However, it doesn’t happen too much or isn’t that common, so you won’t have to worry about this causing any kind of leaking that often.īut if something else isn’t causing it, then I would say its corrosion that’s doing it. So, it’s important to figure out which one is causing the leaking problem.Ĭorrosion is another reason that can easily damage the bottom part of the pump and cause it to leak. Keep in mind that the foot valve is a bit different from the check valve. So, when it gets damaged, it can easily cause leaking issues from the bottom. The valve is responsible for controlling the water flowing through. When the motor shaft gets too hot, it slowly eats out on the shaft seal.Īnd at some point, you will face leaking issues on your pump bottom.Įven though this doesn’t happen that often, you will find that the foot valve on your Grundfos MQ3-45 valve is damaged. The reason for the seals to wear out or damage most of the time is an increase in temperature. The seals are placed on the motor shaft, so you have to check there to find whether the seals are okay or not. The shaft seal keeps the pump protected from any kind of water leaking through it. How the pump gets damaged isn’t easy to determine, so you just have to keep an eye out for it.Īnother popular reason for this pump to leak from the bottom is because of a damaged or worn-out shaft seal. When there is damage to the bottom part of your pump, it can easily start leaking from there. A lot of the time, the pump can get damaged from too much pressure or something hitting the outer part of the pump. One of the most common reasons for your Grundfos MQ3-45 to leak is any kind of external damage to the pump. Unless you know the reasons for this problem to happen, you can’t solve the problem. Knowing the reasons for this pump leaking from the bottom is important.
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