a. Hose valves must be attached to the pump (and included in its price) as follows:—
For the 2 stream or 500-gal. pump, 2 hose valves.
For the 3 stream or 750-gal. pump, 3 hose valves.
For the 4 stream or 1,000-gal. pump, 4 hose valves.
For the 6 stream or 1,500-gal. pump, 6 hose valves.
These are to be 21⁄2-inch straightway brass valves, without cap, and similar and equal in quality to those made by the Chapman Valve Company, the Ludlow Valve Company, or the Lunkenheimer Company.
The hose-screw at end of these valves is to be fitted to a hose coupling furnished by the customer, or where this cannot be procured may be left with the thread uncut.
To accommodate locations where all the lines of hose must lead off from one side of the pump—makers can furnish a spool piece or special casting to which the hose valves can be attached—but this is an extra not included in the regular price.
43. Safety Valve.
Fig. 11.
a. A safety or relief valve of the Ashton, Crosby, American, or other make agreed upon in writing with this office, is to be regularly included in the price, and is to be attached to each pump; preferably extending horizontally inboard from base of air chamber, as shown in [Fig. 12], so that its hand-wheel for regulating pressure is within easy reach. This hand-wheel must be marked very conspicuously as shown in [Fig. 11].
b. This valve is to be set ordinarily at a working pressure of 100 pounds to the square inch, and is to be of such capacity, that when set at 100 pounds it can pass all the water discharged by the pump at full speed, at a pump pressure not exceeding 125 pounds per square inch.