The white vitreous china toilet tank meets the Watersense 1.28 GPF (gallons per flush) flow rate. It is insulated to protect against condensation in basement installations. It is 1 of 4 components needed to complete a Saniflo upflush bathroom system. In addition to this toilet tank you will need to purchase separately a toilet bowl Model No 003 (SKU 497193) round or Model No 007 (SKU 455073) elongated, Sanitop Model No 17 (SKU 455064) macerating pump for discharging a half bath lavatory and toilet combination or Saniplus Model No 002 macerating pump for discharging a toilet, lavatory, urinal and shower or bathtub. Also available is Model No 030 (SKU 449312) 18" extension pipe which allows pump and plumbing pipes to be hidden behind an access wall. The complete Saniflo bathroom system allows you to add a bathroom up to 12' to 15' below the sewer line, even up to 150' away from a soil stack. Nominal dimensions: 26-1/2" L x 16-3/4" H. Toilet seat, lavatory, urinal, shower, bathtub, faucet and plumbing components sold separately. Installation video available on youtube.