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(DIY) buy at HD, apply leak seal from inside OR / n7 a; G$ m' V# Z( v6 f `" z: ?+ j
hire some professional company that armed with high pressure injection equipments to do the leak plug.
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should work, high pressure injection is the best and have lifetime warranty. 3 |- E$ M- S6 `6 U9 T I ' ^" P3 S h$ b/ _* N: @! }& fhairline cracks not going all the way through wall is not unusual, 8 }* q/ _/ C1 G
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big crack is rare, if possible, I rather back off