Why does my pump take longer and longer to prime each week?

[Manikshaw]

The last few weeks I’ve noticed my pump is taking longer to catch prime. It used to grab within 20–30 seconds but now it can take a couple minutes before the water fully fills the basket and starts flowing normally. Nothing major has changed with my setup, so I’m not sure what’s causing the slow priming. Any ideas on what I should check?

 

[Freddie]

The last few weeks I’ve noticed my pump is taking longer to catch prime. It used to grab within 20–30 seconds but now it can take a couple minutes before the water fully fills the basket and starts flowing normally. Nothing major has changed with my setup, so I’m not sure what’s causing the slow priming. Any ideas on what I should check?

Look for a tiny air leak on the suction side. Even a loose union or fitting can cause delayed priming. Mine was caused by a hairline crack in the vacuum port fitting.

 

[Zephyr]

The last few weeks I’ve noticed my pump is taking longer to catch prime. It used to grab within 20–30 seconds but now it can take a couple minutes before the water fully fills the basket and starts flowing normally. Nothing major has changed with my setup, so I’m not sure what’s causing the slow priming. Any ideas on what I should check?

Check your pump lid o-ring. If it’s dry or cracked air sneaks in and makes the pump struggle to prime. A little silicone lube or a new o-ring usually fixes it fast.

 

[syedsam]

The last few weeks I’ve noticed my pump is taking longer to catch prime. It used to grab within 20–30 seconds but now it can take a couple minutes before the water fully fills the basket and starts flowing normally. Nothing major has changed with my setup, so I’m not sure what’s causing the slow priming. Any ideas on what I should check?

If your water level has dropped slightly, the skimmer might be pulling in air before the pump does. It doesn’t have to be super low even a half inch below normal can slow priming.

 

[Ronald Taylor]

Look for a tiny air leak on the suction side. Even a loose union or fitting can cause delayed priming. Mine was caused by a hairline crack in the vacuum port fitting.

 

[Emily Perez]

If it’s taking longer to prime, it’s usually air sneaking in on the suction side. I’d check the simple stuff first: keep the water level above the skimmer, clean and lube or replace the pump lid O-ring, then snug up the unions/fittings and look for any tiny cracks in the lid or connections.