Pool Sand Filter Problem..Water Out Of Backwash Pipe

by Josef

Just changed the sand in my filter. Everything looks ok. I did the backwash for a couple of min. then put the multi-port selector to filter and water was running out on the backwash pipe.

I don't think so that this is normal. The water level started to drop. Never lost any water from the pool before in the filtering mode.

Can you please help me to solve this problem?

Thanks for your question Josef

First I would ask you if you put the correct kind of sand in the filter. There are several types of pool sand and different size particles.

Next, be sure you didn't break any of the laterals when putting the new sand in the filter. If there's sand going back into the pool through the returns, you might have a broken lateral. You need to remove some or all of the sand, replace the lateral, then put the sand back into the filter.

Be sure you've used enough sand and you measure the amount of sand from the top of the filter to the top of the sand. Your owner's manual should have this information.

I would look at the Multi-Port Valve. When you put in a new setting, such as "BACKWASH" it should "click" in place. If it doesn't, the gaskets or O-rings probably need to be replaced.

It my experience, when you have water going back into the backwash hose or pipe, there's a leak or bad gasket and/or-O-ring.

For you water level dropping, I've answered this question here:


Above Ground Swimming Pool Losing Water..Running Sand Filter System..

Hope this helps and let me know how it turns out for you

Have a great Summer


Donation..My Pool Guy..

Click here to read or post comments

Return to Pool Sand Filter Maintenance.

Swimming Pool Sand Filter Problems..

by Tina Roberson
(Senatobia, MS)

I am not sure if I am exlaining this with the correct terms used for the parts:

I have a Hayward sand filter that is not getting primed to run. When on the filter setting it starts going, alot of bubbles, like alot of force is going into pool at the return and almost has a good prime but then shoots water out the waste line and loses prime.

The only setting that doesn't have water coming out the waste is on circulate. I can send a pic or video if needed....

Thanks for the question Tina

The return lines might blow bubbles the first couple minutes after turning on the pump. This is normal because the bubbles are trapped air in the lines. The air will be replaced by water

This is not harmful and can be minimized by opening the pressure relief valve on the pool's filter.

If the bubbles keep happening, or if the pump cannot prime, either the pump is defective, the impellar motor is bad or clogged up with debris, or there's a leak on the suction side of the system which is common.

The suction side of the system is everything between the drain/skimmer and the pump, including the pump basket. The big job is to find the leak.

Next, be sure the water level is between 1/3 - 1/2 up from the bottom of the skimmer. A low water level will cause the skimmer to draw in air which will cause bubbles in the pool water and no prime in the pump motor.

There's a simple way to see if the suction loss is at the skimmer or drain. When the pump is running, slowly close the skimmer valve. If the pump fills with water, then the suction problem is at the drain. Do the opposite with the drain valve to verify. Open the skimmer valve and close the drain valve.

Check the seal/O-ring around the pump lid. If it's broken or worn, replace it.

Check the air release valve on the filter. Many have a small O-ring on the end of the valve which can get worn down or broken when overtightened.

Check around the outside of the all the equipment and on the ground. Look for any spots that might have water, around the top of the filter, pipes, everywhere. Water will indicate a leak somewhere.

Pool Sand Filter Problems..How To For Troubleshooting & Maintenance

Swimming Pool Sand Filters..Pool Filter System..Backwash

If the pump motor runs dry for too long the seals might melt which will cause the impeller to burn up as well, which might be the cause of the loss of prime.

It would be great to see some pics. or a video. Other people have the same issue as you and your pics./video might help them.

Hope this helps and good luck


Click here to post comments

Return to Pool Sand Filter Maintenance.

Jacuzzi 190 Sand Filter Standpipe

by Cassie

I have a 190 Jacuzzi sand filter that was set up before my husband bought our house a few years ago. We noticed the standpipe is not long enough to stand on the bottom of the filter and still reach the diverter/valve piece.

The standpipe actually fell off last year and we didn't realize and we had major algae problems. We spoke with the pool store that the previous owner purchased it from and they said to just place the standpipe on top of enough sand so that it will connect with the diverter/valve piece.

I was curious if this is even the correct standpipe piece for this filter since it seems like a bad design. It seems like we would get much better filtration if the standpipe assembly was placed at the bottoms of the filter.

Do you know of any longer standpipes that fit the Jacuzzi 190 sand filter? If not do you have any suggestions on how we go about getting our current standpipe hooked up. We have been so frustrated with this pool.

Thank you for any help!

Thanks for the question Cassie

Honestly, when I had my pool route in Arizona Jacuzzi filters were my least favorite for this very reason. I don't think they're designed well as compared to Hayward filters. Some parts were out of stock or no longer available.

Concerning the pool store employee answer, which doesn't surprise me, you need to be sure the standpipe is securely in place. Sand will shift and move, not alot, but it does. It also settles and gets backwashed out. Little by little. That's the foundation upon which he wants you to place the standpipe.

I got my parts from Superior Pools. They're main website is http://www.superiorpoolproducts.com/.

Other good sites are:




I hope this has answered your question to your satisfaction.

To post a reply, or if you have a similar question, you can see your post on the Q&A page in the "Sand Filters" category.

Check back to this post for updates or answers.

If you feel your situation is more complex and want immediate assistance (within 24 hrs) you can make a donation of $29 per hour and I'll answer your questions by phone.

Have I helped you find a solution to your pool problems? Did this information help you? Please consider making a donation to help keep this site going. Thank you.

Hope this helps and have a great Summer.


Click here to post comments

Return to Pool Sand Filter Maintenance.

Side Mount Sand Filter Leaking

by Mel

Have a hayward side mount sand filter that is leaking from base of pump or stand portion. Can't determine where or why. Is there a value on bottom of this filter that could be cracked?

I've looked at diagrams and can't determine where the leak could be coming from unless filter cracked...

Help pool is turning green!

Thanks for the question Mel

For a side mount sand filter there are a few places you can check. First are the bulk heads on the side of the filter, the suction and return side. Many filters do have gasket and drain cap situated near the bottom of the filter. Some also have a smaller o-ring that fits inside the cap. This is a place where you may find the leak.

The only other place would be the multi-port valve. The first 2 options are the easiest to fix and should only cost about $7 - $10 for parts. Unless the tank is actually cracked these are the places to look for any leaks. If the tank is cracked then replacement is the best option.

If you feel your situation is more complex than this, I do phone consultations for a donation of your choice. It makes things go much faster and many people have found it extremely beneficial, saving them time and money in the long run. All your questions will be answered. I have nothing to sell you so you know I'm not bias.

Pool Consultation

Hope this helps and have a great Summer.


Click here to post comments

Return to Pool Sand Filter Maintenance.

eBooks Are Perfect Desktop & Mobile Device!!

swimming pool care, basic pool care, above ground pool maintenance, inground, salt water

Click Here To Learn How This eBook Can Save You TONS Of Time & Money


Click Here To Learn The Best Way To Clear Up Your Pool 


All Resources In One Convenient Package. Click HERE To Get Started.

Recent Articles

  1. How To Clear Up A Cloudy Pool eBook

    How To Clear Up A Cloudy Pool eBook

    Read More

  2. Pool Float & Sweep

    How do I keep the hose from my pool sweep and the floater from colliding? If I tie the float off where is the best place, and one last if the float is tied off.

    Read More

  3. The calcium hydochlorite will not dissolve in our pool

    The calcium hydochlorite will not dissolve in our pool. It is suspended in the water

    Read More