How to connect 1" PVC pipe to 1" push fitting
That's likely the wrong fitting for the job.  Shark bite style fittings typically are for pec, Cpvc and copper.  Below is the list for branded products.  


Copper pipe hard drawn Type K, L and M and annealed Type M not to exceed 3/8 nominal, complying with ASTM B88
PEX pipe complying with ASTM F 876 or CSA B137.5
CPVC pipe complying with ASTM D 2846 or CSA B137.6
PE-RT pipe complying with ASTM F 276