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The original ONA Puller did not work on the 1222 (Posi-temp). We recently came out with an add on tube to rectify this.So, my question for the professionals is how much would a plumber have charged to replace this cartridge? I imagine they would have an ONA (Lasco) puller, which would have made this easy, but I didn't want to invest in one.
Here is the video.