View report page

21
Drains to be
trapped from
sewer.
By-law 4.—From this By-law it would appear
that the disconnecting-chamber must be constructed
under the vault, where there is one between the front
area and the sewer. We consider it far preferable to
construct the disconnecting-chamber in the front area as
being more convenient of access, vaults being frequently
used as coal-cellars, etc., and we think that the proposed
By-law should be altered to meet this point.
Ventilation
of drains.
By-law 6 (i).—A third arrangement for the purpose
of securing efficient ventilation of the drains
should be permitted (as it is often impossible to carry out
either of the two arrangements provided in the By-law),
viz. : the provision of two suitable ventilating pipes, one
from the upper end of the drain and one from the lower
part near to the trap, both carried up above the ridge of
the roof.
By-law 6 (ia).* —The words 'Such opening shall also
in every case be situated on that side of the trap which
is the nearer to the building,' should be 'The point at
which such opening communicates with the drain shall
also in every case, etc.'
By-law 6 (ib).*—The same alteration is required as in
6 (ia).
By-law 6 (iii).—It is not clear whether, for instance,
a 6-in. drain must have a 6-in. pipe to ventilate it, or
whether it may be ventilated by means of a 4-in. branch
drain with a 4-in. ventilating pipe.
Soil-pipes.
By-law 8.—After the words ' he shall construct
such soil-pipe so that there shall not be any trap
in such soil-pipe or between the soil-pipe and any drain
with which it is connected,' we suggest that the words
*With reference to Air-Inlets.