谢谢柠檬，你真是什么都懂

我们是真喜欢这个?房子，如果没有这个问题，早卖掉了，seller倒是愿意出钱，这下心里有数了，至少要一万。

这是seller在Disclosure 说的：

Water pipes are polybutylene, pipes made of polybutylene start to leak within 22 to 30 years.  A class action lawsuit against polybutylene manufacturers was settled for $950 million in 1995. Within the next decade, builders stopped using the material for pipes because of the potential hazard and shifting building codes.  Replacing the pipes costs several thousand dollars. Predicting when they’ll break is “a crapshoot,” Hunt said, because they deteriorate from the inside out.  If your polybutylene water service line starts to leak, Hunt recommends replacing it entirely, because repairs are expensive and will only last so long. If you have more easily accessible polybutylene pipes in your home, you could opt to repair them instead of replacing them.