Plumbing sizes and drainage

[spit.fire]

Originally Posted by gregzz4

Thanks for the thoughts and links everyone

It has to be the 1" drain plumbing

The emerg kicks in if I crank it up, so it's not the teeth

I'll change it to 1-1/2"

where in the pipe is your valve? the lower the valve the better your flow will be initially as anything below the valve wont act as a siphon until the bubbles are all cleared out

[gregzz4]

The bubbles clear out within less than 1 minute, but to answer your question, the valve is inline within 12" of the bulkhead
And the valve is wide open

I can leave the pump running fulltime for weeks on end and nothing changes, so it's def not trapped air. And I don't have to dial it in after a restart

[apexifd]

Originally Posted by gregzz4

The bubbles clear out within less than 1 minute, but to answer your question, the valve is inline within 12" of the bulkhead
And the valve is wide open

I can leave the pump running fulltime for weeks on end and nothing changes, so it's def not trapped air. And I don't have to dial it in after a restart

Mine get 1" drop from bottom of the bulk head, connected to a 90 then gate valve, 2' then another 90 and into the sump. No more than 10" drop from bottom of the tank and around 3' of 1" PVC in total.

I don't get much drainage issue, emergency is only trickle when the filter sock is full.

I run Speedwave 2640 at max speed, and set up as Herbie.