Gilbert Block manufactures a variety of Septic Tanks and Pump Chambers and a variety of other concrete products. Our standard line ranges from 1000 to 4000 gallons. Our heavy duty line ranges from 3000 to 5000 gallons and our third is The Eliminator. This a combination Septic and Pump Tank two compartment system that ranges from a combination holding capacity of 1000 to 2160 gallons. We also carry a line of Plastic Septic Tanks that range from 300 to 1500 gallons. Pump chambers come in a variety of sizes and almost any size is available upon request.