10 gallon sump

Do you have any pictures of it?

 

I'm just saying to match the gph rating of your pump to yout OF, taking consideration for head pressure. Match the two. so if you want 200gph for your overflow, then your pump should be at least 200gph. You can always put a ball valve on the return to lower the pressure. Do not put it on the overflow.

200gph on the pump you linked to is at 0' head pressure. At 3' you will have about 1/3 - 1/4 of that.

 

I would put a ball valve right after the overflow box because you will have noise issues and that helps alot. I do not use a ball valve on the return line at all.

This is a very bad idea, a hob over flow is a little nosy, but your going to get water on your floor eventually if you choke it back. All the systems that choke down your out flow from the DT (to make it quiet) have a back up in case things change because they will change. You can get snails over the back and in there (happened to me with my hob over flow) and just algae growth will slow down you out flow and you will most likely have a problem. In my experience hob over flows can develop bubbles and just slow down and some times even stop if don't have just the right flow or mess with them from time to time, or have the pump driven one.
Choking down one side of the out flow (to the fuge) will only divert water so you can keep the flow. I would try using the tube to vent the air method for quieting down your hob over flow.

 

Yeah that's how i have it drawn up; ball on the return. should i get the next model up from that then. it has 370gph max head of 6'.

 

you can also use non scented plain kitty litter for a DSB. very cheap and just as effective IMO

 

Yes, that would be better.

 

It's not a matter of how much suplus head capacity you have. It's the pump output when working against a 3 foot head pessure. The rated output of pumps are rated at 0 head pressure. The 4 foot head tells you how high you can push any water at all.

It's been a long time since my fluid dynamics class but if I remember correctly you will probably get a flow rate of about 50-75 gph out of that pump with a 3 foot head. I would go with a pump that was rated at about 500 gph and then use your ball valve on the return line to throttle it back. Note: never restrict the input line to the pump only the output, otherwise you will burn it up.

Steve W

 

Okay thanks steve!

 

The center brace is in the way, but it gives you the idea.

 

I have a small sponge that covers the hole so snails will not be able to clog the hole. The water is not being slowed, only air is being prevented from being sucked down with the water. If I take the small sponge out some noise returns, so the sponge not only acts to keep snails out but to muffle the last little bit of noise.