It's a sealing element in fluid-power systems. It's normal to deform when compressed, but due to the pressure,

It's normal for the ring to deform when compressed, but due to pressure, heating, and lack of lubrication, it could get dry and shrink causing your machine to leak.

Recommendations

Average: once a year or when it's discolored

Watch "How to clean your Saeco brew unit" video on Youtube. 

Buy the Saeco kit for brew unit" for $28.50 (12%disc)

It's suitable for:

GAGGIA: ACCADEMIA, BRERA, NAVIGLIO, PLATINUM VOGUE, SYNCRONY LOGIC, TITANIUM, UNICA.

SAECO: EXPRELIA, INTELIA, MAGIC, MAGIC-ROMA, MOLTIO, ODEA GIRO, ROYAL NEW, ROYAL PROFESSIONAL, ROYAL-CAPPUCCINO, ROYAL-CLASSIC, ROYAL-NEW, ROYAL-OFFICE, ROYAL-PROFESSIONAL, STRATOS, SYNTIA, TALEA, TALEA GIRO, XSMALL.

SAECO (Vending Machine): 7P, 8P, AMBRA, AMBRA VE, ATLANTE, COMBI-SNACK, CRISTALLO-600, FS400, GROUP500, QUARZO-500, QUARZO-700, SG200E, SG500, SG700.

OLD PART NUMBER NM01044

NEW PART NUMBER; 996530059406