3/4 inch PEX A pipe through Cinder Block

[Aaronac8]

I need to pass 3/4 inch PEX A pipe through a cinder block foundation wall, is drilling a 1 1/8 inch hole sufficient? Do I need to use an insulator around the pipe as it goes through the cinder block to prevent damage to the pipe from friction or movement?

 

[CT-18]

I would sleeve it in pvc

 

[Twowaxhack]

I’d sleeve it with 1” pex and drill a 1.25” hole through the wall. The OD of 1” pex is 1 1/8”

 

[Aaronac8]

I’d sleeve it with 1” pex and drill a 1.25” hole through the wall. The OD of 1” pex is 1 1/8”

I like the idea of this, but the OD of 3/4 inch PEX A is at least 0.875 (possibly more with the compression ring) which would not fit in the 1 inch PEX A (ID of 0.875)