Combination Inlet Tee For R-12 And R-134a For 15100 / 15200 Series Vacuum Pumps. Convert your pump to R-12 and R-134a. Solid brass “tee” replaces inlet fittings on pump; includes a branch with a ¼" MFL fitting for R-12 (and other refrigerants) and a branch with ½" Acme fitting for R-134a.