The GB-250-2 Series uses a set of two taller "Legacy" tank bodies with the Schier pioneer head logo molded into the top of the tank and use the SR24 and LR24 risers. The NEW GB-250-B uses one shorter/cylindrical tank body which uses the FCR2 risers.
Pumpout Port Compatibility
Use pumpout port PP2 for legacy GB-250-2 Series models (pre April 2019) with serial number "2019 - 6321" or below. Use pumpout port PP3 for legacy GB-250-2 Series models (from April 2019 to April 2020) and new GB-250-2 Series models (after April 2020).
This product can expose you to chemicals such as Lead, Carbon Black, N-Hexane, Methyl Isobutyl Ketone, Nickel, Bisphenol A, Naphthalene, Talc, Vinyl Chloride, Formaldehyde (gas) and Titanium Dioxide, which are known to the state of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov/product.