“Seems well made and sturdy and easy to install.The only thing I'm not sure about is the plastic back plate that fits on the wall has no seal and water could get behind the back plate and enter the airbrick.I have wrote to Build and Plumb about this but haven't received a reply or exclamation from them.The seal within the framework itself is good but if the water gets in between the brickwork and the outer frame it will be behind the seals and therefore defeat the object.Hoping for an answer soon from the firm.”
