"The kit itself is fine, but to go through a wall properly i found i needed the 125mm tube and a connector sleeve ring (both available from screwfix) The external vent will fit the 125mm tube nice and snugly (no need to bond to the pipe - the wall fixings are enough, in case you want to change the colour or vent) - glue on the sleeve ring to the other end of the tube indoors - the metal tube assembly then just slides onto the other side of the connecting ring just right.!
The erbauer 127mm core drill is perfect for the job if used with the plastic tube - the metal flexi-tube will not fit. Get a couple of large 120-140mm jubilee clips too to make the connections secure.."
"Ideal kit for my tumble drier, to create a permanent vent. Much better than the plastic hose that disintegrated, and a nice finish to the wall. The vent flaps open easily so not too much back pressure."
"I bought this and fitted it in under an hour, the kit is straight forward and easy to install. Please be aware although it is 125mm kit the hole you need to drill is 140mm to get coil through the wall. Screwfix or most DIY shops do not sell a 140mm core drill so that's an issue."
"This Kit is better than the usual flimsy plastic vent kits. It can be formed into a sharp bend if necessary. It holds its shape very well so making good round it is easy. I used a 150mmm core drill to make the hole in the wall and then made good round the tube. I trimmed the tube to length afterwards using a trimming knife, as there is no spring steel spiral that needs to be cut with snips or similar. The only downside is that like nearly all these kits is that the mounting holes for the louvre outside are very close to the edge of the hole that you create, so the making good needs to be very good in order to get a fix for the screws. Making the plate for the louvre just a bit bigger would make a big difference to the ease of fixing. The louvres however do work well and unlike many others seem un affected by wind, so you don't get that annoying rattling noise in your kitchen when the wind is in the wrong direction"
"The Exterior grille is excellent but note that the metal expanding trunking is approximately 133mm diameter measured EXTERNALLY! So this trunking will NOT fit in a standard 130mm diameter core drilled hole!!"