Well, on some filters Pentair began replacing true sight glasses with lengths of clear PVC -- but they aren't interchangeable.
If you've got a place to screw-in a sight glass, you'll need a sight glass.
Ben
Re: New Pentair FNS+ 48 D.E. Filter Plumbing (Sightglass??)
Well, on some filters Pentair began replacing true sight glasses with lengths of clear PVC -- but they aren't interchangeable.
If you've got a place to screw-in a sight glass, you'll need a sight glass.
Ben
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