Drawing 164 shows the brew house in detail. The designs are for alterations to an existing room, probably part of the office range. The copper is shown to a larger scale, with a hole specified as large enough for a man to crawl into for cleaning. An elevated platform surrounds the copper, supporting shallow coolers (for cooling the wort) and a mash tub. On the ground directly beneath the mash tub is an underback, situated to receive the raw wort dripping from above. The underback in this drawing holds 6 hogsheads, though it can be expanded to hold 8½ hogsheads (hogshead is a liquid measurement). Above is a 'boiling back'. The roof is hipped and has a 'new cistern' over the 'present cistern', with service pipes linking both to the copper.