Using wheeled vacuum heads on vinyl liner - Why Not ?

[clearh2o]

Hi everybody,
I am a 17 year veteran of DIY pool maintenance and repair of my IG vinyl pool. I wanted to post a quick question regarding using wheeled vacuum heads on vinyl liner pools. I am interested in the Pro Vac 214 flexible unit with rotating handle and ball bearing, polyurethane wheels. I can't seem to find any specific info on why it's such a bad idea. I got to try one out last summer, and it was AWESOME.....any comments or info ?
Thanks,
Mike

 

[JohnT]

The brushes on a vinyl liner vacuum keep the opening in the vac from contacting the liner which could damage the liner.

 

[woodyp]

Both vac heads I use in my AG vinyl pool have plastic wheels. One on my pool blaster max and the other "normal" head for my 40 foot long skimmer vac hose. No issues for 5 years now. Both of these heads have brushes as JohnT mentioned as well. I don't see how the head you're looking at could "suck itself down" and contact the liner myself.