Coupling nut for DeLonghi Digital coffee machines

What is a hydraulic circuit nut

The hydraulic circuit nut connects and seals a hose, pipe or steam wand to a given fitting in the coffee machine. It ensures that pressurized water or steam flows only through the intended path and that the joint stays strong and tight even through repeated heating and cooling.

When the part stops doing its job

If the nut is worn, damaged or insufficiently tightened, the joint starts to leak. This shows up as dripping or leaking water or steam at the joint, a drop in circuit pressure, longer coffee brewing time, or a pressure-related error message. Sometimes you can also hear hissing from escaping steam.

Why you shouldn't put off the replacement

A leaking joint gradually damages surrounding parts through moisture and can cause corrosion or damage to nearby electronics. Replacing the hydraulic circuit nut restores the strength and tightness of the joint and prevents further loss of water or pressure.

How to choose the right part

Nuts differ in thread size and shape depending on the specific joint and coffee machine type, so check compatibility in the product table before purchasing.

Compatible with

• 1329 De Luxe
• 1329/1 Plus
• 1329/2 Digital
• 1385
• 1377
• 1315/4 Caffe
• 1315 Caffe
• 1330/3