I just added a home brew filter pressure gauge to my CV-1800. I used 1/4" clear tubing with Marvel Mystery Oil such that it won't freeze and hopefully won't evaporate too rapidly. I made a scale on my computer in 0.1" increments of H2O increased in size by 1/.0876 to account for the 0.876 specific gravity of the oil. This gives a little better resolution on the readings.I covered the scale with lexan to protect it. I tapped into the transition by drilling a 3/32" hole in the MDF and overlaying that with a PVC piece tapped for a 1/4" MIP to barb adapter. I'm adding the pictures in the gallery section. It's reading about 0.35" of H2O.
bababrown
bababrown