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Spectrapure 100 GPD Reverse Osmosis Unit for aquarium fish tank - $40 (South Loop)
condition:
good
make / manufacturer:
Spectrapure
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You just need to install a new membrane, new Spectrapure MPDI filter kits (set of three cartridges), and new capillary flow restrictor (green plug) into the 1/4" OD yellow tubing (waste line which goes directly into your bathtub drain). Per Spectrapure's manual, the first four gallons of freshly produced water should be discarded after changing the filter cartridges. The filter cartridges should be installed in the order as pictured - the MicroTec 1 Micron Sediment 10" is on the far left, Micron Carbon Block 10" (blue trim on top and bottom) in the middle and SilicaBuster DI Cartridge 10" on far right. The SilicaBuster should be the last filter that tap water passes through before it becomes RO water.
The membrane case (made of hard round PVC) was recently replaced as the prior case lasted ten years before developing a minor crack. This listing includes three sets of new Spectrapure MPDI filter kits ($150.00), three new Geekpure 100 GPD membranes (cost $45.00), new spare rubber O-rings for membranes and new capillary flow restrictors (green plug - $10.00 each) and original Spectrapure manual for reference. This unit came from Spectrapure's factory as a 90 GPD unit and I modified it into a 100 GPD due to difficulty in finding replacement 90 GPD membranes.
The "capillary flow restrictor" is a small piece of plastic (green) that is to be inserted into a 1/4 inch yellow tubing where the tubing is attached to the drain fitting on the membrane housing. A flow restrictor will create back pressure on the membrane and allow the membrane to produce purified water to be delivered to the storage tank. Flow restrictors are sized to match the flow with the size of the membrane. In selecting a flow restrictor, be certain you do not "under size" the restrictor as you will prematurely foul the membrane. If you "over size" the restrictor, you will be wasting water but not causing damage to the membrane.
You should change the membrane yearly since Chicagoland has hard water. In addition, the capillary flow restrictor should be changed at the same time.
$40.00 cash only.