CEMENT GROUT.  Ordinary concrete grout, using a 4:1 ratio of clean sand to Portland cement, has been the usual method of securing valves into pipes or headwall structures. The bore of the pipe should be roughened, cleaned and wet with slurry, before applying the grout and fitting the valve. Packs of epoxy grouting mix are also available, and may be preferred.

AEROSOL GROUT.  Another method, becoming popular for smaller valves, is the use of polyurethane foam, applied by aerosol can.  Selleys Space Invader, 500g  is convenient to use, and has proven satisfactory for operating heads to six metres.  When used for heads in excess of three metres of off-seating pressure, dowel bolts should be used, extending through both the spigot and wall of the pipe.
Carefully follow instructions on the container, particularly with regard to skin and eye contact and inhalation of the vapours.
One canister of polyurethane is sufficient to grout a 300mm valve, two packs should be sufficient for a 450mm valve.  Cure time is; tack free - twenty minutes, fully cured - five hours.  Not economical  for use with larger valves.

VERTICAL ALIGNMENT.  If the control column has been removed for convenience in grouting, take care with vertical alignment of the valve frame, to ensure the column will subsequently align with upper fittings, particularly on deep installations.  See also Extended Columns.