This specific model is engineered for horizontal mounting

GE M7931 60 HP Severe Duty Motor

Sheet Size 12-1/2" x 16-5/8"

Model has extended threads on the inlet side of the valve for mounting through a tank wall and it comes complete with a sealing washer and jam nut

Number of Inch Threads: 21

Acorn Stainless Steel, Back, Prison Toilet, Wall, 12 in Rough-In - 1675-W-1 Sinks-Lavatories This specific model is engineeredPrison Toilet; Toilet Mounting Style: Wall; Toilet Bowl Shape: Elongated; Flush Valve Location: Concealed; Flush Valve Type Included: None; Gallons per Flush: 1. 6; Rough In: 12 in; Spud Location: Back; Spud Connection Size: 1 1 2 in; Ligature Resistant: No; ADA Compliance: Yes; Plumbing Brand: Acorn; Finish: Satin; Color: Stainless Steel; Includes Toilet Tank: No; Includes Flush Valve Cover: No; Manufacturers Warranty Length: 1 yr; Toilet Material: