Hi all,
I recently swapped out my Iwaki MD-100RLT with a brand new, identical unit, only to find that the replacement is comparatively noisy! Its predecessor was virtually silent. Closer inspection reveals that the pump isn't producing noise per se, but is generating a strong vibration which, in turn, travels through 12" of PVC pipe, valve and connector to the sump which acts as, well, a subwoofer. Furthermore, the sump and outflow pipes touch walls and you can hear the hum from almost every room in our two-story house. Our setup provides a natural back-flow of water into the pump, so there's almost no chance of damaging the pump by running it dry. Nonetheless, I've stopped/restarted several times in order to flush out any air that might be trapped in there. No luck.
Unfortunately, I purchased this $350 pump in May of 2008 as a backup. It sat on the shelf until yesterday. I don't know that I'll be able to get a replacement at this late date if it's determined to be defective. I need to fix it.
Any ideas?
I recently swapped out my Iwaki MD-100RLT with a brand new, identical unit, only to find that the replacement is comparatively noisy! Its predecessor was virtually silent. Closer inspection reveals that the pump isn't producing noise per se, but is generating a strong vibration which, in turn, travels through 12" of PVC pipe, valve and connector to the sump which acts as, well, a subwoofer. Furthermore, the sump and outflow pipes touch walls and you can hear the hum from almost every room in our two-story house. Our setup provides a natural back-flow of water into the pump, so there's almost no chance of damaging the pump by running it dry. Nonetheless, I've stopped/restarted several times in order to flush out any air that might be trapped in there. No luck.
Unfortunately, I purchased this $350 pump in May of 2008 as a backup. It sat on the shelf until yesterday. I don't know that I'll be able to get a replacement at this late date if it's determined to be defective. I need to fix it.
Any ideas?
