1/4" Mater Pressurestat
PRESSURE SWITCH XP110 0.5-1.5 BAR 1/4". Connection ø 1/4"M - 16A 250V, preset 1 bar. It should be noted that these pressurestats were not designed for successive or frequent adjustments, and doing so will significantly shorten the life of the part. This is the pressurestat currently in use as the La Marzocco steam boiler pressurestat. It can replace pretty much any 1/4" Mater XP110 switch used in most applications. However it should be noted that we have had reports that the fitting on this version of switch using the XP110 coil are longer, ~13 mm, and will not seat properly on some manufacturers fittings. For a shorter thread version, see EK_316.
I took a chance knowing mine had a shorter barrel thread. However I was surprised that the interior diameter was smaller! Still it seated properly and has been working the last 2 weeks. The Volante needs to run up around 1.3 bar and so far its good. Still, I go thru 1 a year on avg. Jim at 1st Line says you should descale the boiler at the same time to prolong the life of the Mater. Tempted to get the sucker PID'd and not have this part to replace. I paid extra for quicker shipping which was a waste because it still took about a week to get to me.
I love it when it works, but now I'm on my 3rd one. Pretty reasonably priced, so I keep ordering this one. But I do wonder if I shouldn't just bite the bullet and get an expensive one that might be more reliable.
Worked great on my Bezzera BZ02 , back at the proper pressure now
Great item. The price was right. Very fa shipping. Thank you Espresso parts.
This pressurestat worked reliably in my Expobar Lever for a few months. Now the boiler occasionally overheats and the relief valve has to let the excess pressure out of the boiler. It didn't last very long.