Why would flow through a durso slow down overtime?

[LowCel]

I know this is probably a dumb question but why would flow through a durso standpipe slow over time? I have checked for blockages and there are none but still over the past two years I have had to slowly reduce the flow coming from my return pump (dart).

Tonight my wife called me and informed me that our downstairs had turned into a wading pool, which isn't a good thing.

Also, the air hole on the top of the durso, does smaller allow more flow or does a larger air hole allow more flow? I would much rather have a little noise than another flood.

 

[dr_sudz]

is the air hole clogged? might cause back pressure slowing the flow of water, maybe.. just winging this one. The hole to let air in is to help flowing water to pass easier through the drain back to the sump if the drain exit is below water as well combined with a narrowing air hole could cause issues.

 

[LowCel]

is the air hole clogged? might cause back pressure slowing the flow of water, maybe.. just winging this one. The hole to let air in is to help flowing water to pass easier through the drain back to the sump if the drain exit is below water as well combined with a narrowing air hole could cause issues.

I clean the hole out regularly with a pipe cleaner so it isn't clogged. The drain is under water in the sump but I removed the lower section and had the end of the drain well above the water line and it still over flowed when testing it.

I have the output of the dart down almost as low as it will go now.

 

[dr_sudz]

is your plumbing all positive draining right to your sump? check the overflow box as well to make absolute there are no clogs.. other wise this make no sense. there has to be a blockage some where usually its the pump that slows over time

 

[LowCel]

is your plumbing all positive draining right to your sump? check the overflow box as well to make absolute there are no clogs.. other wise this make no sense. there has to be a blockage some where usually its the pump that slows over time

Yes, both overflows go to the sump and it has gotten slower over time and I certainly realized that it makes no sense.

What sucks is that my wife has pretty much decided that one more flood and I'll be keeping one less tank. Normally I would argue but after sopping up so much water I really don't have a leg to stand on right now.

 

[dr_sudz]

Positive draining means that there is no bends that would make the water fight gravity, everything should be in a downward flow. you shouldn't have any water trapped. is this a commercially done bottom drain? I would try and remove the dursal and see if, all be it noisy, works better.

 

[LowCel]

Positive draining means that there is no bends that would make the water fight gravity, everything should be in a downward flow. you shouldn't have any water trapped. is this a commercially done bottom drain? I would try and remove the dursal and see if, all be it noisy, works better.

Oh, sorry. There are no bends that would be against gravity. Unfortunately I can't remove the durso without breaking out the pipe cutter.

Here is a short video of my filtration.

[YT]KrDT98JlF40[/YT]

 

[dr_sudz]

I can't really see the drainage part of the tank, is it corner overflows? The corner overflows shouldn't be glued in if they are bottomed drained. And how is the water getting to the sprayer over the pot scrubbies?

 

[LowCel]

I can't really see the drainage part of the tank, is it corner overflows? The corner overflows shouldn't be glued in if they are bottomed drained. And how is the water getting to the sprayer over the pot scrubbies?

The tank is a GlassCages tank with the overflows about a foot (give or take) from each side. The sprayers over the pot scrubbies come from a power head located where the overflows drain in the sump.

 

[flamenco-t]

How big is your overflow pvc ?