Trailer pipe

Inspected a house 1050 sqft early 60’s and it had this piping underneath kitchen sink. I think its piping used in trailers. No cut off and i believe this material is subject to leaking. Any help

http://polybutylene.whocanisue.com/

http://www.polybutylenelawsuit.com/pictures.htm

Thanks, Chris. I saw the PB and a red light went off. Thanks again