All Non Potable Bladders come with a FREE ground pad. Waste water bladders built by AIRE Industrial are perfect for all water storage or recapture/recycling situations. These water pillow tanks are currently being used by farmers, emergency response units, disaster relief organizations, hazmat clean up enterprises, wild land firefighter support, FEMA-inspired waste water storage, rain water collection systems, oil and mining industries, as well as the maritime (ship board use) and defense industries. AIRE has built thousands of flexible water bladders utilizing industrial grade PVC materials. All bladders with a standard 2 each 2" fill / discharge female NPT flanges and a 3/4" NPT check valve vent. These collapsible water tanks are ideal for waste water storage or water recapture/water recycling, and come in a range of capacities from 25 to 30,000 US gallons. Need more information? Call us at 800-247-3846.