wagoon 2,429 Posted August 3, 2016 Can someone identify the difference (if any) between these 2 power valves please. The thing I don't understand is that one has the numbers 3 5 3 stamped on it while the other one has 3 5 7, both have the letter A stamped on them as well. I'm guessing that they are both 3.5 power valves but the fact that they are stamped differently has me scratching my head wondering if there is something else to it. The double stamping makes it a bit harder to read this one Share this post Link to post Share on other sites
ando76 4,354 Posted August 3, 2016 The top one is a 3.5. The bottom is a 7.5 Share this post Link to post Share on other sites
gerg 10,871 Posted August 3, 2016 Every power valve I've seen has the vac setting stamped into one of the flats on the side. 65 = 6.5, 45 = 4.5, etc. Sent from my iPhone using Tapatalk Share this post Link to post Share on other sites
ando76 4,354 Posted August 3, 2016 All the ones I have bought of late have been stamped like the ones in wagoon's photos. Must be easier and quicker for them to stamp them like that than on the side like they use to. Share this post Link to post Share on other sites
wagoon 2,429 Posted August 3, 2016 Ok cool. Yeah Greg this one has no markings on the outside at all. Share this post Link to post Share on other sites