Good news: you don’t need a engineering degree. Just hand-tighten the cap onto the injector body. No wrenches, no Hulk-strength moves—just gentle, firm twisting.
If it feels cross-threaded, stop. Back up and try again. Cross-threading is the enemy of happy plumbing. It’s like trying to shove a square peg into a round hole—it’ll work for a second, then break your heart.
Once it’s on, check for leaks by running the system. If you see a tiny weep, give it a quarter-turn more. If it still leaks, your O-ring might be tired—replace that too.
