Especially over long periods of time, is air likely to get into a low-pressure system of properly glued PVC pipes and fitting either through joints or through valves sealing the system? In the case of valves, is air more likely to come through the valve (in the sense that if the valve is shut no air would get through, and if the valve was open air would get through) or is the air more likely to leak through where the handle enters the body of the valve?
10 years after the initial start up, this model chirps every 30 seconds to let you know it's time to replace the unit.
From what I understand, the alarms is how many different fire stations are called to fight the same fire. A 4 alarm fire means 4 departments had to come to fight it, so it was a very, large/uncontrollable fire.
These units are problematic. You probably should just replace it. At least you will have some peace of mind.
This is a HORRIBLE PROUCT. Do not buy it.
