S152 coils for an 18 lbs. window

A home owner from Buffalo, NY says:
Need both coil balance springs for my window, ( S-152 )Cannot detect any numbers or letters on either one. The window weighs 18 Lbs. I assume the 9# coils will work? Thank you.
Profile picture of Casey
Casey from SWISCO responded:

Hello,

I agree that as long as your original coil springs are an exact match to the S152 and your sash weighs exactly 18-pounds, then one S152-9 on each side of the window would provide the correct amount of strength. Thanks for posting! 

How to Replace a Triple Coil Balance System
How to Replace a Triple Coil Balance System
VIDEO
WATCH >
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 4-7 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.