Vixen Horns 1/2" NPT Male to 1/4" NPT Female Brass Thread Reducer Fitting for Train/Air Horn Tanks - Bundle of two fittings VXA1214-2

Maxline M8067 Elbow Fitting for 3/4-Inch Tubing

Anderson Metals 06120 Brass Pipe Fitting, Reducer Adapter, 1/4" NPT Male x 1/2" NPT Female Pipe

Maxline M8011 Equal Tee Fitting for 3/4-Inch Tubing

Anderson Metals Brass Pipe Fitting, 45 Degree Barstock Street Elbow, 1/2" Female Pipe x 1/2" Male Pipe

Maxline M8003 Straight Fitting for 3/4-Inch Tubing with 3/4-Inch Male NPT Thread

Maxline M8005 Straight Fitting for 3/4-Inch Tubing with 1/2-Inch Male NPT Thread

Hybrid Air-Hose,3/8x6FT. 1/4 in. MNPT Fitting Industrial Flexible Lead Hose,300PSI by Giraffe

Boeray 2pcs Brass Fitting, 90 Degree Barstock Street Elbow, 1/4" NPT Male Pipe to 1/4" NPT Female Pipe

Nigo JNS Brass Pipe Fitting, Hex Counter Sunk Plug, 1/4 Inch NPT Male Pipe - 5 Pack

Milton (S-684-4) 1/4" MNPT Male Tank Valve