rough-in pipe spacing for bathroom sink

amakarevic

my book says keep 4" between the hot and cold pipes roughing in for a bathroom sink. however, i am inclined to leave more space, maybe even as much as twice that much, because there will be 1.5" PVC in between them and i don't wanna keep it to close to copper to avoid the danger of melting PVC when sweating the copper pipe.

so i was wondering if there are any other issues to keeping the hot and cold farther apart than what the book/code says for comfortable spacing and having more room to work with. i like to use MAPP gas, that thing burns real hot and i'm pretty sure i would melt PVC from just being close to it.

thanks

autx790

Could you not put a thermal barrier between where you are soldering and the pvc? Something to block the heat. Or could you put the copper lines in first and then run your pvc?

DannyT

for a regular lav we used to set the waterlines at 21 inches to center off of the floor and 4 inches to the right and left of center. the drain we centered on the sink at 19 inches to center off of the floor. pedestal sinks were different. is this a free standing sink or a drop in?

amakarevic

i think it will be an undermount vanity

DannyT

the maybe drop the drain down to 18 inches. we always made them 19 so we didnt need an extension on the drain.

amakarevic

does that means 8 inches apart ?

DannyT

for the waterlines 8 inches apart. 4 inches to either side of center of the drain.