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HI All;<div><br></div><div>I just wanted to see if anyone has had any problems with the Grundfos MQ pressure pump. We've been using them for a while with great results, but recently ate 2 in about 3 months on one site. The first expired due to cavitation from a suction side air leak. (Not our work) The replacement only lasted 6 weeks, the rotor just blew apart, either a bad unit, or something in the line jammed it. There was a filter inline just before the inlet. Grundfos honored the warranty the first time, but is not covering the damaged impeller. </div><div>Anyone else have trouble with these recently?</div><div><br></div><div>Thanks in advance as always,<br><br><div> <span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div>R. Walters</div><div>Solarray.com<span class="Apple-tab-span" style="white-space:pre"></span></div><div>NABCEP # 04170442<span class="Apple-tab-span" style="white-space:pre"><span class="Apple-style-span" style="white-space: pre; "> </span></span></div><div><br class="khtml-block-placeholder"></div><br class="Apple-interchange-newline"></span> </div><br></div></body></html>