Reeflo Hammerhead 2" outflow attachment

[pondfrog]

THought I would post here as if you have a hammerhead pump you probably have a large tank!

I was planning on running 2" off this pump and it has a 2" slip or 1.5" threaded port for the intake and outtake.

I called the company yesterday to see how to glue the 2" PVC onto the pump. They indicated they would use only silicone! As the housing is made out of polypropelene it will not bind with PVC glue.

I found this kind of interesting and when I questioned further the representative indicated he probably wouldn't go this way, but would rather use the 1.5" threaded port.

I already have all the 2" stuff, and could expand from 1.5 to 2" before and after the pump, but why if I can do it another way?
Surely, someone here has attached to a hammerhead pump using the 2" slip.

How did you do it?

THanks,
Steve

 

[sidewinder770]

On my hammerheads and Barracudas I just used the 1.5" thread to 2". One reason is if you want to take it off it's easy . I put a 1.5" mpt - 2" slip directly into a 2" union into a 2" ballvalve, makes it easy to remove the pump if you need to.

 

[pondfrog]

Thanks Scott,
do you feel , or know, how much it cut down on your flow?
I believe it should mildly- right?

 

[pondfrog]

Anyone else use a hammerhead at 2" ?

 

[gobygoby]

just curious why you want to? you will lose pressure.

 

[pondfrog]

? I assume what you mean is that through 1.5" pipe the same amount of water flow will have a higher pressure? I agree, but..

I would also think that 2" pipe may be ABLE to move more water volume than a 1.5" pipe on the same given pump. For my application I am not concerned about pressure of water returning to the tank, but volume.
All water movement issues will be addressed in tank with waveboxes and streams.

Does that make sense or am I a physics nightmare!

 

[gobygoby]

maybe I am totally wrong, but wont the pump push the same amount of water regardless of the tube size....the only thing that would change would be the rate at which it flows.???

Here is how I understand this:
you will get a large amount of water slower with large tube and smaller amount of water but faster with smaller tube.....

So basically you will get the same amount of water....but the speed at which you get it will change.??

like I said, I am probably wrong, but Thats how I see it.

Goby

 

[pondfrog]

I guess that is partially true and maybe at the dimension differences I am talking it is completely true.

But take for example the extreme-- hook up a 1/2 pipe to the pump or a 3" pipe to the same pump. I would have to believe you are going to get less volume in gph out of the smaller size pipe due to linear friction etc.

But, like I said it may be a moot point between 1.5" and 2",

 

[mbbuna]

i dont think you will increase volume buy going to a 2" pipe. if you look inside the inlet and outlet ports on the pump they are restricted to 1 1/2", so even if you have a 2" or 3" pipe the impeller housing is restricted to 1 1/2"

 

[pondfrog]

good point

 

[sidewinder770]

I agree- I don't think there is much difference between 1.5 and 2" but where there could be a difference (and why I went with 2") is in head loss. Larger diameter pipe with larger sweeping curves will have less resistance and less head loss. I know this to be true in my case but then again I have an over 60' run from the tank to the sump and 9- 90 degree bends. At first I had a hammerhead pump for my sump return and based that selection on my head loss, bends and flow rate of the overflow- turns out I had a lot more flow due to the increased pipe diameter and had to go with a lower flow Barracuda pump to get the correct GPH. Hope that made sense

 

[pondfrog]

hmm, now you have me thinking. The head pressure is exactly why I got the hammerhead.
I only have about 30' to run through and an 8' climb out of the basement and about 4 -90 bends. How big was your tank Scott?

 

[apjunky]

Sounds like about the same setup I have , 30 feet sideways and 12 feet up . I use the hammerhead with 2" PVC hose . 1 1/2" off the pump into a 2" ball valve , 2" hose and then back to 1 1/2" pvc again at the aquarium . I am moving about 2200 GPH but have the ball valve shut half way off . Hope this helps .

 

[pondfrog]

Thanks apjunky!