end
		n = minetest.env:get_node(pointed_thing.above)
		if n.name == "air" then
			minetest.env:add_node(pointed_thing.above, {name="default:water_source"})
			return
			end