Octopus Skimmer Mods
- Thread starter Roland Jacques
- Start date
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Avast Marine
.Registered Member
I ordered my gate valve from savko yesterday. I will post pics when I mod it. Out of curiosity what is the reasoning for the Tee at the riser pipe vs. just a 90 Ell?
Avast Marine
.Registered Member
Is it really needed? I was thinking just putting the gate valve on and running a pipe vertical with the foam sleaves on it. Just like the way it comes only with a gate valve. As long as the top of the pipe is lower than the bottom of the union I don't see any issues or am I missing something?
question i posted in the ro thread, but thought the mod section would be a good spot for it...
regarding the use of air pumps to help push more lph.
when i asked the question in the past, the answer i was given was that a pump can only take a certain amount of air before it cavitates.
however, there seems to be plenty of room for more air in regards to the ocean runner pumps, unless they are somehow inferior in this capacity to the sedras used by euroreef.
<strong>water flow/ air intake
er sedra 3500 350ghp/440lph
er sedra 5000 500gph/660lph
vs
ro nw150 630gph/400lph
ro nw200 900gph/600lph</strong>
as the numbers show (if accurate) the ocean runner pumps are sucking less air than even their smaller sedra counterparts. other than changing the impeller which would either be: impossible, difficult/pia, or just too pricey, why not help it out with a little "push".
remember, the air pump isnt meant to push 50gph of air into the ocean runner, but instead, just help it out to achieve the same numbers put out by the comparative version of euroreef's sedra-impeller combo.
thoughts?
regarding the use of air pumps to help push more lph.
when i asked the question in the past, the answer i was given was that a pump can only take a certain amount of air before it cavitates.
however, there seems to be plenty of room for more air in regards to the ocean runner pumps, unless they are somehow inferior in this capacity to the sedras used by euroreef.
<strong>water flow/ air intake
er sedra 3500 350ghp/440lph
er sedra 5000 500gph/660lph
vs
ro nw150 630gph/400lph
ro nw200 900gph/600lph</strong>
as the numbers show (if accurate) the ocean runner pumps are sucking less air than even their smaller sedra counterparts. other than changing the impeller which would either be: impossible, difficult/pia, or just too pricey, why not help it out with a little "push".
remember, the air pump isnt meant to push 50gph of air into the ocean runner, but instead, just help it out to achieve the same numbers put out by the comparative version of euroreef's sedra-impeller combo.
thoughts?
Avast Marine
.Registered Member
I like the vertical exit, and am not against the sponges. This setup actaully works quite well. If it needs a vent do you think it would work to put the tee below the gate valve like this............
<a href="http://www.flickr.com/photos/58279226@N00/211947858/" title="Photo Sharing"><img src="http://static.flickr.com/63/211947858_fc59a48917_o.jpg" width="800" height="700" alt="skim" /></a>
<a href="http://www.flickr.com/photos/58279226@N00/211947858/" title="Photo Sharing"><img src="http://static.flickr.com/63/211947858_fc59a48917_o.jpg" width="800" height="700" alt="skim" /></a>
RichConley
New member
Thats not the only issue, the valve is also getting wet. Some of them have metal shafts for the knob, and I'd rather not have that underwater.
RichConley
New member
Nemo, now you get into the fun part of skimmer design.
The reason is that the ER/Deltec/H&S pumps (and Aquamedic x700 pumps) all seem to have modified volutes with larger intakes and outputs. The OTP pumps are essentially the stock line of OR pumps, ie the x500 series, with a NW jammed in them.
What this allows is a better mix., as well as more water in/out (the otp3000 moves NOWHERE near 900gph with air, its like 300gph). Thats what I've been working on with mine. I've seriously opened up the output and input on the pump, and the air intake has gone up a huge amount. I just need to wait for the new flowmeter to get here before I can give numbers.
<a href=showthread.php?s=&postid=7911807#post7911807 target=_blank>Originally posted</a> by dandy7200
from their site:
You mean to tell me i put the gate valve on the wrong part of the T?
I have mine on the under side of the T, between it and the skimmer....is that wrong place for it?
G
RichConley
New member
It really shouldnt matter all that much. The point is to be able to adjust the water level with the valve, without making it a siphon line.
RichConley
New member
Just fine D-Rod. What size tank?
Roland Jacques
Premium Member
Pictures Please
PS. get a l/m flow meter. if you can (unless it is free
) i have 3 scfh flow meters, and my numbers dont jive with anyone using a LPM on any pump i test? Conversion and all.
Avast Marine
.Registered Member
He's holding out on us until his work is done and can measure the results. But one picture couldn't hurt................
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