Cleaning the wash tank when it's mostly clean

Printing in clear for the first time in over a year today, I realized my wash tank, while pretty clean and with fresh IPA, it’s not really clean. Lots of little cured resin bits of various colours sticking to my clear parts.

I started hand-filtering the tank then I realized I have a small 12V electric pump. So I hooked it up to my filter stand, and voila. All the little bits filtered out in just a few minutes.

Just thought I’d post this in case it’s helpful.

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Isn’t this an explosion risk at all?

I don’t see anything explosive. We’re dealing with a flammable liquid, so there is that risk, but that’s with or without the filtration system.

This is a great idea. I might buy one of those stands to hold a filter cone and use the battery powered pump that came with my 3L!

What pump did you use please, is it self priming?

It appears you also had the Wash running at the time, I presume that was beneficial to agitating the liquid

Now if only we could find some flocculant that would get the resin out of suspension and filter it we could go a long way to cleaning up the IPA further :slight_smile:

I got mine off Amazon,

The one I own has two downsides (1) it’s not available anymore, and (2) it does not plug into a wall outlet, i.e. you’ll need to find a 12v DC source with the appropriate amperage.

This one appears to be the newer model from the same company:

I imagine if you look around a bit you can find one that plugs into a wall AC socket.

Yes, I had the Wash unit running. That’s to help get all the little bits floating around, rather than sitting in corners of the tank.

Thanks, have ordered similar/same spec one from Amazon over here so good to try… I’ll also use it for manual washing too I think as form wash doesn’t quite get into all the nooks and crannies particularly around dense areas of supports and anything cupped :slight_smile:

Yeah, I have used this one. The little diaphragm pump works really well for sending water from my fish pond to a micro-irrigation system in my garden. The current draw is less than 3 amps, so it is suitable for running on a small (18 Ah, 12 v) solar-powered battery. The self-priming feature is excellent as it can pump air or water, and this takes away the frustration of the priming problems with a small centrifugal pump.
I would have given the pump 5 stars, except for a problem I had with the pressure sensor. This sensor (in the box to the right of the pump) is designed to stop the pump if a pressure higher than the maximum (about 2.5 bar) is sensed. With my irrigation system, the sensor was switching on and off rapidly (about 3 times per second), even though the system is all at ground level. After a while, the pump/sensor quit entirely and it was impossible to wake up the pump. I then shorted out the pressure sensor and the system now works fine.

Only issue I have is that the pump is really pretty strong, really good flow rate for filtering - however the manual washing idea is more useful at the moment, but hard to get right due to the power of the pump.

I’ve got it piped to an air blower nozzle (wide bore) for manual washing and it’s pretty hard to regulate the flow - if its slow enough not to splash everything, the pump pulses off and on so it doesn’t really flow evenly, and you have to be really careful with the trigger!