tawilson
Platinum Member
I use the black poly, and if you look at the side of it, it will tell you the psi, I think I use 120, I have some 159 too( my number six key just stopped working). And at the pump house I constantly have 59 psi. (six key again) Just to babble on, my setup is a 1 1/4" line up the hill to a shallow well pump, which feeds two 3/4" lines which go around the campground. 2 of these lines meet at my upper bathrooms, using another shallow well pump to boost the pressure to 59 psi for the toilets.