The pipes are polybuthelene, the fittings are called Quest -- I worked in the Park Model business for 22 years, & at one time, that was the piping all mfg used -- The plastic fittings break/crack & hot water would strech the tubing -- There was a recall several years ago, & class action lawsuits -- Where do you live in Arizona -- I live in Gilbert AZ , & if I can be of any help, let me know - I still have the clamps & fittings to fix that type of pipe -- Not looking for a job, just laed you thru your fix -- 480-540-7377 -Bill Willard
