*PLUMBERSSTOCK EXPERT* responded:
Thank you for your interest in the Pfister 920-102A! According to the manufacturer, the pipe nipple needs to be 3-7/8 inches to 4 inches in length. Once you’ve made your selection, always remember to click Add to Cart to confirm your order, enter your zip code and you’ll be all set! For availability inquiries, or to better understand lead and ship times, please contact one of our knowledgeable customer service representatives @ 435-868-4020 between 8:00 AM to 7:00 PM MT or through e-mail @ firstname.lastname@example.org. You can also sign up for our Newsletter!