Quote:
Originally Posted by sleepydoc
Yes, barbed fittings definitely add significantly to head pressure and therefore reduce flow. I was plumbing a Fluval SP4 and tried it with a section of vinyl tubing and then a section of flex PVC. The tubing had about a 15% drop in flow IIRC. Best way to see this is to look at the size of the hole on a ¾" barbed connector. It's closer to ½"
Can you use spa flex or ultra flex PVC? They will give you the flexibility of vinyl tubing without the drawbacks.
Regarding the return plumbing, plumbing resistance is additive, so even though your bulkhead is 3/5", there is likely some benefit to upsizing the pipe. I'd play around with some headless calculators to try and get an ide how big of a difference it will make.
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The barbed fittings would be on the 3 drains. Could I just use a street fitting with a clamp?
I already bought the braided vynil. What do you mean by flex pvc or the spa flex? Do you have a link?
Quote:
Originally Posted by lucky777
So I'm building my first salt setup and my 150 g will be plumbed to a 55 gallon sump in basement. I drilled my 150 and installed a 3 drain bean animal overflow system that I purchased. My return is drilled for 3/4". My overflow box has 1" bulkheads and will drain through sc40 1" standpipes. I have no choice but to use 1" braided vynil tubing for the rest of the run to basement. I thought my return size should be smaller then my drainage lines so that the overflow is always ahead of the return. Now if I use the 1" pvc standpipes fitted with a barbed adapter to fit the vynil hose will I lose a lot of the drain flow due to the smaller inner diameter of the barbed fitting? Does it really matter?
Also would you just use 3/4" hose for return? Someone mentioned adapter to make the return pipe 1" even though the bulkhead is only 3/4" in order to decrease head pressure on pump. The local plumbing shop said to just use 3/4". What do you think?
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