*PLUMBERSSTOCK EXPERT* responded:
Hi! Thank you for trusting PlumbersStock with your plumbing concern. Yes, the Mueller 1" stop & waste valve has a drain port which drains the water out of the supply line when the valve is shut off. To start placing an order, just click Add To Cart and fill in the required fields. Should you have further questions, please ask away! Thank you for visiting Plumbersstock.com. Have a great day!