Sailfish Posted September 28, 2014 Share Posted September 28, 2014 Hi! I'm about to go ahead and buy the plumbing parts that I need for my next 24G system.I'm going with the beananimal overflow, so I will have a gate valve one one of the three drain pipes. The problem is that I want to go with as small bulkheads as possible, to make the overflow as narrow as possible, and the smallest diameter gate valve that my LFS has is a little bigger. They have 20mm bulkheads, but the smallest gate valve is 25mm.My question is simply: will having a 20mm full siphon drain pipe expanded to 25mm, with a PVC adapter, before the gate valve and then running 25mm pipe into the sump introduce any air in the drain pipe? Or will it still be void of air, only that the water velocity decreases when the pipe diameter increases? Link to comment
k4ndyk1ng Posted September 28, 2014 Share Posted September 28, 2014 no air will come in the pipe because there is no where it can enter, however look online for the gate valve you want it will be cheaper and more convenient Link to comment
Sailfish Posted September 28, 2014 Author Share Posted September 28, 2014 no air will come in the pipe because there is no where it can enter, however look online for the gate valve you want it will be cheaper and more convenient That is the problem, I can't seem to find any normal plumber shops that carry items like bulkheads and gate valves. It would probably be much cheaper, but I can't find it! Can anybody help me with this? I thought my googling skills were pretty decent, but it doesn't really feel like it now I need it shipped to my study place, in Poland. Link to comment
k4ndyk1ng Posted September 28, 2014 Share Posted September 28, 2014 That is the problem, I can't seem to find any normal plumber shops that carry items like bulkheads and gate valves. It would probably be much cheaper, but I can't find it! Can anybody help me with this? I thought my googling skills were pretty decent, but it doesn't really feel like it now I need it shipped to my study place, in Poland. Bulk Reef Supply will have them if you are in the us, and rock n critters if you are in the uk. Link to comment
Sailfish Posted September 30, 2014 Author Share Posted September 30, 2014 Bulk Reef Supply will have them if you are in the us, and rock n critters if you are in the uk. Thanks for the help, but Bulk Reef Supply does not want to ship to Poland and Rock N' Critters was way more expensive then my LFS, while still not having any smaller pvc parts I'll probably just go with the 20mm bulkheads and increase diameter to 25mm on the drain pipe with the gate valve Link to comment
nibor Posted October 1, 2014 Share Posted October 1, 2014 They don't have gate valves but these are two German stores you may find useful in the future. http://www.sewatec.de http://www.aquaristic.net Beananimal's original design uses 1 inch bulkheads stepped up to 1.5 inch standpipes so you are doing the same thing as the original design but on a smaller scale. He stepped the pipe size up immediately after the bulkhead. http://www.beananimal.com/projects/silent-and-fail-safe-aquarium-overflow-system.aspx Link to comment
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