Sir Lawrence was made by Pitco. They used two sizes of drain valves. The 1” and a 1 ¼”. All you need to do is measure across the thread portion of the drain to get the correct size. I attached the Pitco replacement valves below.
No, this 1" Fryer Drain Valve is not the one you'll want for your Keating 10x11 AA model fryer. You need Keating part #061884. We do not currently carry this part, but we special order for customers on a daily basis. Please give a member of our Tundra Restaurant Supply team at 1-888-388-6372, and we'll be happy to order the correct drain valve for you.