+Mlaw Posted March 26, 2014 Share Posted March 26, 2014 So I'm working on plumbing my overflows and have been told that I should make the stand pipes a larger diameter than the pipes that take the water to the sump. So 3/4 in the display and 1/2 under the tank. Does this sound right? Quote Link to comment Share on other sites More sharing options...
Sherita Posted March 26, 2014 Share Posted March 26, 2014 No idea. What is the reasoning behind this? I've always made them the same size. Where did you hear this from? 1 Quote Link to comment Share on other sites More sharing options...
FarmerTy Posted March 26, 2014 Share Posted March 26, 2014 I caught that information on the durso website, but plumbing is the weakest part of my game when it comes to tanks so take the info for what its worth. http://www.dursostandpipes.com/make-your-own-durso-standpipe Quote Link to comment Share on other sites More sharing options...
+reeflover Posted March 26, 2014 Share Posted March 26, 2014 The overflow kits that came with my 220 both have 1' return and 1' drain pipe. So i plumbed them same 1' pvc. Or at least that was the size of the bulk heads. The only difference is the durse pipe inside the overflow box, durse pipe is 2' while the return is still 1' Quote Link to comment Share on other sites More sharing options...
+SChrisEV Posted March 26, 2014 Share Posted March 26, 2014 I've never hear that, I'd be interested to know the logic behind it. I have a 1" drain from the standpipe down to the sump. Unless the purpose is to reduce the flow, to reduce the noise, I don't see this being beneficial. You will be creating a bottleneck, literally. Quote Link to comment Share on other sites More sharing options...
+Mlaw Posted March 26, 2014 Author Share Posted March 26, 2014 from the site JeeperTy referenced: "With 1 inch and smaller bulkheads the standpipe's PVC diameter needs tobe larger than the bulkhead to work correctly. I get a lot of e-mailquestions on why this is. Honestly, I’m not sure." oh okay, You don't know why to do it but I need to do it? hmmm. if you were going to do something like this I would think you would want to do it the opposite way so that the larger pipe was on the bottom so as to prevent a bottle neck. Quote Link to comment Share on other sites More sharing options...
FarmerTy Posted March 26, 2014 Share Posted March 26, 2014 From a flow perspective, a 1" bulkhead will only let a finite amount of flow through it per second. I think the idea was to have excess water on the top side versus the drain side so that you will have less of a likelihood to be deficient in flow to possibly cause bubbles and gurgling. Basically jam more water through that bulkhead on the top side than it can handle so you always have positive pressure on it thereby reducing your chances of developing of bubbles or causing a bad case of the gurgles. That's my best hypothesis, but I am not a flow expert in any sense of the word. Quote Link to comment Share on other sites More sharing options...
Veni Vidi Vici Posted March 27, 2014 Share Posted March 27, 2014 That dosent sound right... Im doing a Bean Animal and its 1-1/4 x1" street elbow into a 1" bulkhead into 1-1/2" drainpipe... Getting smaller would create resistance, even with a siphon I would think. Then again ive heard crazier things and thinking isnt my strong suit, Quote Link to comment Share on other sites More sharing options...
mFrame Posted March 27, 2014 Share Posted March 27, 2014 The bigger pipe on top will definitely reduce noise. Just speaking from experience here... I wouldn't do anything smaller than a 3/4" though, 1/2" just isn't large enough in most cases for the size tanks I've had. If you're going to put a hole in glass, put a bit larger than you want. You can always throttle it. Quote Link to comment Share on other sites More sharing options...
+Mlaw Posted March 27, 2014 Author Share Posted March 27, 2014 I already have the hole and really don't want to make it any larger. I'm thinking I'll use 1 inch on the top and neck it down to 3/4 at the bulkhead and use 3/4 below. Quote Link to comment Share on other sites More sharing options...
JR Renteria Posted March 30, 2014 Share Posted March 30, 2014 Mlaw, do you have bits for drilling holes? I am wanting to get a different tank, & looking for someone to cut a 3/4" & (2) 1/2" holes.... If you do, how much would it cost?? THX Quote Link to comment Share on other sites More sharing options...
+Mlaw Posted March 31, 2014 Author Share Posted March 31, 2014 Sorry this tank came pre drilled. I know the club has some bits that it loans to premium members. Glassholes.net also sells them Quote Link to comment Share on other sites More sharing options...
JR Renteria Posted March 31, 2014 Share Posted March 31, 2014 OK, thx Quote Link to comment Share on other sites More sharing options...
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