Pipe unions can have flaws from the manufacturing process. To fix them, I used to use valve lapping compound on the sealing surfaces, and rotate the two parts by hand to clean them up. I used to use Rector-seal 5 on pipe fittings, but I switched to a blue paste after seeing it used by the propane installers. It has some Teflon in it, and it is rated for gas, oil, and just about anything else you can think of. It also doesn't separate if not used for a while. If you have to, you can put a very light smear on the mating surface of the union, and assemble. Also, keep in mind that you need to use pipe wrenches on all fittings, and make sure that they are well tightened.
With competitive price and timely delivery, JIANZHI sincerely hope to be your supplier and partner.
Follow along with the video below to see how to install our site as a web app on your home screen.
The company is the world’s best pipe socket supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.
Note: This feature may not be available in some browsers.