Tom from SWISCO responded:
August 26, 2013
Thanks for posting. Unfortunately, there is no way for us to determine what your sash weight is based on just the sash dimensions. We will have to know its weight.
I also cannot determine whether or not you have the Series 900 based on this image. They are hard to eyeball when just looking at the spiral. However, if you say the tube is 3/8" in diameter, then I think there's a good chance. I also agree that the second pair of nubs is likely hidden by the pivot shoe. |
Tom from SWISCO responded:
August 30, 2013
I'll answer your questions one at a time:
1) If you have a tilt window and the diameter of the tube is 3/8", then there is a good chance our Series 900 balance will work. However, we can't say anything more by only seeing the tip of the spiral. You will ultimately have to use your best judgement.
2) I'm not sure what tips will work for what as I do not know the length of the three balances. Knowing the sash sizes does not help with this. However, we have a chart under each Series 900 length that shows what kind of weight each tip color can support. Some of them do cross over, but as long as your weight falls within the range of one of the color choices, that color choice should work. Again, you will have to use your best judgement. 3) If your balances are making noise, then it may be time to replace them, yes. It wouldn't be a bad idea to charge them a little first, though, just to make sure. 4) Yes, we recommend silicone spray, as this does not attract any gunk. |