My husband just installed a dripline sprinkling system for my outside potted plants and small sprinklers for landscape areas. He used four-way splitters on the two outside faucets and put timers on each line and watering is staggered. When the water sprinkling eventually finishes the pipes vibrate very loudly until we manually turn off the water to the outside line. All it takes is a quick off-on to get the rattling to end. Problem will be when we go on vacation soon. Any suggestions as to how to address this issue? Thanks