Need help identifying these plugs on the bottom - are these 1 way?

[ASPooltime]

Hey all,

I'm working on closing my pool for the first time and I have these plugs on the bottom of the pool that do not look like normal return lines. I tried finding them on Amazon to learn more but I can't find them. One plug is flush with its mount and the other is sticking out. I just ran compressed air through and I only saw bubbles coming from the one that's flush. Are these cleaners of some kind? Do they act like 1 way valves?

Thanks for the help!

 

[ASPooltime]

Looks like it might be a cleaning head from Caretaker?

Caretaker 99 Bayonet In-Floor Pool Cleaning Head (Bright White) | 3-9-508

Shop Caretaker 99 Pop Up Heads in Bright White (3-9-508). Shop in-floor cleaning supplies and get FREE shipping to the US on ePoolSupply today!

www.poolinfloor.com

 

[Bama Rambler]

Do you have an infloor cleaning system?

 

[Catanzaro]

Also, can you upload pictures of the equipment pad? If you have an in-floor cleaning system (appears so), there should be a canister somewhere. The canister top should be removed to have access to the area. You would be using "air lock" methods to clear the lines and trap air.

Below is some information on the Paramount System, but yours may be different.

Paramount System - Plugs, etc.	Safety cover and water levels
	How late do you close in New England? Was just wondering how late others close in the New England area. This is only my second closing with the new pool. At some point I might take over the closing myself, However where the pool is only 1 year old and has a In floor cleaning system I am having the PB do the closings for now. We... www.troublefreepool.com