11 LPM too much for a 3" skimmer riser?

[foshizzle]

I'm pulling 10-12 LPM with a meshmod OR2700. Do I need to go with a 4" riser?

Skimmer body is 6"x 18"

[prance1520]

bump for a good question

[bebitte70]

I am wondering also as I want to mod a css body.

[Malifluous]

Hey foshizzle, sorry to change the subject but I wanted to ask you if your meshmod is heating up the tank. I meshmoded an OR3700 and it is heating water up to 110 F. It was only 5 gallons of water but im still afraid to run the pump this way as it may just burn up. If its not too much trouble, i would like to see how u made your mesh impellor cos Im pulling 10-12 LPM also and thats with an OR3700. You would think I should be able to pull more than an OR2700. I was only abe to fit 2 layers of mvagi mesh. WHat is the diameter of your venturi hole? Thanks for yor time.

[dsquared]

Malifuous,
I meshmoded a serda 5000 & it heated my water. I found that I didn't trim the outside edge of the mesh enough & if rubed the housing, which made the pump work harder, which made heat.
Dave

[foshizzle]

Originally posted by dsquared
Malifuous,
I meshmoded a serda 5000 & it heated my water. I found that I didn't trim the outside edge of the mesh enough & if rubed the housing, which made the pump work harder, which made heat.
Dave

This is probably your problem. Does the OR start on its own without you blowing air into the line? My pump doesn't start on its own. I need to do a little trimming myself.

You should be pulling more than 12LPM but on the other hand it could be a venturi problem. My venturi fits 3/8 OD line. I only used 2 layers of mesh also. I only got an extra 1LPM with 3 layers.

anyone got input on my intitial question...

[Malifluous]

The pump doesnt start on its own. I really need to smack it hard or remove it from water and let it get spinning then submerge it. There is no mesh that i can see touching the housing.

If you can find out the height of the riser for any other factory made skimmer that pulls 11-12 lpm that may answer your question.

[foshizzle]

I was refering to riser diameter. The deltec apf200 pulls about the same and I believe it has a 3" riser. Mine is about 6 1/2" tall

I meant to say 1/4 on the venturi line btw

[kentrob11]

You're fine with that diameter riser- You guys who are having heat problems with your pumps need to do some mesh trimming. You shouldn't have any rubbing anywhere....

[purereefer]

that riser sounds fine, i run about 75lpm through my 4" riser, and that wasnt a typo, really 75lpm. gotta love air pumps

Tim