Two people each pour exactly one and a half lugin of drawn water into the same mikveh. Does this disqualify it?
Halacha 2 rules that when two people each pour a log and a half, the amounts combine to constitute three lugin and disqualify a mikveh that lacks 40 se'ah.
Question 2
A leather pillow is immersed in a mikveh that contains exactly 40 se'ah. When the pillow's edges are lifted out of the water, what happens to the water trapped inside?
Halacha 3 states that when one lifts the edges of a leather pillow out of the mikveh, the water inside becomes drawn water. To avoid this, one should immerse it with a hole.
Question 3
A cistern originally filled with drawn water now has a canal of rainwater flowing through it. When is it acceptable?
Halacha 6 states that the cistern remains unacceptable until it can be calculated that not even three lugin of the original drawn water remain.
Question 4
A soldier's army marches through, and their hands and feet splash three lugin of water into a mikveh. Is the mikveh disqualified?
Halacha 8 explicitly rules that water splashed into a mikveh by a passing army or animals is acceptable and does not disqualify the mikveh.
Question 5
Less than three lugin of impure drawn water fall into a mikveh. What is the effect on immersion in that mikveh?
Halacha 9 states that less than three lugin of impure drawn water makes challah and terumah uncertain, but does not invalidate immersion itself.