plumbing question for external return pump

2slow95vert · 02/17/2018, 04:07 PM

setting up a new sump for my existing tank. Going with an an Iwaki MD 55 rlt which has 1" inlet/outlet. Any reason to use 1.5" for the inlet side? And should I hard plumb the inlet with PVC or does there need to be some tubing or flex PVC on the inlet side? Thanks

tkeracer619 · 02/17/2018, 04:19 PM

Any time you increase tubing size you will reduce head losses. 1.5" on the intake of a iwaki 55 is a bit overkill. I would use flex pvc on both the intake and output of the pump to reduce any noise or vibrations.

ReefkeeperZ · 02/17/2018, 04:48 PM

definitely flex tubing, absorbs shocks, reduces noise transfer, reduces overall strain on the plumbing.

02/17/2018, 04:07 PM	#1
2slow95vert Registered Member Join Date: Dec 2014 Posts: 5	plumbing question for external return pump setting up a new sump for my existing tank. Going with an an Iwaki MD 55 rlt which has 1" inlet/outlet. Any reason to use 1.5" for the inlet side? And should I hard plumb the inlet with PVC or does there need to be some tubing or flex PVC on the inlet side? Thanks

02/17/2018, 04:19 PM	#2
tkeracer619 Registered Member Join Date: Jan 2006 Location: Westminster, CO Posts: 17,289	Any time you increase tubing size you will reduce head losses. 1.5" on the intake of a iwaki 55 is a bit overkill. I would use flex pvc on both the intake and output of the pump to reduce any noise or vibrations. __________________ Hobby Experience: 9200ish gallons, 26 skimmers, and a handful of Kent Scrapers. Current Tank: Vortech Powered 600G SPS Tank w/ 100gal frag tank & 100g Sump. RK2-RK10 Skimmer. ReefAngel. Radium 20k.

02/17/2018, 04:48 PM	#3
ReefkeeperZ Registered Member Join Date: Apr 2015 Posts: 392	definitely flex tubing, absorbs shocks, reduces noise transfer, reduces overall strain on the plumbing. __________________ insert witty catchphrase here