Yeah a polarized lens and a white LCD screen is the surefire way to know. I use the polarized filter for my camera lens.
To drill or not to drill....
- Thread starter stingraybob
- Start date
Its very rare for the sides to be tempered. Also your label is very specific saying the bottom is tempered. Personally I would bet the cost of the tank the sides are not tempered. Of course if you have the means to check ,then you should, but your probably fine to drill into the sides.
well, ill find out this weekend cause im goin to order either the 700 or 1500 from glass-holes.com....which do you think for a 75g with a 976 gph pump at 5 ft of head, the 700 or 1500?
I'd go with the 1500. The rating is for max flow and I don't think they recommend running that close to capacity. The 1500 has 2 1.5 inch drains, so theoretically if one gets completely blocked the other can still drain all the flow. Also build up in the pipes could slow your drain flow eventually, so it can't keep up.
Yeah, not even close to capacity. Here's a 1.5" single line box handling a 3400gph pump
I thought you were using a syphon drain on that. The glass-holes overflow is durso style. I saw on a website they tested 1.5 inch bulkheads and found them to flow approximately 975 gph and glass-holes rates their overflows for a reason I'm sure. That's what I was basing my suggestion on. I haven't actually attempted to see what any sized bulkhead will flow at max capacity myself. When advising someone else I try to be a little more cautious on the information.
I know you're a lot more knowledgeable on sump related stuff. I actually get a lot of my info for setting up sumps from reading your threads. I'm learning and try helping out when I can though.
I know you're a lot more knowledgeable on sump related stuff. I actually get a lot of my info for setting up sumps from reading your threads. I'm learning and try helping out when I can though.
Yeah this was my 400g, just a simple overflow box and drain. No durso or Herbie or anything like that. There's a lot of factors that go into determining flow rates so it's not always a one-size-fits-all rule. I just don't understand how they're only getting 1500gph out of dual 1.5" drains?
I guess maybe they just leave plenty of room for error.
I looked at your 400 gallon thread again. It said on there that was a 2 inch drain that reduced to 1.5 inch at the sump. If it reduces at the end does that regulate the flowrate down to that of a 1.5 inch pipe or somewhere in between?
Their 3000 gph uses dual 2" drains and I know that seemed like a huge drain for that amount of flow.
I looked at your 400 gallon thread again. It said on there that was a 2 inch drain that reduced to 1.5 inch at the sump. If it reduces at the end does that regulate the flowrate down to that of a 1.5 inch pipe or somewhere in between?
Their 3000 gph uses dual 2" drains and I know that seemed like a huge drain for that amount of flow.
Yeah, the bulkhead in the overflow box was 2", which I then reduced down to 1.5" plumbing. The 1.5" is the bottleneck. Even if the rest is all 2", you're still limited to the amount of water that you can pass through that 1.5" pipe at any one time.
