reeflow advice

[bkelly]

Can you restrict a reeflow snapper down to 1000GPH roughly, (restricted on the outflow side)?
thanks

[Cal_stir]

yes, you can throttle back the outlet, never restrict the inlet as that can cause the impellar to cavitate, you could also run a bypass

[Lampshade]

lots of people do, but do a calculation on here to see what you are at. http://www.reefcentral.com/calc/hlc2.php. No reeflo's on there, but you can use it to find the head loss, then go here:http://www.reeflopumps.com/lowspeedhighflow.html Reeflo's lose flow very quickly if there's any back pressure, so most of the time after fittings, etc, you have 9-10' of head and are already at 1000gph. An easy way to do reduce more flow is to use a Tee and have a ball/gate valve that drains back to the sump. THat will redirect the flow without back pressuring the pump.

[TimT]

Restricting pumps on the outlet side is fine. When you throttle back a pump it uses less power but may generate some extra heat in the water.

[whatcaneyedo]

Originally Posted by Lampshade

lots of people do, but do a calculation on here to see what you are at. http://www.reefcentral.com/calc/hlc2.php. No reeflo's on there, but you can use it to find the head loss, then go here:http://www.reeflopumps.com/lowspeedhighflow.html Reeflo's lose flow very quickly if there's any back pressure, so most of the time after fittings, etc, you have 9-10' of head and are already at 1000gph. An easy way to do reduce more flow is to use a Tee and have a ball/gate valve that drains back to the sump. THat will redirect the flow without back pressuring the pump.

I'm fairly certain Reeflo is on there. They're the sequence ones.

[bkelly]

thanks for the help.
I saw J&L has snapper hybrids on . Is that a different pump than a standard snapper.

[mark]

Originally Posted by Lampshade

lots of people do, but do a calculation on here to see what you are at. http://www.reefcentral.com/calc/hlc2.php. No reeflo's on there, but you can use it to find the head loss, then go here:http://www.reeflopumps.com/lowspeedhighflow.html Reeflo's lose flow very quickly if there's any back pressure, so most of the time after fittings, etc, you have 9-10' of head and are already at 1000gph. An easy way to do reduce more flow is to use a Tee and have a ball/gate valve that drains back to the sump. THat will redirect the flow without back pressuring the pump.

sequence 2400seq10 is close

[mark]

Originally Posted by bkelly

thanks for the help.
I saw J&L has snapper hybrids on . Is that a different pump than a standard snapper.

different impeller