Dunno, since I've never worked on a Perflex. I'd recommend you call and ask Hayward:
Contact us by phone:
(908) 355-7995 (U.S.)
Mon-Fri, 8 AM – 5 PM
Contact us by letter:
Hayward Pool Products
Attn: Technical Services
One Hayward Industrial Drive
Clemmons, NC 27102
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