Re: Clogged suction line.
What a coincidence! I was just about to post a question about a clogged suction too. Mine is my main drain at the bottom. I noticed that the drains weren't sucking up the grit (dust storm we had Saturday), so I cycled the valve for the drain to the off position. Great groans from the pump and the filter basket suddenly was half air. Pressure on the cart filter dropped 10 psi. I put it back to the skimmers.
I have taken my valve apart before, apparently it was assembed with the O ring not seated correctly, so it was sucked in a little, causing a suction side air leak. get some silicon O ring lub (mine's something like "Pool and Spa" from Leslies. I was at Leslies Yesterday and noticed they had this bladder-like thing that attaches to the end of a garden hose. I imaging you could place that in the intake to you pump's filter basket (it's just a pipe on mine) and back-flush without removing any value covers. [Or use a towel as noted on preview]
I will probably wait this out until the pool is warmer, then dive down and remove the drain covers (with drain valve in the off position), and see if anything is there. I found some river-stone smooth bits of plaster in the pump basket a couple weeks ago, so I figure there's more and I need to get them out of the line anyway. I will also try the backwash, with a pressure gauge tee'd in to prevent over-pressuring my drain lines (no more that 20 psi?).
47,000 Gal. Gunite, Irregular geometric shape with elevated spa
Emerald Plaster!
1 Aqua Logic PS8 w/SWCG
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Hayward Swimclear C5025 Cartridge Filter
1 Swimmin' Lab, natch
1 Swimmin' Boston Terrier
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