Determine Coil Weight for Coil Balance

Question

Hello! I have vinyl double hung Simonton windows from 2010. I believe the existing coil balance is labeled "407S" ?? It is difficulty to identify. Can you assist with which weight is necessary for coil balance to replace the part?

Bob · Accepted Answer

Thanks for posting. Is this the only coil spring that was attached to the shoe? If so, see the S170-407 7 pound spring. The closest match we have to the shoe is the 15-192.

However, note that our replacements were intended for Certainteed windows. We've found the 15-192 shoe has difficulty fitting a Simonton window. You may be able to get it to work by rubbing down the alignment nubs on the shoe's surface, but even then I can't promise it will work.

Because of these difficulties, we've devised an alternative solution: our 15-259 shoe should fit your window. The catch is you'll have to replace the coil balances entirely with the Series 159. The video below shows how to do this.