Knowledge Base: TWIST not pressurizing
The most common question we are asked is, “Why won’t my TWIST pressurize?”. The most common answer is, “Have you checked to see if the small o-ring on the handle is still in place?”.
This o-ring sits on top of the handle, right at the front, where it ensures the flow of gas from the handle to the water bowl doesn’t escape. Unfortunately, if the o-ring has fallen out, as some of them do, then the gas will leak out, the water bowl won’t pressurize, and there will be a distinct lack of good quality espresso coming through.
Fortunately, not all is lost, and certainly not all the o-rings. There’s a small plastic bag included with every TWIST that has a full set of 4 (yes, four) small replacement o-rings. It also includes quite a few others, just in case.
The small o-ring can slip out when washing the handle, so please take care. Meanwhile, if you hear a gently hissing without the desired espresso, release the trigger, remove the water bowl, and check to see if that o-ring is in place.
Here’s a picture with the original size and a blow-up for easier identification.
No ‘spro? Check if the small o-ring on the main handle is in place. If not, there are spares in the bag.
If you need replacements, please contact us. The specifications for this o-ring are:
1.5mm x 3.5mm ID, Buna-N, Shore A: 70
They can also be purchased online from McMaster-Carr. Search for part number 9262K517.
Hi, Here’s a “twist” on not pressurizing…Mine will make an amazing double shot, then (immediately after) a good double shot and an ok third is very hard to achieve. Obviously I have a small pressure leak. If I make a shot and wait until the next day, there is barely any NO2 left. Any pointers in getting this corrected? I’ve changed ALL the O Rings and have a feeling that the spring or trigger may not be fully releasing as it will continue to push after letting go sometimes. Any thoughts or ideas?
My favorite way to make espresso!!!
Great site!!