main drain plumbing?

[Frank in FL]

Going through some on my build pics.

Whats with the 3 PVC pipes for the main drain?

 

[JamesW]

You should have more than the single main drain shown in the picture. The other main drains should tie in to the same supply line near the main drain shown in the picture. What other main drains do you have?

 

[Frank in FL]

You should have more than the single main drain shown in the picture. The other main drains should tie in to the same supply line near the main drain shown in the picture. What other main drains do you have?

Thats all I have. 1 main drain and a skimmer.
Let me find a different pic.

 

[Frank in FL]

here's another pic with concrete

 

[JamesW]

You might have a suction limiting vent system.

Do you have any vents around the perimeter of the pool?

I’m surprised that you have a single main drain.

That’s not something that anyone should do.

Main drains should always be two or “unblockable”, like a channel drain.

 

[Frank in FL]

Near my pump there’s a candy cane shaped pvc pipe that the PB told me was a over flow pipe. But christ, it’s about 18” above the pool water level. Not sure what it’s going to do.

What do you mean by “unblockable” drain?

 

[JamesW]

That’s probably a vent tied into the plumbing. That's mostly a Florida thing.

An unblockable drain is a drain that is certified as unblockable where a person’s body cannot or is unlikely to be able to block the entire drain at once.

VGBA Drains and Suctions - CMP

PREMIER SELECTION Our selection of pool drains and suctions is designed to make your choices simple. You don’t need a confusing array of styles– you need the right drain for the job. KEY FEATURES SEVEN YEAR LIFE Remember to check your drains. To comply with the ANSI/APSP - 16 2017 standard, all...

www.c-m-p.com

https://www.poolspanews.com/how-to/codes/on-site-solution_o

Question 9: What is an unblockable drain?

Answer: The Act defines an unblockable drain as a drain sump of "any size or shape that a human body cannot sufficiently block to create a suction entrapment issue." The ANSI/APSP-7 2006 standard defines unblockable as “of any size and shape such that a representation of the torso of the 99 percentile adult male cannot sufficiently block it to the extent that it creates a body suction entrapment hazard.” In other words, the outlet must be such that a torso 18” x 23” with corners having a 4-inch radius would not be able to sufficiently block the outlet. Thestandard also allows for channel drains with a minimum open area 3" wide X 31" long.

Question 12: What is a suction limiting vent system?

Answer: Suction-Limiting Vent System -- a pipe vented to the atmosphere that connects to the suction pipe between the pool and the pump. When a high vacuum event occurs, air from the vent pipe replaces the water in the suction pipe thereby breaking the suction. The vent opening is protected by a tamper resistant cover.

https://www.apsp.org/Portals/0/PDFs/VGB%20FAQ.pdf

 

[bthill]

That’s probably a vent tied into the plumbing. That's mostly a Florida thing.

An unblockable drain is a drain that is certified as unblockable where a person’s body cannot or is unlikely to be able to block the entire drain at once.

VGBA Drains and Suctions - CMP

PREMIER SELECTION Our selection of pool drains and suctions is designed to make your choices simple. You don’t need a confusing array of styles– you need the right drain for the job. KEY FEATURES SEVEN YEAR LIFE Remember to check your drains. To comply with the ANSI/APSP - 16 2017 standard, all...

www.c-m-p.com

https://www.poolspanews.com/how-to/codes/on-site-solution_o

I am just starting a pool build myself, and my main drain has the secondary drain as a wall mount. That pipe part way up the wall is similar to mine. It is a Paramount SDX anti-entrapment drain.