sdr

I am a third year plumbing apprentice swapping out a vacuum breaker for a side job. I do commercial work and am not familiar with the irrigation supply line. 1” IPS PVC1120 SDR 21. (Photo below) I need to offset over bc the vacuum breaker outlet is on the opposite side of the old one. Not sure...

Is it OK to use 1 inch SD1R 160 PSI rated black poly for a drop in well or should you use a thick wall pipe like a SDR-7 160 PSI rated pipe? the first one is whats most commonly available around me for water systems. thanks!