T>t RURAL NEW-YORKER 
443 
Farm Mechanics 
Water Supply for Summer Home 
I am interested in a pk je of ground in 
the mountains of Pennsylvania, on which 
I some day hope to erect a little Summer 
home. The logical sit* for the house is 
by all means on the top of the knob, com¬ 
manding a magnificent view, but there 
is no water quite near at hand. Situated 
about TOO and 1.000 ft. away, and each 
from 50 to SO or 00 ft. beloiv the site se¬ 
lected. are good springs. Is there any prac¬ 
tical difficulty in piping that distance and 
forcing tl*e water up to the house by means 
of a small gas engine and pump, and what 
would be the smallest size pipe that 
should be used in order to avoid clogging 
and choking with rust, and also to avoid 
too much friction in the pumped' water? 
Will galvanized pipe be more satisfactory 
than black iron? Would it be practica¬ 
ble to l?iE a concrete casing around a 
r~vall-sized water conductor pipe, such as 
is used in porch spouting, say about 2 in. 
in diameter? I can see how it might he 
done, excent as to joints, where one batch 
of cement stopped and the next batch was 
begun, but I don’t know how practical 
this is. m C. C. 
Philadelphia. Pa. 
There seems to be no practical diffi¬ 
culty in piping the spring water to the 
house under the conditions given. No 
doubt you will use a hydro-pneumatic 
system or elevated tank for the house 
supply, and to secure pressure .sufficient 
to deliver water in the upper rooms it 
will be necessary to carry a pressure of 
about 15 lbs., which will be equivalent to 
adding roughly 30 feet to the elevation 
that the water has to be lifted. This, 
with the pipe friction and actual lift of 
around 00 feet, will total up roughly as 
equivalent to about 150 ft. lift. 
It is assumed that only enough water 
is desired for household use. and the above 
figures are given on a basis of using a 
2-in. pump cylinder having an S-in. stroke, 
which when working at the rate of 40 
strokes per minute will deliver about 250 
gallons per hour. With this quantity of 
water flowing through an inch pipe the 
actual lift plus the pipe friction would 
be about as noted above and should be 
handled easily by a two-horse engine. 
The galvanized pipe is preferable for a 
line of this kind and should be used. 
Concerning the conductor pipe enclosed 
in concrete that you mention. I would not 
care to use it or attempt its use under 
the conditions outlined. Assuming a 
head of 150 feet, there would be a press¬ 
ure of approximately 75 lbs. per square 
inch on the lower end of the pipe, which 
would have to be resisted almost entirely 
by the conductor pipe, as the concrete 
casing would have very little strength in 
tension unless reinforced by a spiral rein¬ 
forcement. For so small a pipe it is 
doubtful if the concrete shell could be 
laid as cheaply as the water pipe could 
be bought, anyway, when labor is consid¬ 
ered. As this is to be a Summer instal¬ 
lation, care should be taken to see that 
the slope is uniform from, the cottage to 
the spring to permit perfect drainage and 
avoid burst by freezing. R. H. S. 
Water Pressure at Faucet 
How could I ascertain the pressure of 
water at faucet? At what pressure can 
a syphon be operated? G. R. s. 
Whitestone, N. Y. 
I assume that the device about which 
information is desired is an “elector” 
rather than a siphon, one of the devices 
used for lifing drainage water from a 
pump in the basement or emptying the tub 
of a washing machine by the use of water 
under pressure. If this is so. the pressure 
required will vary with the height to 
which the water must be raised. For low 
lifts the pressure needed is very little. 
They operate by means of a jet of water 
discharged at comparatively liigh velocity 
into the end of a larger pipe. To the side 
of this pipe, and opposite the jet. a suc¬ 
tion pipe is fitted which leads to the water 
that it is wished to raise. The slight 
vacuum created by the discht -re of the 
jet into the pipe causes water to be raised 
in the suction pipe and to mingle with 
the water from the jet. the whole issuing 
from the discharge pipe. 
.As to faucet pressure, this can be ob¬ 
tained by attaching a pressure gauge to 
the faucet, or if the height or head of 
water in the reservoir above the faucet 
is known, multiplying this distance in 
feet by .434 will also give the static 
pressure In pounds per square inch. Your 
Water Commissioner should also be able 
to give you this information. The follow¬ 
ing. taken from “National Pipe Stand¬ 
ards.” may also be of some help to you. 
It gives the flow of water in gallons per 
minute that may be expected through 35 
feet of %-incb house service pipe when 
the pressure on thejnain is as indicated. 
30 lbs. pressure. 22.5 gallons per minute : 
40 lbs. pressure. 2(1 gallons per minute; 
50 lbs. pressure. 20 gallons per minute; 
60 lbs. pressure. 32 gallons per minute. 
An illustration and description of a 
cellar drainer made from pipe fittings in 
the February number of Popular Mechan¬ 
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