Espresso PartsSKU: V_3540

Sirai P303 20A Pressurestat

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Only specifically listed (with the brand and models that we carry) for the Rancilio Classe 5 single groups and the Classe 7 S and Leva models. They are also apparently used in Bianchi and Fiemma equipment.

This is a commercial pressurestat for 110~120/220~240V equipment. It is the part that regulates your boiler heating via a diaphragm that expands and contracts as the boiler steam pressure raises and lowers, activating the contacts and sending a signal to the heating element telling it to turn on or off. This is the three-pole version, model P303T01. One of the major differences with this version compared to others is the lower amperage rating. This switch can only function with 20 amps or less! Additionally, the wiring on this version is connected through the top portion of the switch. There's a snap-on lid with two press-in tabs on the upper sides of the cover. Rancilio #34200109.

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We guarantee a full refund or replacement of all defective products at no additional cost to you. Most electrical items have specified limited warranties. If an electrical device fails to function due to manufacturers defect, Espresso Parts will repair or replace the device (TBD). *Important Note: All Special Order Items, Equipment, Electrical Items (scales, heating elements, switches, flowmeters, vibratory pumps, thermostats, etc.), Pump Heads, Solenoids, Custom Work and Books are NOT eligible for return. All sales are final on this merchandise. Learn more on our return policy page.
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Related Documents

Factory specification sheet here.

Customer Reviews

Attention CA Residents: Prop 65 Warning

WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to

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