Help! Rust from SWG plus Polaris 280 inline filter screen

KATHouston

Member
Jul 13, 2023
7
Houston, Texas
Pool Size
16000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Greetings from Houston!

Hoping for help with a “minor rust” question. Specifically - reoccurring on the metal screen of the In-line filter for Polaris 280 Max Black cleaner.

I appreciated the education I received from TFP years ago, when we bought this house with a pretty pool 10+ years ago. After firing a multitude of pool guys and gals and ditching the pucks, I became a liquid chlorine girl and while physical maintenance was rugged due to an oak overhead and a host of pigeons living within it... (enough said!), I managed to stop the cycle of green bouncing and had clear water with the help of TFP and my big kit.

We demo’d the house and built new (took FOUR years - adding grey hairs and stories to tell). And because everything in the pool was OLD and wrong sized, and we had to empty and punch weep holes in bottom anyway, we renovated the pool afterwards.

I am NOT a fan of the WetEdge surface we used. Still cannot discern if we had a bad install or if is just the nature of the product.

Meanwhile: We installed a new DE filter (previously had a massive sand), a new Polaris 280, dropped our heater and filled in the spa to be a shallow sun perch. I originally was using chlorine - but after much research decided to install a SWG.

Bags of salt are SO much easier to deal with (and less often needing to be hauled) than my boxes of liquid chlorine from the pool store!!!!

Aside from a black algae issue last summer (because we let the boys use the neighbors’ gifted to us from their lakehouse yellow kayak in our pool - a joyful, if less than pool-smart decision) and signs of its return now, which I have tackled myself, we have had no issues.

Except for mysterious rust colored stains on my poolbaskets, pump basket, and pool walls near jets.

2 months ago - I discovered that the in-line filter screen for the Polaris was rusting. I popped it out, replaced it. Today I see that it is rusting again.

I bought the replacement filters from Leslie’s and they are in Polaris marked bags, so appear to be genuine.

Do any of you have recommendations or ideas for combatting this? I am trying to track down a brand new inline filter housing, to replace the whole thing. We are not vain, I do not care about the current rust staining, it will fade am sure - I do want to stop the rust cycle and not be damaging anything in the system.

If this message is not too wordy and my photo file is not too large, will attempt to upload a snapshot.

Thank You!
 

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Also, I do not think is wise to simply discard the filter. We no longer have an oak in the backyard, but neighbors to the left have two massive crepe myrtles that poetically drop a ton of biological matter and neighbors in back have several Chinaberry trees which rain their leaves, blooms, branches, and mess throughout the year. I check that inline filter screen because on rare occasion it gets filled with gunk. Seems helpful to keep it?
 
Dear James,

Thank you! I had no idea that piece was two parts! Will take it apart this morning and check the spring for rust.

Will also update my signature and if needed, post a photo of my system.
 
I had a replacement on hand. Stopped husband on his way out the door to use brute force to open the valve, as had never been turned.

The spring appeared to be the same color as the one in your handy photo, not a silver, but not apparently “rusty” either?

The new spring, however, is a grey/silver color. I went ahead and installed the new pressure relief part. (Am updating parts on Polaris as summer rolls on). I will know to check it for rust every so often.
 

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Meanwhile, my quest for rust source continues. Attaching a photo of our system. You might notice in photo above that our black Polaris parts looked fairly well grey. Last summer, battling the black algae, I scrubbed and SLAMmed for a couple of grueling weeks before hiring a company to come eradicate it. When it was done, I had the guy clean the DE filter. And later come back to install new grids.

At some point, I had noticed that there were many of the little metal prongs from the pool brish he was using - in my polaris bag, on the floor of the pool, etc.

Is there a chance that there are still some of those metal bits hanging out in our filter and possibly rusting? Should I open it up and clean it myself??

I have yet to meet a pool technician that I feel is trustworthy or a keeper. (I feel like I could write a book of short stories or a graphic novel, comic book style - of all the characters have encountered in this field!). Which is why I appreciate TFP and learning to do so much myself. Training the family to assist.

But have always been afraid of The Filter. Whether was our old sand filter or our lovely new DE model. Seems beyond my skillset. Should I get over that and make opening the filter and inspecting and cleaning a project for husband I to tackle this weekend?

Or call yet another new “expert”?
 

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If you look at the stainless steel wire mesh, you can see that it is not rusty at all, however, there might be a metal band in the part that might be rusting.

Use a strong magnet to see if it is attracted to the stainless steel mesh and then see if the magnet is attracted to the top part where the rust is.

1691074362492.png
 

There is iron in the water in the Houston area. So that may be where the iron staining is coming from.
There is iron (and more) but this pool has been here for about 15 years. We renovated with a new surface and equipment about 5 years ago, then just swapped to saltwater a little over a year ago. The staining did not happen until after the swg. So am thinking is something specific!
 
Check the hose bib/spigot with a strong magnet to see if it is brass or maybe some type of steel.

Maybe pull the cell and check for rust at the inlet and the outlet.

View attachment 519373
Thank you! Is funny, after I posted the photo, I was looking at that same spigot with suspicion. Will check both of these suggestions.

Thank you for your time and thought!
 
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FYI == off topic == the SWCG is plumbed incorrectly. If installed vertically, water flow should be up through the flow switch and cell. Your water flow is down. If the SWCG flow switch fails, it can inadvertently leave your SWCG powered ON without water flow. That can result in an explosion. Not likely, but has happened. IF the SWCG is being controlled by an automation system and is properly wired to it, the likelihood is less as the automation should be removing power from the SWCG when the pump is not running.
 
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