Pump/Return/Ball Valve

  • We are currently upgrading MFK. thanks! -neo
ShadowStryder

ShadowStryder

Bronze Tier VIP
MFK Member
Apr 4, 2007
6,365
971
749
Nunya
My pump is to strong for my over flow box, so my question is how much can I
throttle down the ball valve on the return and if it isn't enough then what other
options is there.
Can I put another U tube in the overflow?
I have read about putting a T in the return after the ball valve, do I just run the
T back to the sump?
 
Yes you can tee back to the sump. You can also use a valve to restrict flow back to the display tank, this restriction will appear the same as higher head to the pump.
 
Got a ball valve but having to throttle it down like 40%, I don't think that will be good for the pump.
 
Yeah fox is correct, they are called 'plumbacks'
Valve is positioned in the space between the tank & the plumback. Back-pressure ensures the laws of physics at met, in that water will find the path of least resistance.

Best to run your pump at full throttle & plumback what you dont need.
Less stain & potential cavitation, not to mention running temps.
 
So the T goes before the ball valve or after? What is stain and cavitation?
 
When I talked to you on the other board it was about not changing the plumbing from 3/4 to 1 inch and using a reducer, I have since changed the plumbing and the pump is to strong. Totally different question. All I want to know now is does the T come after the Ball valve or before.
 
Before.

Strain = Escalating Force Exertion
Cavitation = Water entering the eye of an impeller, experience a drop in pressure that is less that the water molecules vapour pressure. Ie, the minimalist value needed to ensure water doesn't boil.

When water is driven to the outer edges by centrifugal forces it gains momentum & pressure, so as you can imagine when that water turns to vapour it explodes & the minute water pockets that collapse turn to shrapnel. Might not seem a huge deal, however when you think they are nearing almost twice the speed of sound. You can see how micro bullets can inflict damage to a housing.

Does this make sense?.
 
[QUOTE='vspec';431608;8]Before.

Strain = Escalating Force Exertion
Cavitation = Water entering the eye of an impeller, experience a drop in pressure that is less that the water molecules vapour pressure. Ie, the minimalist value needed to ensure water doesn't boil.

When water is driven to the outer edges by centrifugal forces it gains momentum & pressure, so as you can imagine when that water turns to vapour it explodes & the minute water pockets that collapse turn to shrapnel. Might not seem a huge deal, however when you think they are nearing almost twice the speed of sound. You can see how micro bullets can inflict damage to a housing.

Does this make sense?.[/QUOTE]

Yes it does and thanks, and since you are being helpful and not an Azz, does my T
placement go after the ball valve. I don't want to downsize my pump as I am going to add a second overflow box.
 
You must log in or register to reply here.
MonsterFishKeepers.com
Top Bottom