Proper vacuuming and cartridge filter cleaning

Sharelick

Bronze Supporter
Jun 1, 2020
57
Sharon, Ma
So I have a ton of Crud in the deep end of my pool that I'm trying to get out, because the pool hasn't been opened in the 3 years since I bought the home, and the previous owner was neglectful before that. So I've read a thread that basically says I should try to scoop it out with my leaf net thingy (sorry cant remember the real name) and never use Floc especially because I have a cartridge filter and no way to bypass.

But before reading this, I balanced and SLAMed my pool. I've passed the OCLT multiple nights in a row without adding any chlorine for 3 days and I've been trying to sweep up the deep end debris into a smaller pile. Then asked the pool company to vacuum (which they claimed to have tried doing but said there was too much gunk and gave up after an hour, then offered no advise on what I should do. Overall, I'm not a fan of my installer and would warn people about this company but not sure if this is the right place to do that. Plus I'm still hopeful they may come through, since I'm an optimistic kind a guy, but I have little faith at this juncture. Anyway I digress.)
So I ended up vacuuming myself, only to find the returns shooting dirty water back into the pool. So I checked my gauge and there was an increase from about 9PSI to about 10.5 PSI (almost 20%). So I decided to take out my filter and give it a thorough rinse, even though the equipment dealer said to wait until I got to about 16PSI. Now its back to 9PSI.

I went to the Hayward website to see if they'd be any help. There it says the following: "When a cartridge filter is clean it is possible for algae to pass through the filter element. Cartridge filters filter smaller particles as the filter becomes dirty. The dirt or debris on the element’s surface helps to catch smaller particles. It may be necessary to add certain chemicals to the pool so smaller particles can be picked up by the filter element. Consult your Hayward dealer for the proper chemicals to accomplish this task. " Frequently Asked Questions | Support - Hayward Pool Products it goes on to discuss how to wash the filter as well. Click on the link if you're interested.

So am I getting dirty water shooting out the returns because my filter is too new and too clean? Should I ignore the advise from a few other threads to clean the filter when I go up 20-25% of starting PSI, and wait until there's an 8 PSI increase, like the manufacturer suggests? Would anyone else use their new cartridge filter to vacuum up this sludge, or do I need to hire someone with an external vacuum to clean up this mess?

So I still plan to scoop up the junk in the deep end with my net, before vacuuming again. But I'm a little concerned there could be some rocks down there that could tear my vinyl liner. Anyway, does the hayward FAQ seem right to everyone? Or what other advise would you give to cleaning up the deep end?
 
Shooting dirt out doesn't sound right. Sounds to me like something wasn't seated right when the filter was assembled or there's a tear somewhere. You don't want a bunch of unfiltered water running through the SWG.

If you have all the crud in a pile, you could try devising a way to vacuum to waste. Remove the filter drain plug and screw in a nipple or hose barb, something to direct the flood where you want it. Before you start, raise the water level in the pool,and set the vacuum head and hose in. When you're ready to go, feed the hose in slowly to fill it with water and displace any air, hook it up, flip the pump on and start vacuuming. Now that I think about it, maybe renting a trash pump and connecting that to the vacuum would be easier..

But I see two problems: huge amounts of crud and a filter that doesn't.
 
Thanks Richard, I really appreciate the comments and ideas.

For the first week I used this all new equipment and there was no dirt in the return line, plus a few hours after vacuuming it was clear again. Also, the water really seemed to clean up. So I think the filter is working to some degree. It seems maybe something wasn't seated right, like you said, which allowed the filter cartridge to be bypassed by the dirt coming in. Or somehow the filter was overwhelmed and that allowed it to be bypassed. I can't think of anything else.

Not sure if this helps, but I haven't turned the SWG on yet. So the dirty water definitely was run through it. I'm not sure how to remove or bypass the SWG, but it sounds like that would be a good idea for now, especially since its not like i'm using it.

In the meantime, I put everything back together, I believe correctly. So I could vacuum through it again to see if I get dirt in the returns a second time.

I don't think I'd try to configure the filter so I could vacuum and send the waste out from the drain plug. I think I'd rather get a diverter valve for about $35-55, then install that before the filter and run it to a waste hose away from my pad. If it was just water, I would not mind that idea, but who knows what is going to be dredged up from down there.

The trash pump from home depot rents for about $50 for 4 hours (they sell a semi-trash pump for $200 and online there's a diaphragm pump for $100 but dont know if those would work or what the difference is and $50 isn't too bad.) But if I dont use my filter, i won't know if I have a bigger problem. If I do use my filter, I may destroy the new cartridges and have to buy new ones for like $200.

I'm not sure if anyone knows how to figure out which of these would go with my filter.
Hayward 3-Way PVC Diverter Valve with Union Fittings - PSV3SMDGR $45 at SunPlay.com
Hayward 3-Way PVC Diverter Valve 2" x 2-1/2" - PSV3S2DGR $35 at Hayward 3-Way PVC Diverter Valve 2
Hayward Cartridge Elements CX591XREPAK4 $200 at SunPlay.com
 
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