48x40 double hung window springs. Mi

Hey there,

thanks for writing in! There is a good chance we can supply you with the replacement coil balance assembly needed for your repairs. Although, I will need to see a photo of the entire assembly removed from the window.

I'll need to see an unobstructed view of the shoe and you'll also need to remove the coils to look for any stamps/markings that will indicated the spring needed to complete the assembly.

Please let me know if you have any questions in the meantime.

Hello! Jasmine isn't here today but I'll do my best to assist you.

Right off the bat, I can tell you that your balance assembly is a discontinued and obsolete style. You're probably not going to have an easy time finding this anywhere, and nothing in our inventory is an exact match.

However, that said the design is very similar to a few modern components we have in stock. See our 15-180 shoe, Series 190 spring, 15-181 double spring support, and 15-182 bushing. I think these components put together would approximate your old assembly, but you're going to have to look over the information and dimensions we show for each product to verify. That should be your next step.

Let me know if you had any questions about these parts and I'd be happy to answer.

The S190-740 carries 7 pounds per spring, whereas the S190-540 carries 5 pounds per spring. If your sash is only 15 pounds, I'd suggest using the 4 pound S190-440 on each side. That will give you 16 pounds of total support, which should be perfectly sufficient.

Hi Rick,

Thanks for the kind feedback! I’m glad to hear the window is back in working condition. Please do not hesitate to reach out, we’ll be happy to assist with any future projects.

Have a great weekend!