Bigger pipe has more surface area in the joint, needing a slower cement, to get the joint together before it sets...loach43;2651832; said:Yessirs. Purple primer followed by clear pvc cement. I just realized that I have two types here. Been using the medium and it's fine. The 'regular' hasn't been opened yet. Wondering if one is better than the other
edittttt....One is meant for sch 40 pipe up to 6" and the other up to 4". I need to start looking at the directions.


