Universal 3/4 F X 3/8M reducer fitting  €5.99

Details:

Brass 3/8'' x 3/4'' fitting  

You will need Teflon thread tape to avoid leaking and black O ring gasket - see below

Size: 3/8" x 3/4" male
 

Fits:

•  Joins 3/8 fittings - such as water inlet pipes
•  Joins 3/4 fittings - such as water inlet pipes