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Old 02-18-2011, 05:45 PM   #21
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your tank connector,what size is it,it looks like 1.25" ID,is your pipe 1.5 ID or OD.
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Old 02-18-2011, 06:09 PM   #22
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the pipe im using is 1.5"

the hole in the tank is 2.5 inches where the bulkhead goes

the return from the pump is a 1" flexible hose
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Old 02-18-2011, 06:25 PM   #23
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well it looks like everything is sized correctly,was the return pump section on your 30g larger than this 40g return section?
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Old 02-18-2011, 06:55 PM   #24
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nope about the same
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Old 02-18-2011, 07:20 PM   #25
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is there any way something has got into the pvc pipe and is blocking it? a snail got into mine!! it went up and over my overflow box through the syphon pipe up and over the other overflow box and into my drain pipe.

1.5" pipe can take 2100 gph on a gravity feed so pipe size is ok as your pump is rated at 1900 gph
if the return pipe is clear then I'm afraid I'm at a loss and can only suggest you put a tee piece in the 1" flexible pipe and plumb it to the sump inlet with a valve on it,this will allow you to adjust the water flow to the DT.
Unless you want to run your drain pipe into a bucket and calculate the flowrate coming from your DT just to be sure its not blocked.
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Old 02-18-2011, 07:53 PM   #26
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are you sure about that? i always thought 1.5" was good for 1200gph.
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Old 02-18-2011, 08:31 PM   #27
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im putting a ball valve on both the drain and return. ill be able to adjust it from there
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Old 02-19-2011, 01:03 AM   #28
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im putting a ball valve on both the drain and return. ill be able to adjust it from there
a gate valve would give you better control.
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Old 02-19-2011, 05:29 AM   #29
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are you sure about that? i always thought 1.5" was good for 1200gph.
Doug
This is where I got the info!

GPM/GPH Flow based on PVC Pipe Size, ie, How much water can flow through Sch 40 Pvc Pipe Size 1/2" 3/4" 1" 1.5" 2" 2.5" 3" 4" 6"
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Old 02-19-2011, 05:31 AM   #30
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im putting a ball valve on both the drain and return. ill be able to adjust it from there
Don't put one on the drain just the flow!
The drain should drain flow rate is only governed by the return pump flow,which is why i think it may have a blockage somewhere!
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