_a._ The maker must warrant each pump built under these specifications
to be at time of delivery, in all its parts, strong enough to admit
of closing all valves on water outlet pipes while steam valve is wide
open and steam pressure eighty pounds, and agree to so test it before
shipment from his works.
_b._ The pump must be warranted so designed and with such arrangement
of thickness of metal that it shall be safe to instantly turn a full
head of steam on to a cold pump without cracking or breaking the same
by unequal expansion.