A white plastic T-shaped espresso machine part is shown at an angle, with 1st Line Equipment logo partially overlaying the image. © 2025 1st-line.com

Air Release S-2 Valve for Ulka Pump

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$13.04

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Ascaso I..693 S2 Valve I..693 S2

This part (I..693) is for most Ascaso espresso machines. This includes the Arc, Basic, Dream, and Steel models. It connects to the vibration pump (I..675). This is also known as the air release valve for ULKA pumps. It is normal for some leakage to come out of the T portion that usually returns to the reservoir or the drip tray.

Reference Part Numbers. This part may be a suitable replacement for the following part numbers:
Bezzera 49BQ046
Ceme 1.06.209.05/B, 1.06.210.05, 1.06.210.05/L, and 10621005L
Grimac 1200300005
Lelit MC111
Pavoni 453204 and 49BQ046
Rocket 49BQ046 and C200002112
Ulka 1.06.209.05/B, 1.06.210.05, 1.06.210.05, 1.06.210.05/L, and 1.06.210.05/L
Vibiemme 49BQ046 and VALVCONTRPRES

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Please ask follow up questions as a new question. Submitted questions will be first reviewed, answered, and lastly publicized.

    Hello. I have a Lelit PL91 (Victoria). When I turn on the machine, as soon as the bolier reaches temperatures above 140F, I can observe that hot water starts to flow out from the MC111 back into the water tank. I searched Lelit MC111 from your website and this comes up. I cannot find an original Lelit MC111 in your website. Is this a direct replacement of Lelit MC111? Can I use this part on PL91?
  1. 0 votes
    Q Hello. I have a Lelit PL91 (Victoria). When I turn on the machine, as soon as the bolier reaches ...... Read more answer now
    Asked by Peter on May 19, 2024 12:05 pm
    Answered by the admin

    As long as it looks the same, then yes. Lelit has and can change parts without notification to us or customers. Hence, this is why we ask that customers please research by part number, then also check their machines to make sure the part looks the same.

    Lastly, this part may have failed, but there be other issues causing failure, and these issues can make a new part fail. some of these issues may include, but are not limited to boiler overheating, limescale, particles in tank, resin from water softener holding valve open, etc.
    2. Hi, I have a uno steel prof. When I start the pump for coffee, I see a lot of water coming out of the pipe connected to this valve going back to the tank. I feel like the pressure and the water coming out from the boiler takes more time than before. I entirely took down the boiler and cleaned it up but I steel have the issue. I also double checked the expansion valve (i.1117) What could the cause of this ? What part could I replace ? Thanks !
  2. 0 votes
    Q Hi, I have a uno steel prof. When I start the pump for coffee, I see a lot of water coming out of...... Read more answer now
    Asked by Julien on October 11, 2022 11:07 pm
    Answered by the admin

    It may be a faulty air release valve or the OPV valve.

Mark G. from United States (US) purchased

Lelit MC047Sil 57mm Silicone Portafilter / Grouphead Gasket - PL41/PL041

2 hours, 11 minutes ago

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A white plastic T-shaped espresso machine part is shown at an angle, with 1st Line Equipment logo partially overlaying the image. © 2025 1st-line.com
Air Release S-2 Valve for Ulka Pump

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