FAQs on Kent Products for Tapwater Filtration:
Reverse Osmosis, Deionized, Distilled Water Systems Installation,
Maintenance & Repair
Related FAQs: RO/DI &
Distilled Water 1, RO/DI & Distilled
Water 2, RO/DI & Distilled Water
3, RO/DI & Distilled Water 4,
RO/DI & Distilled Water 5, RO/DI & Distilled Water 6, RO/DI & Distilled Water 7, Rationale, Selection, For
Commercial/Large Output, RO Water
Storage, RO Water Treatment,
Deionizing Source Water Filtration,
Kati-Ani DI Units, Kold-Steril Units, Water Make-up, Nitrates,
Related Articles: Water
Purification Using Reverse Osmosis, Reverse
Osmosis, A Multipurpose Tool By Mark E. Evans,
Water Changes, Water Quality, Synthetic or Natural Seawater, Nitrates,
RO/DI unit not producing product water after filter change
I'm having an issue with my Kent Hi-s RO/DI unit. A few days ago I
changed the filters in the unit but since doing so it has not produced a
drop of product water. I tried(numerous times) re-seating the membrane.
The flow restrictor is still present and looks ok. I even tried putting
the old filters back in but that didn't work either.
<Mmm; something (a valve... likely white colored w/ a blue handle) is
turned off here.... take the entire unit out where you can look at it
(hopefully the tubing is long enough to allow this) and have a look/see
assure none of the shut offs are "at right angles">
I did notice that if I remove the filter from the 3rd canister I get a
pretty strong stream of water from the product line. With the filter in
the 3rd canister, the canister will fill with water but no product water
will come out..
<IF you find it hard to locate the occlusion... I encourage you to
(starting from the discharge end) to undo and reseat the compression
couplings of the tubing for the unit)
Can someone give me ideas on what to look at..The water level in my tank
is starting to get low :(
<Do write back if this isn't clear or doesn't solve the issue. Bob
Re: RO/DI unit not producing product water after filter change
Thanks for responding!
I took the thing apart today and looked for anything that could be a valve but
didn't see anything. And while putting it back together I reseated the
compression couplings. However that didn't seem to do anything and it is still
not producing any product water. I'm totally at a loss on this
<Mmm; dang... hard to describe the procedure here... w/o having the unit in
hand. IS there a fish store nearby you can take it into? Are you willing to ship
it to Kent for them to have a look/see? BobF>
Kent Maxima Hi-S RODI Unit, repair
I need help. I purchased a Kent Maxima Hi-S RODI unit from Craigslist.
I don't know how old the unit is but it looks like it can't be
more than a year or two old. When I bought it, it was new in the box.
Never been open. It was purchased from Marine Depot and given to the
seller as a present. The seller is moving from SF to Minnesota so
can't take it with him. Thus, this is why I have the unit.
The unit is a 60 GPD.
I connected the Hi-S membrane filter into the housing with the o-rings
down into the housing. The space from the top of the filter to the
housing is 1/2 exactly. I measured it with a tape measure.
When I connect the line to the outside hose (garden spigot) the water
moves quickly from the first canister to the second. Then the water
moves to the Hi-S filter. From there the water moves into the third
canister at the rate of 1 drop every 3 seconds. I ran the unit for 2
hours producing 9 gallons of waste water and 1/4cup of RODI water.
I then took all the hoses apart to make sure the lines were not plugged
up and blew through them with my mouth to make sure I could feel air. I
took the filter out of the Hi-S housing and reseated the filter to make
sure I had it in all the way. Then reconnected everything and
reattached the fitting to the garden spigot. Still the same
Can someone please help me. The third canister is only 1/2 full after 9
gallons of waste water and 2 hours running time. From a friend of mine,
he says I should get at least 2 gallons of RODI water out of 9 gallons
My unit does not have the pressure gage which tells me how much water
pressure my house puts out. Do I need one of these?
Or is there another way to tell how much water pressure you are getting
from the outside of your house?
<Most city water pressure will give you enough pressure for the
filter to function.>
Also, do I need to replace any of the filters. However, remember the
filters are new (never been used) and they were still in the
<No, they sound fine.>
I also am wondering can I take the unit someplace to have someone look
at it or can I send it to someone for service?
<Well, it is fairly straightforward. From your symptoms it sounds
like either the flow restrictor (goes into the waste line coming off
the membrane housing) is backwards/not there or there is a bypass on
the waste line for flushing the membrane that is on. It would simply be
a valve on the line, close it. For the flow restrictor, look here for
an idea of what I am talking about:
It just slides inside the waste line.>
Please let me know what I should do.
Stephanie (SF Bay area)
<Welcome, Scott V., Fresno, Ca.>