Identify your Bayliss Autovent

Over the years we have made various models of Autovent. Use the images below to identify specific models.

Mk7
	The Mk7 range is our current range of autovents. Mk7 Autovents come in satin anodised finish or epoxy powder coated white, green or brown. The full Mk 7 range can be viewed in our Product Catalogue. Mk7 power tube length excluding piston: 7.38" / 18.75 cms. Mk7 Super power tube length excluding piston: 11" / 27.94 cms. Mk7 Super Amdega power tube length excluding piston: 9.5" / 24.13 cms. We provide a full range of servicing and spares for Mk7 Autovents.
XL
	The XL is one of our current models. It is a clip on unit which measures 11" in length and is supplied in a satin anodised finish only. The XL can be viewed in our Product Catalogue. XL power tube length excluding piston: 7.38" / 18.75 cms. We provide a full range of servicing and spares for XL Autovents.
Mk5
	This unit was manufactured during the late 1970s and 1980s, and can be coloured silver or green. It was made from anodised pressed aluminium. The original power tubes were either green or black and were threaded at the end so they would fit into tube tube collar. Mk5 power tube length excluding piston: 9" / 23 cms. Replacement tubes for this unit have been made from aluminium for the past 15 years and are available on the spares page.
Mk3 and Mk4
	This unit, made during the 1970s and early 1980s was made from cast aluminium and was coloured silver, green and sometimes orange. The original tubes were made from stainless steel and were approximately 9 inches/22.86 cm long. Tubes are still available for this unit from the spares page.
Mk1 and Mk2
	These were the first units we made and were designed to fit onto the side of the window. The unit had a sealed plastic body and the Mk I was fitted with a steel tube. The Mk II followed 2 years later with stainless steel tube. These units are now obsolete and unfortunately are not repairable/serviceable.