Pipe diameter for closed loop

Willy18T

Premium Member
I am going to set up a closed loop system on my 75 gallon using a Reefflo Snapper pump and an oceans motions super squirt. My question is the pump has a 2 in inlet and a 1.5 in outlet. Do i have to use a 2in bulkhead along with 2 in piping going to the pump and then what about the piping from the pump to the OMss? I have to take it from 1.5 in on the pump to 1 in on the OMss unit. I know since this is closed loop it will work off of pressure so what is the smallest i can make the bulkhead and pipe bring the water to the pump?
 
Definitely 2 inch on the intake side, no less. You also want to try and put the OM as close as possible to the tank so your 1" runs are as short as possible.
 
I had to use 1.5" spaflex and adapt it to 2" at the pump inlet. I didn't have room for 2" hard pipe through my floor to the basement. I know it will reduce flow, but it couldn't be helped.
 
You want to have the total area of the feeds to be at least 2", I use 2 1.5" bulk heads. T off right before the squirt for a by pass that can be fed strait into the tank and reduce the other side to 1" as it enters the squirt.
 
The setup I'm running on my 135 for the CL is this:

2 x 1.5" bulkheads in the back of the tank, that Y together into a 2" feed line into the snapper. I wouldn't run anything less then 1 x 2", or 2 x 1.5" to feed a reeflo pump (dart or snapper) with a 2" feed size.

Outbound, while still 1.5", and before the Super Squirt, I have a T and bring off a 1" line into a valve as a bypass.

I then drop down into 1" right at the SS, and use 1" spa-flex outbound to the 4 1" CL bulkheads.

The line T'd off before the SS is split down to a couple of 1/2" lines, and run up to bulkheads high in the back of the tank where lockline is used to direct them into corners and behind rocks to catch places where the flow from the OM output doesn't reach.

~K
 
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