WMAS Discussion Forum : "Knocking" MP40's http://www.utahreefs.com/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sun, 05 Jul 2026 07:04:39 +0000 Sat, 30 Nov 2013 19:48:23 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.03 360 www.utahreefs.com/forum/RSS_post_feed.asp?TID=68050 <![CDATA[WMAS Discussion Forum]]> http://www.utahreefs.com/forum/1by1.gif http://www.utahreefs.com/forum/ <![CDATA["Knocking" MP40's : Every time you bump them or take...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545539&title=knocking-mp40s#545539 Author: Ryanscott
Subject: 68050
Posted: November 30 2013 at 7:48pm

Every time you bump them or take them off they will rattle again and you'll have to adjust them. They get better th longer you have them. I can take mine out to clean and put them back in without adjusting them and they don't rattle they almost self adjust anymore.]]> Sat, 30 Nov 2013 19:48:23 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545539&title=knocking-mp40s#545539 <![CDATA["Knocking" MP40's : Well after messing with it for...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545538&title=knocking-mp40s#545538 Author: Jeepkid
Subject: 68050
Posted: November 30 2013 at 7:28pm

Well after messing with it for a while I must have found the sweet spot. its nice and quiet again and i can turn it up all the way with no rattle.]]> Sat, 30 Nov 2013 19:28:50 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545538&title=knocking-mp40s#545538 <![CDATA["Knocking" MP40's : Way back in the day, I ran a WP40...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545502&title=knocking-mp40s#545502 Author: DLindquist
Subject: 68050
Posted: November 30 2013 at 9:37am

Way back in the day, I ran a WP40 on my 90G. The wet side would knock and then actually disengage itself completely. I messed around with it for a couple of weeks before calling Ecotech. I was told the wet side bushing was bad. Ecotech actually ended up sending out a whole new wet side at no cost. About two years ago we upgraded to a 270G and two MP60's. Aside from scrubbing down the wet side every three months or so, I have had no problems. ]]> Sat, 30 Nov 2013 09:37:38 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545502&title=knocking-mp40s#545502 <![CDATA["Knocking" MP40's : Ill try n see if any of the above...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545495&title=knocking-mp40s#545495 Author: Jeepkid
Subject: 68050
Posted: November 30 2013 at 8:16am

Ill try n see if any of the above things work. Reefdup, when my first pump started knocking it had only been.about 3 months after I bought it but I will take it apart and see if I cant find the problem. Thank you guys. Ill follow up with what I find]]> Sat, 30 Nov 2013 08:16:43 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545495&title=knocking-mp40s#545495 <![CDATA["Knocking" MP40's : The wet sides require maintenance...usually...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545490&title=knocking-mp40s#545490 Author: ReefdUp
Subject: 68050
Posted: November 30 2013 at 7:22am

The wet sides require maintenance...usually about after a year or so they'll start knocking. You can pick up repair kits for about $20 (although some people just buy fully new wet sides.)

I wrote up how to change the wet side if you're interested. It's not hard.

http://www.reefdup.com/2012/07/29/diy-vortech-mp-40-wet-side-maintenance/]]> Sat, 30 Nov 2013 07:22:22 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545490&title=knocking-mp40s#545490 <![CDATA["Knocking" MP40's : look on the wetside for a non-uniform...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545487&title=knocking-mp40s#545487 Author: phys
Subject: 68050
Posted: November 30 2013 at 2:25am

look on the wetside for a non-uniform flatness. Sometimes it can warp. Also be sure its aligned well and doesn't shift after you center the two sides. ]]> Sat, 30 Nov 2013 02:25:23 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545487&title=knocking-mp40s#545487 <![CDATA["Knocking" MP40's : Jeepkid wrote:Ill give it another...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545483&title=knocking-mp40s#545483 Author: love2skiutah
Subject: 68050
Posted: November 30 2013 at 12:30am

Originally posted by Jeepkid Jeepkid wrote:

Ill give it another go but I have had no luck trying to adjust them so far. I cant go past like half volume because the knock gets ridiculous.

Try swapping the cages. 
]]> Sat, 30 Nov 2013 00:30:32 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545483&title=knocking-mp40s#545483 <![CDATA["Knocking" MP40's : Ill give it another go but I have...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545482&title=knocking-mp40s#545482 Author: Jeepkid
Subject: 68050
Posted: November 30 2013 at 12:21am

Ill give it another go but I have had no luck trying to adjust them so far. I cant go past like half volume because the knock gets ridiculous.]]> Sat, 30 Nov 2013 00:21:27 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545482&title=knocking-mp40s#545482 <![CDATA["Knocking" MP40's : When you mount the dry side with...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545481&title=knocking-mp40s#545481 Author: love2skiutah
Subject: 68050
Posted: November 30 2013 at 12:19am

When you mount the dry side with the sticky tape, over time it can slide and not stick as well. I didn't notice the dry side sliding slowly and that is what kept causing mine to knock.  ]]> Sat, 30 Nov 2013 00:19:33 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545481&title=knocking-mp40s#545481 <![CDATA["Knocking" MP40's : Grab the wet side and rotate it...]]> http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545480&title=knocking-mp40s#545480 Author: love2skiutah
Subject: 68050
Posted: November 30 2013 at 12:12am

Grab the wet side and rotate it while it's on.  If that doesn't work, turn the pump off, pull the wet side off and reset it into place.  Mine do that every once in a while - ]]> Sat, 30 Nov 2013 00:12:28 +0000 http://www.utahreefs.com/forum/forum_posts.asp?TID=68050&PID=545480&title=knocking-mp40s#545480