PH and water density/flow?

sphelps · #1 09-09-2009, 05:00 PM

If your salinity changes from daily evaporation your density will change which can effect flow. In addition if your sump level changes from evaporation the pump head pressure will change which will also alter flow. Herbie overflows are fairly sensitive and usually require an ATO to keep things stable.

Another solution would be to change the back up drain to a standard standpipe and adjust the flow so some water enters the back-up (standpipe) drain. This way if your flow increases or decreases slightly you will avoid annoying gurgling sounds. The overall noise will be slightly louder than a traditional Herbie but may be acceptable depending on your requirements.

PH will not directly effect flow.

banditpowdercoat · #2 09-09-2009, 06:44 PM

I have an ATO, Salinity and sump level do not change, other than with the level in the herbie

Jason McK · #3 09-09-2009, 07:55 PM

I believe Untamed had this same problem maybe PM him on his solution

sphelps · #4 09-09-2009, 11:37 PM

pictures of your sump and general plumbing setup would be helpful.

banditpowdercoat · #5 09-09-2009, 11:48 PM

No pics, but pretty basic sump setup. 1" Herbie flows into sump, through some baffles, and Little Giant 4 pumps back to tank. Only other thing running off the LG is a Phos reactor, at a reallly low flow. I just got a Kill-A Watt. Checking the voltage at the pump from lights on/lights out. Should not have a drop, but you never know.

BlueAbyss · #6 09-10-2009, 12:59 AM

Do you have a ball valve or a gate valve on your herbie? I understand some ball valves are 'inaccurate' or hard to adjust, and I've heard of valves 'adjusting' themselves under pressure... could be the valve.

banditpowdercoat · #7 09-10-2009, 01:08 AM

Quote:

Originally Posted by BlueAbyss

Do you have a ball valve or a gate valve on your herbie? I understand some ball valves are 'inaccurate' or hard to adjust, and I've heard of valves 'adjusting' themselves under pressure... could be the valve.

Ya forgot to add, got a gate valve. Next step is a flowmeter on the sump return line, see what the pump is acctually pumping up to tank.

It's not a major problem, just gets annoying as every 1-2 days I need to adjust the gate.