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h.d. does not have 18" x 3x8" o rings. I have taken the o ring up to the pool stores and compared to everything they have in stock including nautilus plus. Even tried installing both of those and they don't fit.

Hi all! Am hoping the tfp forum can help out once again... I have a 36 sf stainless steel DE filter manufactured by Andrews Advantage probably original to the pool build about 21 years ago. No model or serial can be read off the unit. I am in need of a parts list or diagram. Specifically I am...

Thanks folks. Just found out my friend has a ec75a also for his 10000 gallon ig. Previously had the 65 and he likes the 75 better. My pool gets way dirtier so I am going to agree with the recommendations to look at the bigger filter. Appreciate the Input That could be a good deal for...

Actually the pump says hp: 1.5 spl Read somewhere that is a double up and therefore more like 3/4 hp!? Also my current filter is basically a pentair nautilus de 36 sf. 2 inch pipe connections at the equipment and valves but appears to step down to 1 1/2" below grade for supply and 3 return...

Hey TFPers! Hoping you can help us out. I have a 20 y.o. stainless steel DE filter 36 sf on a 13,500 in ground gallon, the filter is working fine, but am considering replacing it as I believe we may be near the end of it's life. Woot has a good deal on a Hayward EC50AC rated for 30,000...

Tried to take out the piston to replace O-rings. Could not get the dang this out no matter. So I'm back to looking at replacing the whole backflush valve and the MPV again... The filter model # wore off the tag. The push-pull valve label is a Pentair 26-1165. Can I put a Pentair 26-1055 MPV...

Mfr is Andrew's Advantage. Probably circa 1994 when pool built. Not sure if there is a model # - dark in there... Thanks

Can I replace a multiport backflush where I have a push/pull on the same filter? I have a 36 SF grid DE filter with the push/pull valve which is currently all jambed up. Would like the vacuum to waste feature possibly. Thanks!

well, i thought i'd share an update with our pool. the pool is looking GOOD! thanks to my fellow TFP people, the BBB method, and some cooler weather, and that drain/fill. The slimy dead algae? debris seemed to be a result of the well fill water, but the chlorine killed it off, and Vaccumed it...

OK- I am convinced to try it with the 65 CYA. Will have to do daily FAS DPD tests but hopefully my FC won't drop off as fast as it might at a lower CYA. After my well fills, the water has been light green, but after running pump for the day, the water mostly cleared all three times , but with...

chem-geek: That's what I was hoping someone would say. Thanks. I think I am starting to get a basic understanding of this new method which has given me new hope! So my third drain/fill last night was a little more aggressive than my first two. I was able to drain about 50% and my CYA...

Cya down to 130 today, ch to 290. Gonna drain again tonight. Looks like ch might get below recommended by the time I get cya in range

Yeah, I would hate to see it ruined too, so I figured I should be able to get cya to 50 in three 18 inch drains. Just finished draining it, put some liq chlorine in and filling again. The green disappeared during the day with filter running. I hope I don't kill the aquifer or my well pump. I...

Water filled back to normal. New tests below. I noticed my sliding backwash valve is not shut all the way and slowly leaking water down the backwash. Won't shut even if I hammer it. I guess I will try to pull out the plunger and see if any O rings are pinching? FC-12 CC-.5 PH 7.5 TA 190 CH...

well, took it down only a foot or so-slightly worried about the possibility of any hydrostatic pressure since I don't know where the water table is here, but in general high in Central FL!? brushed, sprayed with 1 part bleach 1 part water, brushed in, and rinsed a couple of times, filling her up...

Pool party was a success! The rain stopped just in time and kiddos had a blast. I am currently draining. Plan to take it down about 18". Will brushing the exposed sides with concentrate of bleach or acid help kill off any growth that may still be lingering unseen? Any suggestions while I...

Awesome. Pool looking good for the party. Can't wait to get some lower cya and get a tfp!

Ok been keeping fc above 12 as suggested. 4 lbs of ph up actually got ph to 7.5 and has been holding for 36 hours. That is progress for me. However alkalinity is super high. Like 190-220 range! So my question for the party tomorrow, is the fc near 12 safe for swimming? I think ive seen...

Thanks for the continued advice and greetings. My black algae is looking better today. I had brushed it pretty good and hit it with a tri-chlor tab rub last night. TF-100 kit came in the mail today. So tonight I tested it and here are my results with the new kit, water at 82 degrees...

When my FC came down to 4 this morning, the TA read 145. My fills this summer have been just from our summer rains. I have probably also drained out a foot due to the rains, but they are seeming to slow down now for the fall. I assume we are talking about draining two or three feet, a couple...

Thanks for your response Linen. That's what I figured about the chlorine, just wanted to make sure and get off to the right start. So I went to the pool store for more liquid chlorine and have a test done. My suspicions confirmed. Though, my test was done on water drawn during my "blind"...

Greetings. Brand new Forum member here! Kept coming across this site and read over the pool school and am convinced to switch from tri-chlor tablets and weekly liquid "shocks" to the BBB method described here. We're currently working against a black algae bloom and can't keep any FC level...