Things Nullifying An Ablution

It is written in the book Halabi: "In Hanafi Madhhab [1], seven things nullify an ablution:

Firstly, everything excreted from the front and rear organs, for example breaking wind, breaks an ablution. Only the wind coming out of a man's or woman's front does not break an ablution. This happens with very few people. The worms coming out of the mouth, ears or a wound on the skin do not break an ablution. When the point of an enema or a man's finger is inserted into one's back and taken out, if it is moist it breaks an ablution. If it is dry, it would still be better to renew the ablution. The case is so with everything that is partly inserted into the anus. If something is inserted and taken out wholely, it breaks both an ablution and a fast. If a person's hemorrhoids come out and he drives them back in with his hand or with something like a cloth, his ablution will be broken.

The second group of things breaking an ablution consists of those unclean things coming out of the mouth. Of these, vomit and thick blood; blood, food and water coming out of the stomach break an ablution when they amount to a mouthful. They all are najasat-i ghaliza (strong pollutant).

Thirdly, blood, pus, or yellow liquid issuing through the skin, and colourless liquid issuing painfully break an ablution in Hanafi. The fact that these do not break one's ablution in Shafi'i and Maliki is written in the Persian book Menahij-ul-ibad.

The fourth cause that breaks an ablution is to sleep, in all the four Madh-habs.

Fifthly, fainting, going crazy, or having an epileptic fit breaks an ablution. Being as drunk as to waver when walking breaks an ablution.

Sixthly, laughter during salat [2], including ruku's [3] and sajdas (prostrations), breaks both the salat and the ablution. But it does not break a child's ablution. Smiling in salat breaks neither the salat nor the ablution. When heard by those who are near one, it is called laughter. When one does not hear one's own laughing it is called smiling. If no one but the person who laughs hears it, it is called dahk, which breaks the salat only.

The seventh cause is Mubasharat-i fahisha, that is, when a man and woman physically rub their private parts (saw'atain) on each other. In this case, the ablution of both the man and woman is broken. In Hanafi, touching a woman's skin lustfully does not break an ablution.

[1] madhhab: all of what a profound 'alim of (especially) Fiqh (usually one of the four-Hanafi, Shafi'i, Maliki, Hanbali) or iman (one of the two, namely Ash-ari, Maturidi) communicated.
[2] salat: i) prayer; (with salam)= salawat; ii) ritual prayer of at least two rak'as; "namaz", in Persian; salat janaza: funeral prayer.
[3] ruku: bowing during the prayer of namaz.