With the GARDENA "Profi" Maxi-Flow System Washer Set, the GARDENA "Profi" Maxi-Flow System Threaded Tap Connectors can be newly sealed. The Washer Set includes 3 o-rings and 1 flat packing-ring for the GARDENA "Profi" Maxi-Flow System Threaded Tap Connectors (Art. No. 2801-20 and 2802-20). Through the new washers, the tap connector holds watertight again, thereby removing the necessity of a new purchase.