Features

• Springs are made with high-quality 304 Stainless Steel for long-lasting performance.
• Easy to install - Requires only a 10mm wrench, Screw Driver, and 10 minutes of your time.
• This spring will allow you to achieve the standard 9 Bar of pressure for optimal espresso extraction or lower for pressure profiling.

​Spring pressures

• The 9-bar spring is great for general use and is the "industry standard" espresso extraction pressure.  Most people will use this one.
• The 6.5 bar spring is good for some espressos, and lower-pressure extractions are being used in many coffee shops now.  It's worth trying this one, as you may prefer the taste and mouthfeel that lower-pressure extractions produce.  Some careful installation of the spring and replacement of the floating valve seat may be required with this one, otherwise, you can find that steam pressure will leak out of the valve and reduce your steaming power.
• The 5 bar spring is very low - and again it's great to try it - but this one is quite low pressure and can cause some challenges when you steam; as the steam pressure can escape from the OPV if it exceeds 5 bar.  Great for straight espresso or Americano lovers though.

💡 Before you buy - check that you have the PVC OPV- see the image above or left.

1. Remove the lid from your espresso machine (the two small screws at the rear of the machine, within the black plastic lid)
2. Confirm that your OPV looks like the one shown above or left
3. Black plastic valve - with 2 silicon pipes attached.