old school combo valve, comes with cone fittings that you can jamb into fuel lines. Were only talking 8 psi tops. HF has them for $13 with a bunch of fittings. doubles as a big vacuum gauge.
Same good ol junk I got! And, they work. I hate China, but Sometimes, I wouldn't HAVE a darn tool for that one time, or infrequent use stuff. And 20 bucks for a 12 pak of 1/2" impact sockets is hard to beat. Especially since Craftsman went S