. B: y- V- {' z v+ U' D% g+ q(DIY) buy at HD, apply leak seal from inside OR ! n+ s$ R$ ^1 H4 c4 X2 }: t7 B ) J! K1 U( p1 l/ r3 L# e% E) Rhire some professional company that armed with high pressure injection equipments to do the leak plug.
# O) W* g4 M5 q+ W( N) Ushould work, high pressure injection is the best and have lifetime warranty. 1 ?( D4 [! K# Y& _% W0 D 1 l5 Q4 T) b* E |7 T5 y( [' A: |0 |hairline cracks not going all the way through wall is not unusual, # H" _8 o6 ]" U) h; x
1 i( [! {% t |' d
big crack is rare, if possible, I rather back off