*PLUMBERSSTOCK EXPERT* responded:
Hi, there! We appreciate you for posting a question under this Dial 9446 1/4-inch Stainless Steel Ball Valve and Brass Saddle! This brass saddle fits 3/8-inch to 1-3/8-inch diameter pipe which will require you to pre-drill the hole, however, if you are looking for a self piercing valve, we found this Dial 9270 1/4-inch Saddle Valve, a self-tapping saddle valve attached to copper pipes with outer diameters from 3/8-inch to 1-3/8-inch. You may also check this catalog for more information. If you want to purchase the Dial 9270 1/4-inch Saddle Valve, just click the "Add to Cart" button, enter your zip code, and proceed to checkout. Thank you for visiting PlumbersStock.com! Have a good day!