Just Bob Posted June 24, 2016 Report Share Posted June 24, 2016 I finally got around to plumbing my DD into my central vacuum system this morning. I am very pleased, it works as advertised, which is a good thing since I was going through an 8 gallon bag and filter every 2 weeks. What surprised me was the amount of air flow loss (suction?). I used my anemometer and found that there was a 22% drop in airflow at the DD intake. My system is ducted, and I checked at the longest run, around 34' of duct, and the loss was 24%. So almost all of the loss occurs at the DD. The long run is for my drum and oscillating sanders, and I am not sure how it is going to affect the dc of those machines, guess I will find out. No matter what I am glad that I finally found the "round tuit" and got it done. I am curious though, if anyone has found that the suction loss has caused any problems. Quote Link to comment Share on other sites More sharing options...
drzaius Posted June 24, 2016 Report Share Posted June 24, 2016 I use a DD/shop vac with my sanders. I found that without the DD the suction was better for about the first 5 minutes of use, then falling off dramatically as the filter plugged. Now I'll go for hours of use without needing to clean the filter. Quote Link to comment Share on other sites More sharing options...
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