Rebuild service for combination/proportioning valve

[slikside]

I used these guys up the road in Orange, CA about 10 years ago. They rebuilt my vacuum booster, master cylinder, both front brake calipers and prop valve. I was very happy with their work and customer service. As for the topic of this thread, however, my original prop valve leaked ever so slightly, and I couldn't get it to stop. They sent me one of their new brass valves, and I haven't had any problems since. Maybe not every valve is able to be rebuilt. IDK. But I would use them again in a minute.

http://www.abspowerbrake.com/