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bigfish99
10/07/2008, 10:08 PM
From what i've read on RC, One should double the outlet size for maximum flow and for minimum heat problems so the size of my pvc used should be 2" since my outlet is 1" is this correct. oh and by the way my pump used is a mag 18.

sjm817
10/07/2008, 10:15 PM
If you want to get the max flow, yes, double the outlet size. It wont make any difference in the heat.

bigfish99
10/07/2008, 10:34 PM
thanks for the quick responce scott, can you answer another question 2"is a bit big if I go with 1.5" pvc will thier be much difference in flow, since I already bought 1.5 pvc, I`ve been running my mag 18 with 1' clear tubing and was told pump is probably adding heat to the tank using this 1'' size is this possiable thanks bigfish

sjm817
10/07/2008, 10:38 PM
The bigger the plumbing diameter, the greater the flow. You will see a large difference between 1" and 1.5". The pump is water cooled. It will add heat no matter what size plumbing. The larger plumbing will allow more flow which will increase the wattage used, and will actually increase the heat.

bigfish99
10/07/2008, 10:52 PM
hey scott, what does the word cavitation mean when being used in responce to a pump question. if any explanation would be deeply appreciated. thanks, bigfish

bigfish99
10/07/2008, 10:56 PM
also I`m using educators on the return outlets which are 3/4" is it ok to go from 1.5" pvc to 3/4 pvc to accomadate educator.--bigfish

sjm817
10/07/2008, 10:56 PM
Bubbles that form in the pump. It is usually cause by a restriction on the intake side. Always restrict flow on the output side if you need to reduce flow.

sjm817
10/07/2008, 10:58 PM
<a href=showthread.php?s=&postid=13505186#post13505186 target=_blank>Originally posted</a> by bigfish99
also I`m using educators on the return outlets which are 3/4" is it ok to go from 1.5" pvc to 3/4 pvc to accomadate educator.--bigfish
Yes. Run the larger plumbing for as much of it as you can,