I bought a house with an 250+ gallon rain barrel that is exclusively used to pump water to the lawn and garden irrigation system. No human or other animal consumption, no swimming pool or hot tub, no water play, no car washing. Because the water coming from the gutters contains all sorts of impurities, there is a whole-house type water filter between the rain barrel and the pump, mostly to protect the pump and the sprinkler heads. Everything works very well.
The problem is that the previous owner used a 30-micron filter cartridge (pleated) that quickly clogged up, reducing water flow to the point that the sprinklers would no longer rise. A new filter brought everything back to normal.
But, it seems that 30 microns is overkill for this application. I can get a 100 micron filter, but even that seems to be overkill. I just want to remove anything that would clog the pump or sprinkler heads. Sanitation is irrelevant.
Any ideas for a substitute cartridge better suited to irrigation applications?
It's a common 10 x 4.5 filter with a 1-inch center hole.
UPDATE: I didn't say it explicitly, but all I have against continuing to use the 30 micron filters is the expense. But, I have a filter cleaning kit I bought for our spa filter, and I'm going to try that. Also, I've since learned that there are lots of contaminants in roof runoff that I don't want on my garden edibles, and, while even a simple 30 micron filter won't eliminate all of them, going to a coarser filter seems counterproductive. I'll post here whether filter cleaning was successful. (Successful means that the water flow is restored to what it is with a new filter, or nearly so.)