I just noticed the gauge you are using has a brass fitting. I would suggest caution, even if the brass is in an air space as condensation can still cause issues. A gauge guard can protect the gauge in these sorts of situations. Plast-o-matic makes a number of them, including some economy versions.I have been following this thread for quite a while now and would love to pick your brain about some of the finer details. I have made up a very similar unit over the past two months and actually got it online finally today. 10" x 2.4" reaction chamber with honeycomb-drilled pvc as a flow modifier with a 20" x 4.5" 5 micron pleated filter after. Have a Neptune 1/4" flow meter to keep an eye on my input/output flow rate with a Kamoer Pro 2 Doser pump controlling the Lanthanum dose every half hour. Waiting on a very similar pressure gauge as the standard oil filled pressure gauge from RODI setup doesn't give me any sort of readings even when the output was entirely clogged. What sort of pressure readings were you getting with the pleated filter setup?
Another question is: Did you ever play around with mixing up the reaction chamber in any more of an effective manner? My work got in a bunch of replacement lower plastics for RODI canisters that have been dropped over the years, and Im wondering if its worth trying to machine out that bottom nub to be able to use some sort of magnetic stirring action within the reaction vessel itself.
Second question is: Is it worthwhile to try adding a secondary filter chamber to REALLY make sure that all LACl percipitate is out of the water coming out of the rx? Thinking a final 10" x 2.5" 1 micron pleated filter would really polish it out as I build up stock of nicer fish after a bad crash last summer. Just worried about some of the tangs/ angels etc... with more complicated gills that I have interest in keeping once again.
Sorry if the picture is a bit confusing as its in front of my calc reactor setup as I temporarily use one of my dosing containers as a stand while i work something up for such a THICCCK filter. Glad to be rid of the socks though!
You may want to just remove it instead if it is failing to provide a useful reading anyway.