Question: Where can I get Tube Adapter (3/16″ TUBE X 1/4″ MPT)  RPF689 for Tuttnauer Model ?
Answer: You may get the Tube Adapter (3/16″ TUBE X 1/4″ MPT)  RPF689 for Tuttnauer Model for Tuttnauer  Sterilizer model HERE

Details
1/4 MPT x 3/16″ Compression Tube
Material: Brass
Includes: (1) piece each: Compression
Nut and Compression Sleeve
Fits: Pressure Gauge (Test)

Thank you –
~Shlomo Savyon
1-800-762-1586
Your Sterilizer expert