This Toilet Waste Handling Kit includes an odor resistant polyethylene tank, macerator pump, activated carbon vent filter, vent fitting, level probe and indicator panel. All Kits are ISO/USCG compliant. Dimensions: 18.8″ x 15.7″ x 12.9″ The y-valve is be ordered separately in all versions. All part numbers are equipped with 12v electrical parts. Upon request all models are also available at 24v.