Add a 5 lb bag of custom roasted coffee to your parts order and get an extra 25% off our wholesale coffee prices!

La Marzocco B.1.004.3 GS3 STEAM VALVE S/S LEVER

Name: La Marzocco B.1.004.3 GS3 STEAM VALVE S/S LEVER
Brand: La Marzocco
SKU: LM:B.1.004.3
Price: 20.33 USD
Availability: InStock

$20.33

This part ships directly from La Marzocco and stock is not guaranteed. Lead time averaging 7 to 9 business days for ground shipments, 1 to 2 business days for Overnight.

If unavailable, the item will be backordered. If you have any questions check parts sheets below description. Please email or chat to confirm availability prior to ordering.

Description Details

Restore the premium feel and flawless steam performance of your La Marzocco GS3 espresso machine with the genuine GS3 STEAM VALVE S/S LEVER (Part # B.1.004.3). Engineered from high-quality stainless steel, this OEM lever assembly is the primary interface for activating your machine's powerful steam function. The ergonomic lever design provides superior control and a positive, tactile feel, allowing baristas to effortlessly feather or fully open the steam flow for precise milk texturing. Key features include durable internal components designed for high-cycle commercial use and exact factory specifications that guarantee a perfect fit and seal within the GS3's steam boiler system.

If you are experiencing issues like a sticky, hard-to-turn steam knob, inconsistent steam pressure, or a **leaky La Marzocco GS3 steam valve**, replacing the old assembly with this complete stainless steel lever kit is the definitive **solution for GS3 steam valve problems**. This component is critical for maintaining consistency; its smooth operation reduces wrist strain during busy shifts and ensures quick, reliable activation, which is vital for high-volume coffee service. Regular replacement of this wear-and-tear part prevents internal damage to the boiler fitting and maintains the legendary reliability La Marzocco owners expect.

Installation is straightforward for qualified technicians, and this stainless steel GS3 steam lever ensures longevity and resistance to corrosion in humid café environments. The precision-machined fit eliminates the risk of air leaks or binding that cheap aftermarket parts often introduce. Invest in the GS3 STEAM VALVE S/S LEVER (B.1.004.3) today to ensure your machine continues to deliver perfect, powerful, and precise steam for every drink, protecting your investment and optimizing your espresso bar workflow.

Descriptions are for reference only. We do our best to fill in the blanks when manufacturers don’t provide descriptions, but details can vary. We strongly recommend checking with the manufacturer for the exact part number you need. Ordering based on the part number—rather than the description—is the best way to ensure compatibility.

Frequently Asked Questions

Is this gs3 steam valve s/s lever compatible with my La Marzocco machine?

This Part #B.1.004.3 fits La Marzocco machines, including the GS3 series. Compatibility may be specific to the machine's production year and model. Please consult the technical PDFs and compatibility data on this page to confirm a match for your specific unit before finalizing your purchase.

Does this part fit any La Marzocco model not listed above?

Our current database shows fitment for the GS3 series. However, many La Marzocco components are interchangeable across different platforms. If you have successfully installed Part #B.1.004.3 on a model we haven't listed, please let us know so we can update our records for the community.

If you are unsure of the fit, do not guess. To prevent downtime, please view our Compatible Parts Diagrams to check the exploded view PDF for your specific unit, or message our parts team for assistance.

Is this La Marzocco part B.1.004.3 in stock?

Parts from La Marzocco including this gs3 steam valve s/s lever ship directly from their warehouse. Please email or chat to confirm availability prior to ordering.

Is this a genuine La Marzocco factory part?

Yes. Part #B.1.004.3 is a 100% genuine OEM component sourced directly from the La Marzocco factory. Using original parts ensures your equipment maintains its factory-spec pressure ratings and safety certifications.

What is the lead time for La Marzocco parts?

Lead times for La Marzocco parts typically range from 7 to 9 business days depending on availability. Next Day Air parts usually ship within 1 to 2 business days.

What is the warranty on La Marzocco parts?

All La Marzocco parts come with a 365-day manufacturer's warranty. Contact us for specific warranty details.

What is the return policy on La Marzocco parts?

All La Marzocco parts come with a 30 day return policy. Please see our refund policy or chat for more details.