opinions wanted regarding overflow for 150 gallon

[smokinreefer]

i wouldnt go down to 1".
use 1 or 2 1.5" bulkheads.

noise is minimal, it is basically a durso standpipe, only now it is outside the tank.

i use black flex hose from the drain to the sump...thus i get a smooth curve down to the sump.

for the inside of the bulkhead you just need a 90.
for the outside, i used a "street tee", threaded, but a normal "tee" is fine as well. and you'll need a cap, for the top of the "tee" (dont forget to drill a small hole on the top of the cap, for adjusting the air for the durso)
and youll need a barb fitting for the drain hose.

i bought my black flex hose at HD, its where all the tubing is, they have a package that comes with 25' of the flex hose, a 1.5" barb and a hose clamp for ~ $15. way cheaper than buying the pool/spa flex hose, barb and clamp seperately.