Pentair Quad DE Filter - O-ring lube or no?

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J

JMPool99

Bronze Supporter
Jul 31, 2021
120
So Cal
Pool Size
22000
Surface
Plaster
Chlorine
Liquid Chlorine
Previously I had a pool guy handling my filter changes. I'm now taking this over too since I'm a TFP guy now! ANYWAY, my pool guy didn't lube the O-ring on my filter. No issues so far. I've seen a number of post on the forums here that seem to have varying opinions on this subject: Lube or not lube the filter o-ring?

The Pentair manual says "Do not use petroleum base lubricants to avoid damage to the gasket." OK, but what about OTHER non-petroleum based lubes?

I've also read that some folks says just replace the o-ring every couple years when it wears out (I would be ok with that too).

Thoughts?

Thanks!
 
Awesome -- thanks. Will grab some Magic Lube II!

Newbie qustion... You think the 1oz bottle is enough? I only change my filter every 6 mos or so.
 
Since you guys have been so helpful... one more question... I have a Pentair Quad DE 100 filter. I don't see any valves to isolate the filter. It's at about or a little below waterline height. What's the best way to prevent water from draining. Or, because I have check valves, am I ok?
 
Check valves would not help for flow on the suction side. No valves before the pump?
 
FYI - I pretty much have the same exact equinment as @JoyfulNoise :) Anyway, I do have the plunger for the backwash.
I don't see any valves before the filter that would be shutoffs. Here are some photos I took earlier (attached).
 

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No. Need to see the suction side to the pump. There is nearly always a valve in front of the pump.
 
Will take some more photos tonight. Below I marked arrows on the pipe going to to the filter pump inlet. I don't see any valves ahead of it though. Hmm...
 

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OK - a few more photos. Thanks again -- once I have this down I'll be good to go. (ignore that floater - that's from my old pool guy, I'm all liquid now : -) )
 

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To stop water flow from the pool to the pump on the suction side you will need to remove the actuator from the valve, put the handle back on the valve, and point the off towards the pump intake.
 
Got it. I don't think my pool guy did that last time and I know no water was rushing in -- intersting.

@JoyfulNoise was mentioning something about the backwashing plunger... is there a shortcut to using that? ;-)
 
No. I thought you might have a multiport valve. You need to block off the intake to the pump as Marty says.

How far below water level is the equipment?
 

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