Rules regarding Wudhu

305. If a person doubts too often about the acts of Wudhu and its conditions, like, regarding the water being Pak, or it not being usurped, he should not pay any heed to such doubt.

306. If a person doubts whether his Wudhu has become void or not, he should treat it as valid. But, if he did not perform Istibra after urinating, and performed Wudhu, and thereafter some fluid was discharged about which he was not sure whether it was urine or something else, his Wudhu will be void.

Rules about Utensils

231. If a utensil is made of the hide of a dog, or a pig, or the dead animal (not slaughtered lawfully), it is Haraam to eat or drink anything from that utensil. Also, that utensil should not be used for Wudhu and Ghusl, and for other purposes for which only Pak things should be used. And an obligatory precaution is that the skin of a dog, or pig or a dead animal, should not at all be used, even if it is not in the form of a utensil.