Blowing lines no main drain

[Cassiecassie]

Hello!
inground vinyl liner, 20,000 gal.
2 jets 1 skimmer.
hayward sand filter.

i am closing the pool myself this year, i have read and read about blowing lines out, plugs, air bubbles, however i am getting tripped up on how to blow out the “main line”. How do i know what our main line is??

last year the pool closers disconnected the white plumbing pipes going to the filter. I am not sure why, maybe to just let the water drain out?

I do not see an area on the filter that you connect the air compressor to?

i have attached two pictures

can someone tell me how to drain the main lines out without a main drain? Where do i connect the air compressor to in order to drain main drain?

thanks.

 

[CTFocusST]

Tha main lines are the suction and pressure side piping pulling water and returning water to pool. Have you seen the post below? He has a lot of very useful pictures and other information in there including some options of where to connect compressor/shop vac.

The concept of closing an in ground swimming pool

I wanted to place a generic post that people can refer to when closing an IG Pool with a sand filter. The information in this thread is based on my experience, how I prefer to close a pool, and extremely valuable information from some of the many talented forum members. Most of the credit...

www.troublefreepool.com

 

[Cassiecassie]

Tha main lines are the suction and pressure side piping pulling water and returning water to pool. Have you seen the post below? He has a lot of very useful pictures and other information in there including some options of where to connect compressor/shop vac.

The concept of closing an in ground swimming pool

I wanted to place a generic post that people can refer to when closing an IG Pool with a sand filter. The information in this thread is based on my experience, how I prefer to close a pool, and extremely valuable information from some of the many talented forum members. Most of the credit...

www.troublefreepool.com

Oh great, thank you! I haven’t seen this thread! Taking a look now!