Thank you, Launderess. I have a 10 pound bucket delivered every four months on a subscription plan through Amazon Prime. I keep a container downstairs for laundry and a smaller one upstairs for the dishwashers. I imagine I keep a long section of our street's sewer pipes free from buildup along with my machines. STPP is also essential for a Hot Break as our former member Budd the Laundry Man from Texas told us. If you have textiles with blood or other protein deposits, STPP in hot or warm wash water will remove the protein without setting it, eliminating the need for cold water pre-washing. STPP is also good for encouraging blooms on crepe myrtles that don't seem to have enough phosphate in the soil to really put on a spectacular bloom display. In the spring I dissolve some in hot water and pour it around the plants then stand back.