1/2 NPT Female Solid Brass Three Piece Pipe Union Fitting Adapter – compressor-source

Adapter Nipple 1/2 Male x 1 “ Female - Brass Adapter 0,5 inch x 1 “ inch Female Pack of 5 : Industrial & Scientific

1/4 NPT Female Solid Brass Pipe Union Adapter Fitting WOG Solid Conne – compressor-source

Husky 1/4 in. Female x 1/4 in. Female x 1/4 in. Male Brass Tee Fitting HDA30700AV - The Home Depot

1/2 NPT Female Solid Brass Three Piece Pipe Union Fitting Adapter – compressor-source

KOOTANS 66pcs Brass Pipe Fittings Assortment NPT Adapter Fitting, Reducer Bushing, Hex Nipple, Reducing Hex Coupling, Pipe Head Brass Plug Kit : Industrial & Scientific

Legines Brass 3/8 NPT Female x 1/4 NPT Female Reducing Coupling, Hex Reducer Coupler Adapter Pipe Fitting 1200psi (Pack of 2) : Industrial & Scientific

gotonovo Brass Pipe Fitting 1/4 Inch Female Pipe 1/2 Inch Male Reducer Adapter Air Hose Adapter Metal Pipe Adapter 2 Pack

1/2 NPT Female Solid Brass Union Tee T Joint Pipe Hose Connector New 2-Pack 684659148254

1/2 MNPT x 1/4 FNPT Solid Brass Bushings Reducer Fitting Adapter 281 – compressor-source

1/2 to 3/8 Reducer, Vfauosit 3/8 to 1/2 RV Faucet Adapter Brass Compression Fitting Faucet Supply Line Adapter for Plumbing Water Hose 2 Pieces

3/4 X 3/4 Inch Female NPT In Line Brass Compressed Air Check Valve CIL3434U USA £23.78 - PicClick UK

3/8 NPTF Female Union Tee Solid Brass Pipe Fitting T Joint Hose Conne – compressor-source

1/4 NPT Female Solid Brass Three Piece Pipe Union Fitting Adapter 104C

Water Source 1-1/2 in. Brass Male Insert Adapter MA150NL - The Home Depot