Installing new standpipe and multiport valve sand filter

[KFPOOL5]

I spent about 2 weeks slamming my pool. It turned it from dark dark green to blue. Although it was blue it was very cloudy the whole time.
I ended up switching out a new multiport valve because it was leaking to waste when running and the pressure gauge was broken.
(Yes, I know I could have replaced the spider gasket but it was glued in and I was trying to have a clean pool by the 4th and didn’t have time to deal with it.)
When we opened our Hayward sand filter we noticed the pvc on the standpipe was broken all the way down (even the lateral housing was cracked.) Explains the sand getting in the pool and cloudy water.

I’m getting a new standpipe delivered today. I saved my old sand in 5 gallon buckets, it was very clean) and bought an extra bag just in case. I read on here to fill with water before adding sand back.
How much water should I add?
How much sand should I add? There’s no label on the side of the old filter so I don’t know the model.
Should sand be filled typically 1/2 way? 3/4 way?
Do I add more water afterwards to help the priming process or just let the pump fill up the filter?
Do you backwash and rinse first once it’s all set back up?
Any tips on putting it all back together would be greatly appreciated. Hoping it clears up quickly!

FYI it’s a 26,000 gallon inground pool. I’m not sure about the size of the filter. I’m guessing 400 or 500 lb sand filter.

Thank you!

 

[Texas Splash]

How much water should I add?

About 6-8 inches should be adequate. You want to cover the later by a couple inches to cushion the laterals from the weight of the sand as you dump it it.

How much sand should I add? There’s no label on the side of the old filter so I don’t know the model.
Should sand be filled typically 1/2 way? 3/4 way?

About 2/3 full.

Do I add more water afterwards to help the priming process or just let the pump fill up the filter?

No need. Once you have the filter filled with the sand, close it up.

Do you backwash and rinse first once it’s all set back up?

Do a thorough backwash followed by rinse to get any light dust and junk out of the new sand.

Any tips on putting it all back together would be greatly appreciated. Hoping it clears up quickly!

Be careful to not get any sand in the center pipe when adding it. Have some pool silicone handy for the MPV clamp O-ring at teh top. Take your time. Nothing worse than finding out later something was wrong and you have to repeat the entire process.

 

[1poolman1]

I spent about 2 weeks slamming my pool. It turned it from dark dark green to blue. Although it was blue it was very cloudy the whole time.
I ended up switching out a new multiport valve because it was leaking to waste when running and the pressure gauge was broken.
(Yes, I know I could have replaced the spider gasket but it was glued in and I was trying to have a clean pool by the 4th and didn’t have time to deal with it.)
When we opened our Hayward sand filter we noticed the pvc on the standpipe was broken all the way down (even the lateral housing was cracked.) Explains the sand getting in the pool and cloudy water.

I’m getting a new standpipe delivered today. I saved my old sand in 5 gallon buckets, it was very clean) and bought an extra bag just in case. I read on here to fill with water before adding sand back.
How much water should I add?
How much sand should I add? There’s no label on the side of the old filter so I don’t know the model.
Should sand be filled typically 1/2 way? 3/4 way?
Do I add more water afterwards to help the priming process or just let the pump fill up the filter?
Do you backwash and rinse first once it’s all set back up?
Any tips on putting it all back together would be greatly appreciated. Hoping it clears up quickly!

FYI it’s a 26,000 gallon inground pool. I’m not sure about the size of the filter. I’m guessing 400 or 500 lb sand filter.

Thank you!

What is the diameter of the tank? That will give an indication of the model and amount of sand needed.

 

[KFPOOL5]

About 6-8 inches should be adequate. You want to cover the later by a couple inches to cushion the laterals from the weight of the sand as you dump it it.


About 2/3 full.


No need. Once you have the filter filled with the sand, close it up.


Do a thorough backwash followed by rinse to get any light dust and junk out of the new sand.


Be careful to not get any sand in the center pipe when adding it. Have some pool silicone handy for the MPV clamp O-ring at teh top. Take your time. Nothing worse than finding out later something was wrong and you have to repeat the entire process.

Thank you for the help! Standpipe never came today, hopefully tomorrow! I’ll let everyone know how it goes or if I have any questions!

 

[KFPOOL5]

What is the diameter of the tank? That will give an indication of the model and amount of sand needed.

Thank you for the reply! Old sand is in buckets anyways so I don’t know the accurate weight of the “old” sand. (It was only used for like 4 months). But someone else said to fill it 2/3 of the way up.

 

[Texas Splash]

Thank you for the reply! Old sand is in buckets anyways so I don’t know the accurate weight of the “old” sand. (It was only used for like 4 months). But someone else said to fill it 2/3 of the way up.

If you get a chance to wrap a tape measure around that filter to get the diameter, it can help pinpoint a more accurate sand requirement other than just using the 2/3 full rule. You could also post a pic or two of the filter which can be helpful in determining the make/model.

 

[KFPOOL5]

If you get a chance to wrap a tape measure around that filter to get the diameter, it can help pinpoint a more accurate sand requirement other than just using the 2/3 full rule. You could also post a pic or two of the filter which can be helpful in determining the make/model.

Ok, thanks! Will do!