Hairline crack inside leaf vacuum canister

Repair the crack with...

 
See if the crack repair holds or it cracks again.

My question would be why did it crack? Did the canister and the pipe below the crack shift so there is pressure on that area causing the crack?

If the crack does not come back you will be good. If it comes back then replace it which will fix any pressure from the pipe.
 
You can attempt the repair of the existing canister.
Be sure you leave enough clearance to remove the basket easily.

A new A&A Leaf Vac costs about $300

$1000 to install is highway robbery.
It's probably a 3 hour job at most.

Maybe call around to other pool repair people or check the dost to replace with the local pool guys in your neighborhood.
 
You may want to ask around then.

Where in AZ are you located?
What is the monthly cost for your pool guy?
How are you chlorinating your pool?

Have you given any thought to doing your own pool maintenance? It's really pretty easy and takes very little time. And no one will care for your pool as much as you will. We will be here to help you get it dialed in.
Pool Care Basics

Fill out your signature with pool, pool equipment (including manufacturers and model numbers) and test kit info.
This assists us in providing help without needing to ask about your pool each time.
See my signature as an example of what to include.
 

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