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  1. Plumbing
    Does anyone know if the Watts 1” N45B is compatible with the 1” N45B M1? I tried the Wilkins NR3XLR and the threads on the side before the regulator was slightly smaller than the existing union. So I had to put old regulator back on. In the mean time I'll order the N45B M1 but I'm trying to...
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