First Jandy DEV60 Backwash

[Tungsten51]

OK, my psi is around 30 so I'm thinking I should backwash (I've been quickly forced into pool service). Can anyone tell or guide me on how to do this? I have the pull side valve. It seems daunting. Is it?

 

[Jimrahbe]

51,

Where does the backwash line go?

Do you have new DE to add once you have backwashed?

I see you have the useless SVRS option on your pump.. Don't be surprised if the pump shuts off, as almost any surge will shut that pump off.

If you are ready, it is as simple as moving the push/pull backwash valve to the backwash position and turning on the pump for couple of minutes.

Keep an eye on your water level and make sure you don't let it drop below the skimmer's mouth.

Thanks,

Jim R.

 

[Tungsten51]

See attached. Is this a dedicated flush line to "somewhere"? And no I don't have the DE yet.

 

[Jimrahbe]

51,

In the DFW area most newer pools have their filters plumbed to the house sewer because of city codes.

Since it goes "somewhere" I would assume it is the sewer, On older pools you will often just see an open pipe or a flexible hose.

After you are done backwashing you will need to immediately add new DE to the skimmer so that it recoats the grids inside the filter. The DE is what actually captures the debris and dirt.

You need to add 80% of what the filter says to use when new (empty).. You can only backwash so many time before you need to open the filter and manually clean it. I recommend you do a full clean once a year.

Take the 80% DE and add it to a 5 gallon bucket. Then add water to almost fill the bucket. You will be amazed at how much water can still fit in the bucket even when full of DE. Stir it up and with the backwash valve back in the filter position, slowly pour the DE slurry into the skimmer. Obviously with the pump running.

At this point you should note your "clean" filter pressure.

30 lbs. sounds awful high since you have a VS pump. You must be running the pump almost full speed, which no sense.

I don't ever backwash any more. I just open the filter and clean it about every six months.

Thanks,

Jim R.

 

[Tungsten51]

51,

In the DFW area most newer pools have their filters plumbed to the house sewer because of city codes.

Since it goes "somewhere" I would assume it is the sewer, On older pools you will often just see an open pipe or a flexible hose.

After you are done backwashing you will need to immediately add new DE to the skimmer so that it recoats the grids inside the filter. The DE is what actually captures the debris and dirt.

You need to add 80% of what the filter says to use when new (empty).. You can only backwash so many time before you need to open the filter and manually clean it. I recommend you do a full clean once a year.

Take the 80% DE and add it to a 5 gallon bucket. Then add water to almost fill the bucket. You will be amazed at how much water can still fit in the bucket even when full of DE. Stir it up and with the backwash valve back in the filter position, slowly pour the DE slurry into the skimmer. Obviously with the pump running.

At this point you should note your "clean" filter pressure.

30 lbs. sounds awful high since you have a VS pump. You must be running the pump almost full speed, which no sense.

I don't ever backwash any more. I just open the filter and clean it about every six months.

Thanks,

Jim R.

OK, thanks. I kind of figured that line was going to some type of sewer or drain, not very articulate I know, and my old service company cleaned the filters recently.

So the next thing I need to figure out is what speed my pump is running at right? It's running 12 hrs now.

 

[Tungsten51]

51,

In the DFW area most newer pools have their filters plumbed to the house sewer because of city codes.

Since it goes "somewhere" I would assume it is the sewer, On older pools you will often just see an open pipe or a flexible hose.

After you are done backwashing you will need to immediately add new DE to the skimmer so that it recoats the grids inside the filter. The DE is what actually captures the debris and dirt.

You need to add 80% of what the filter says to use when new (empty).. You can only backwash so many time before you need to open the filter and manually clean it. I recommend you do a full clean once a year.

Take the 80% DE and add it to a 5 gallon bucket. Then add water to almost fill the bucket. You will be amazed at how much water can still fit in the bucket even when full of DE. Stir it up and with the backwash valve back in the filter position, slowly pour the DE slurry into the skimmer. Obviously with the pump running.

At this point you should note your "clean" filter pressure.

30 lbs. sounds awful high since you have a VS pump. You must be running the pump almost full speed, which no sense.

I don't ever backwash any more. I just open the filter and clean it about every six months.

Thanks,

Jim R.

Jim, and what's interesting to me is that (see picture) at the bottom of the filter there is DE remanent. Why is this? Go easy, I'm still learning. Haha

 

[Tungsten51]

Jim, and what's interesting to me is that (see picture) at the bottom of the filter there is DE remanent. Why is this? Go easy, I'm still learning. Haha

Ok, I’ve learned what this drain port is for. Pardon my ignorance. Onward....

 

[Jimrahbe]

51,

If you "clean" the filter, you need to drain it..

If you "backwash" the filter, you do not drain it.

For normal filtering I would think you should be running at 1500 to 2000 RPM..

You can run your pool at whatever speed you want.. but, the whole idea of having a VS pump is to run it as slow as you can and still get the job done.

Thanks,

Jim R.

 

[Tungsten51]

51,

If you "clean" the filter, you need to drain it..

If you "backwash" the filter, you do not drain it.

For normal filtering I would think you should be running at 1500 to 2000 RPM..

You can run your pool at whatever speed you want.. but, the whole idea of having a VS pump is to run it as slow as you can and still get the job done.

Thanks,

Jim R.

OK, I did my first backwash. Turned off equipment, turned to open the valve, flushed it twice for about a minute each. Locked the handle then pushed down. Then turned filter back on and added DE.

-The psi only dropped to 24
-the backwash pipe didn't clear of water (see picture)
-and now the spa looks dirty.

What did I do wrong?

 

[Tungsten51]

51,

If you "clean" the filter, you need to drain it..

If you "backwash" the filter, you do not drain it.

For normal filtering I would think you should be running at 1500 to 2000 RPM..

You can run your pool at whatever speed you want.. but, the whole idea of having a VS pump is to run it as slow as you can and still get the job done.

Thanks,

Jim R.

And it looks like the pump is running at 3,050 rpm, 1862 watts.

 

[Tungsten51]

And it looks like the pump is running at 3,050 rpm, 1862 watts.

The spa is clear now....

 

[Jimrahbe]

51,

Filter pressure is 24 lbs. because you are running your pump at almost full speed. This won't hurt anything but just a waste of money for electricity..

You should try to set you pump to run at say, 1800 and see if that works for you.

I don't know much about your Jandy Automation system, but you should be able to adjust what speed your pump runs from the automation.

Thanks,

Jim R.

 

[Tungsten51]

51,

Filter pressure is 24 lbs. because you are running your pump at almost full speed. This won't hurt anything but just a waste of money for electricity..

You should try to set you pump to run at say, 1800 and see if that works for you.

I don't know much about your Jandy Automation system, but you should be able to adjust what speed your pump runs from the automation.

Thanks,

Jim R.

Ok, I will figure it out, thanks.

 

[Tungsten51]

51,

Filter pressure is 24 lbs. because you are running your pump at almost full speed. This won't hurt anything but just a waste of money for electricity..

You should try to set you pump to run at say, 1800 and see if that works for you.

I don't know much about your Jandy Automation system, but you should be able to adjust what speed your pump runs from the automation.

Thanks,

Jim R.

I changed pump speed to 2,300 and psi now 16. Thanks for the heads up.