Failure of filter cartridges?

[Jimrahbe]

Clint,

I can't think of any reason to bypass the filter...

That said, why not just run with what you have in the backwash position?

If this were my pool, I'd take the top of the filter off and play with the MPV and see what routes water where. I suspect that recirculate and waste still works and running on backwash would route the water to the correct in and out ports.

Thanks,

Jim R.

 

[magiteck]

So now, a quick question about removing the multipart valve, but preserving the ability to bypass the filter ("recirculation", for maintenance) or bypass the filter and dump to waste.

Looks like I will need (3), Jandy diverter valves to do this (see diagram). Do I also need a check valve to prevent the supply from being run into the outlet of the filter? In that case, it should be plumbed between the filter outline and the diverter valve on the return line, right?

Thanks!

View attachment 399235

Maybe I'm missing something, but what's the purpose of the bottom two diverter valves in this scenario? With just the top valve, you could direct the supply water to either the filter, or to waste.

 

[clintmiller]

Clint,

I can't think of any reason to bypass the filter...

That said, why not just run with what you have in the backwash position?

If this were my pool, I'd take the top of the filter off and play with the MPV and see what routes water where. I suspect that recirculate and waste still works and running on backwash would route the water to the correct in and out ports.

Thanks,

Jim R.

Bypassing the filter is just a convenience if there's a maintenance need that takes it temporarily out of service.

Running the multipart valve on backwash would send the flow backwards thru the filter, but also dump it to waste. Recirc and waste should still work correctly- it's just the inlet/outlet on the filter that got switched.

Thanks for all of your help, Jim.

 

[clintmiller]

Maybe I'm missing something, but what's the purpose of the bottom two diverter valves in this scenario? With just the top valve, you could direct the supply water to either the filter, or to waste.

The bottom two diverter valves enable "recirculation" which allow water to bypass the filter but remain in the pool.

 

[mknauss]

Buy a submersible pump. Cheaper and simpler. You can pump to waste and use to circulate the pool in an emergency.

 

[Jimrahbe]

but also dump it to waste

Clint,

I kind of missed that problem...

In the 25 total years I have owned my pools, I have never had to by-pass the filter. It is your pool, and you should do what you want, but it sure seems like a lot of effort and expense for no real gain.

Thanks,

Jim R.

 

[Newdude]

+1. I used the waste line many many times to vacuum out heavy crud or lower the water a bit. I never once needed to recirculate. If something freak happened and the filter blew up I would just repipe it at that point, but it's really unlikely.

 

[Saturn94]

+1. I used the waste line many many times to vacuum out heavy crud or lower the water a bit. I never once needed to recirculate. If something freak happened and the filter blew up I would just repipe it at that point, but it's really unlikely.

I use Recirculate every spring at opening to get the water well mixed while I scoop out all the dead bugs, worms, and debris that managed it’s way under the cover throughout the winter.