im not sure about the 104's but i know that the 204, 304 and 404 have a valve on it called the "aqua stop" that allows you to control the flow. if need be you can turn this down a little bit. however, the directions specifially say not to turn down the "aqua stop" more than half way during operation... if the 104 has this feature, then there is your solution. if not, then totally disregard this post. heh