Sizing mazzei injectors and pump for large skimmer

[Piper27]

I am having a new skimmer made and I can't find any info on which mazzei's to use.

The skimmer will be 5' tall and 10" in diameter. I should I use one big mazzei or two 1078's?

[Piper27]

It is going to be setup as a external recirculating and I will probably feed with a large high pressure pump like a barracuda or something similar. I also will have a 2' extension made so I would like to be able to run the right pump and injector that's capable of handling the extra 2' of height.

I would love to use a pump with less wattage but DC pumps are not made to run mazzei injectors real well and I want something rock solid. I would be worried about them breaking as well. But if there are DC pumps out that would run this skimmer I would love to give it a try.

Is there another option that runs less watts that I can use?

[wolfblue]

A 1078 is a big injector and I think one would be plenty for that skimmer, with the right pump. You might try the Mazzei Injector Selector Tool (http://injectorselector.mazzei.net/) or try to figure out what RK2 (http://www.rk2.com/protein-fractionators-saltwater.php) does with that sized skimmer. But a hint is my smaller Mazzei's are 1.5" with 1 HP dedicated pool pumps.

[bayoupr]

Mazzei 1078 is 1" NPT. I ran one on Jeff's 48" & 60" skimmer and it work fine but these are only 6" dia. But 5' x 10" dia I would go with two for sure. What size couplings are you putting in the skimmer for the inlet?

[Piper27]

I was going to put two 2" 1078's one for the intake and one for the bubble plate after the mazzei or mazzei's tie together. I was thinking two mazzei's would be OK but if I add the 2" extension later and make it 7+ feet tall I am not sure. Maybe even three 1078's would be better and just run the third with the extension. It is a good idea to check what r2k is using. I emailed them with questions about a few things and it seems they don't want to communicate if I am not purchasing something... I was wondering what fittings they use for the wash down feature.

I saw the calculator thing but was wondering why it needs all my info to get to it, is it a forum or something?

[azjohnny]

From some earlier threads I have heard owners of venturi MTC skimmers getting better results from multiple 3/4" injectors vs 1078 model

http://reefcentral.com/forums/showthread.php?t=2444252&highlight=mtc+skimmer

[Piper27]

Is that what the really large skimmer in that thread uses? 6 3/4" mazzei's? So I guess three 1078's would be too much.

I can't find out what the 10" r2k skimmer is using...

[johnike]

I've got a 978 laying around if you can use it.
Freebie.

[Piper27]

That's nice of you I appreciate it! I am not sure which I am going with yet though.

[wolfblue]

It is a good idea to check what r2k is using. I emailed them with questions about a few things and it seems they don't want to communicate if I am not purchasing something... I was wondering what fittings they use for the wash down feature.

I saw the calculator thing but was wondering why it needs all my info to get to it, is it a forum or something?

I think the Mazzei thing wants info so they can do sales calls. I never tried it though. And the RK2 guys are sort of the quite types if your not buying. But I do buy so I sent an email to my guy there this morning asking what size they use on that 10".

The thing about 1" venturis is, they squeeze down to about 3/8" inside and you need a pressure drop of 12-15 psi across the venturi. So you need a pump that makes your target flow at 27.7-34.7 feet of head. I have 1.5" and 2" Mazzei's running here. The 1.5" are using dedicated pumps up to 3HP. I have a 300GPM RK2 skimmer with one 2" venturi on a 1.5HP pump but that thing is 4' wide and 10' tall. The 10"x84" RK2 uses a 1/8HP pump but that would be a carefully chosen pump. High head from the perspective of a hobbyist.

Maybe my guy will email back soon. But he might be at the aquarium operator convention this week. Me makes a living selling people like me things. I decided not to go this year.

[ca1ore]

FWIW, my dual-mazzei MTC recirculating skimmer uses two 3/4" injectors and a Blueline 40 (PanWorld 100) pump. It was originally designed with a 2' reaction column, but I swapped in a 4 footer instead. works great.

[Piper27]

So I could do 4, 978 mazzei's and only run two or three while its setup as a five foot and run all 4 when its setup as a 7'. I guess I should try the mazzei sizing page and fill it out. But if anyone has made a similar skimmer I would love to know what you used and how well it ran.

[Vinny Kreyling]

Piper27,I know Royal Exclusive is working on DC pumps.
They are also in Florida now so if you want a good DC pump check them out.

[Tigé21v]

Any updates on the skimmer build?