So, when i re plumbed 80% of my house, i made sure every single joint was a soldered copper joint. Why?? In almost 20 years of pest control i have seen about 3 copper pipes gnawed. I have seen HUNDREDS of those nasty plastic push on things gnawed by rats and mice...They are nice and soft and give the rodent (latin word, from Rodere: to gnaw) plenty of purchase. They are not eating them, they are keeping their teeth short else they grow too long and the roden cant feed and ironically dies of starvation. I would NEVER use plastic fittings anywhere that rodents could access..Like in wall spaces, cavities, under floor etc.

