Cap 1800 pump

[barber1575]

I am looking to buy a cap-1800 agua pump. I was wondering if this pump is going to be loud for a closed loop system??? Thanks

[Vitaly]

I have a Cap-1800 in my sump (inside the stand). Can hear little vibration when my door is open...but my stand is not too heavily built/insulated Otherwise it is not bad at all...in my opinion.