... through doorways or in tight storage spaces. Depending on your rainwater collection requirements, bladderss may be built from either a ... 1,500 gallons5,678 liters168" (4.27 m)120" (3 m)18" (0.46 m)2,000 gallons7,570 liters174 ... ,708 liters33' (10.1 m)25' (7.6 m)3.5' (1.07 m)30,000 gallons113,562 liters36' ( ... 11 m)32' (9.75 m)3.5' (1.07 m)40,000 gallons151,416 liters37' ( ...