h and broken off the corporation cock or destroyed the goose
neck. After the pipe is covered with 18 inches of refill and
tunnels have been filled, water can be run in the trench and will
settle the refill.

There are a number of special points concerning water services and
taps at mains that should not be overlooked. Take for example a
water service pipe which must be run through ground where
electricity is escaping under trolley tracks, around power houses,
etc. The electricity will enter the pipe and wherever it leaves the
pipe a hole is burned. The surface of the pipe in a short time will
be full of small pith marks and will soon leak. A good way to add
to the life of the pipe under these conditions is to make a star of
copper and solder it on to the pipe in the street. Another piece of
copper should be put on the pipe near the building. The electricity
will leave the pipe by way of the points on the star. This method
may not be a cure for electrolysis, but will add to the life of the
pipe. Another method employed is to put the pipe in the center of a
square box, then fill the box with hot pitch. When this is hardened
the pipe will have a covering that will keep out any moisture and
bar electricity to a marked degree.

MATERIALS USED.--Galvanized steel pipe does not last under ground.

Galvanized iron, heavy lead, and brass are used. Wooden pipes were
once used and stood years of service. No service smaller than 1-1/4
should be used.

When the water service pipe passes through the foundation wall, the
pipe should not be built in, but a small arch should be built over
the pipe or a piece of XX cast-iron pipe can be used as a sleeve
(Fig. 44).

[Illustration: FIG. 44.--Free space around pipe passing through
wall.]

POINTS TO REMEMBER.--

SEWER INSTALLATION

_First_, select good sound pipe and fittings.

_Second_, locate branch connection in street sewer.

_Third_, lay out run of house sewer.

_Fourth_, take out necessary permits from departments of sewer.

_Fifth_, dig trench in the street, then into the house.

_Sixth_, lay pipe and cement joints.

_Seventh_, refill trench, tamping every foot.

_Eighth_, cast-iron pipe for sewer is found under another heading.

WATER SERVICE

_First_, take out necessary permits.

_Second_, list material and deliver to job.

_Third_, lay out and dig trench.

_Fourth_, have main tapped.

_