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Powerbuilt Cooling System Tester Kit

I haven't used the tester for some time and today it won't build up any pressure. The pump handle has no back pressure and seems to be loose inside the barrel. I opened the pump and the seal looks okay. I was going to add some grease to the seal but I'm not sure what type use. I was thinking of using silicone grease used for plumbing. Does anyone service these testers?


Having lost sight of some of my emails I am following up to see if your problem was ever resovled.  Please let me know.



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