Be prepared for the sheets to get stuck!
Seems my Central Vac pipes are very coated on the inside, probably due to the high humidity in our area. I first used a shop back to suction out any debris, and a lot came out.  Then, when I put one sheet in the closest inlet to the motor, and it got stuck.  Using a Shop Vac would not suck it back out. I had to cut the central line pipe to get the sheet out, and when I did I also removed &#34;junk&#34; totaling about the volume of a grapefruit. I resealed the pipe and put more sheets in from the 1st outlet and eventually &#34;junk&#34; about the volume of several grapefruit was in my central vac canister (I had cleaned the canister 1st).  I ordered a T PVC pipe fitting so I can add a clean-out along the central line pipe.  I did not want to start on the next outlet until I had build-in easy clean-out point. I then bought a 25' flexible plumber fish, and ran it into each inlet, starting with the closest to the canister with the vacuum on; wow, a lot more came out into the canister. Then I ran these sheets thru a few times from each inlet. Bottom line, these sheets will help a lot, but I had too much build-up inside my pipes for them to work initially. Now I will use them every so often so I don't have to go thru this again.
Rating: 5 stars