FloPlast Air Admittance Valve 32 x 40 x 50mm
Not for use with Saniflo !!
Beware - DO NOT use for Saniflo in the outlet pipe.
FloPlast tech support confirm these valves have inadequate positive pressure capability - they will (mine did!) blow liquid through the top of the valve - nice shower feature!
Saniflo recommend and have tested the MultiKwik/Hunter Plastics WW150 - can confirm it works fine.
Note the WW150 has the same "air tightness test pressure 10Kpa" spec as the FloPlast - so you'd think they were equally good, No! It's the max positive pressure that matters (not actually written on the box). Used with Saniflos an AAV must handle a min of 10PSI (69Kpa). WW150 is good to 15PSI apparently, and also has a replaceable valve mechanism.
Can't comment on non-Saniflo use.
16 May 2015
Quick easy solution
Ideal as it will fit to pipe sizes from 32mm to 50mm
Prevents siphoning of waste water from traps when more than one item connected to same run of waste pipe
12 Apr 2015
have fitted many of these and never had any problems or failures.
does its job on all three pipe sizes advertised.
11 Mar 2015
Flow Past Air Admittance Valve
Paid a fair price, and it does what it says on the tin.
6 Dec 2014