Dumb plumbing question

[mrrrkva]

OK, got a 200 gall RR. Bulkheads only seem to accept plumbing on the inside threads of the Bulkheads. Which come out to 1" on the Drain lines and 3/4 on the return lines. Is this right? Seems like I could use bigger plumbing if it threaded on the outside, but nothing seemed to fit.
Was going to run 1" return plumbing to a 2X 3/4 T. It is on an Iwaki 40, will this restrict any water flow??

 

[brokekyle]

welcome to the club.. I got fooled the 1st time too.. and yes you are correct.. the only pipe thread on bulk heads are the inside threads.. however you can use fllexible tubeing and a hose clamp if you'd like to use the OD..

 

[EEreefer]

The outside threads are for the "nut" that holds the bulkhead to the tank, only. IME those aren't standard pipe tap sizes so your probably SOOL on finding an adapter :wink: If I understand you, the drain from the tank has a 1" threaded bulkhead and the returns back into the tank are 3/4" threaded bulkheads. If your pump has a 1" outlet to the tank then you want to use AT LEAST 1" piping from the pump output as close as you can to the 3/4" bulkheads then tee off there with short pieces of 3/4" to make your connections. Also, don't forget unions and ball valves to allow you to disconnect/remove/replace things without draining the tank. JMO.

 

[mrrrkva]

I got the ball valves and quick unions and LOWES. I dont think they have had many people from our area "plumb" a fish tank. Thanks for all your guys help, just wanted to use the biggest Diameter i could, at least on returns.

 

[Anonymous]

Just run the return plumbing outside up the back of the tank. Its easier to deal with anyway, and you can use the3/4 line for an additional drain line or for making water changes etc.

 

[Sebastian]

Don't you just love the look on their face when you tell them what you're doing! :lol: :lol: :lol: