<p>These are great if your water isn't clean or if you're planning to add liquuid fertilizer to it. Come out of a water storage container, use a filter and then go on to a Blumat system. Includes a bulkhead adapter, filter, PVC and Blumat adapters.</p>  <p>We just found some better components - these work much better now and the price is less! This is better though as an "insurance" measure rather than something for frequent use. If you need to frequently clean the filter, we would recommend getting a filter with the clear bowls like our&nbsp;<b>Banjo T-Line Strainer, </b>WP15690.</p>