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Stenner confirmed their part EC30C-x as the correct one for my Pentair tank-mounted acid pump, and the one that works with the Pentair pH controller. The suffix letter C indicates the OD, ID, Santoprene material, and psi capability expected by the Pentair pH controller, so parts with other...

On my current house and pool, I use a SWG. But I found I'll need to set up a pump again for winter when water is below 50F and the SWG doesn't work. I don't heat the pool in winter, so need this from December to March. On my previous pool, I used a Stenner 45 fixed-output for chlorine with...

Still communicating with Pentair Tech Support, who is insisting the Stenner #2 tube is correct even though it is 2" too long ("Did you try installing the tube regardless of the size difference to see if it works?" OMG). The Pentair 522378 Repair Kit includes the correct, but unmarked, tube...

Doing a probably dangerous solution. I fill a 50ml syringe with 29% muratic acid, and dive down to each spot and dispense a little acid. This has completely removed most of the spots with one treatment. The couple that recurred needed multiple shots. Last treatment about a month ago, and all...

Have a Pentair IntelliChem installed March 2020, part 522621, that includes the tank-mounted peristaltic pump -- the "Blue" pump. Documentation shows the peristaltic tubing is Pentair 522480 (which was also labeled Stenner UCCP202 #2 Pump Tube). But this tube is 6.25" between the black...

Turns out more than one problem. The bubbles were interfering with the probe, but another problem too: EasyTouch8 programmed incorrectly. When in Cleaner mode, the unit was programmed with the F (filter pump) relay off. Pump is still running high speed, but the IntelliChem needs F active as...

My pool is pebble finish, but not PebbleTec. Half-dozen or so rust spots as described in this thread began four months after plaster completed 30 Jan 2020. Contractor initially claimed I dropped something in the pool (in spite of several spots on the pool wall!). He poured pool acid thru a...

There is actually a menu item on the IntelliChem for pH to Tweak. So you go to the menu item and adjust, limited by 0.2 pH units.

Have seen comments on TFP regarding ORP inaccuracy for IntelliChem. Have IC40 cell, and noticed no chlorine generation when pump on higher speed. Issue (repaired today) was leaking valve on suction side, causing air bubbles at ORP / pH sensing cell! Will continue to track, but seems to have...

Anyone have experience using an EasyTouch controlled outlet to program acid addition with a Stenner pump? Remodeling a pool (not the pool in my signature -- I'm moving), and will have an EasyTouch8 there, plus a SWG for sanitizer. Would like a daily addition of acid, but I'll need to...

The paper on stainless steel corrosion did not discuss CYA, only chlorine. I realize I'm dangerously close to an algae bloom even with 25ppm FC when I have outrageously high CYA. Hoping the pool remodel starts in a few weeks, and we can dodge that bullet. The corrosion reference was from...

We have a spa/pool combo. The time to heat the spa depends on your heater BTU rating and the spa size. With our 400k BTU natural gas heater, the 700-gallon spa heats about a degree per minute.

In case this thread is viewed later by others, first do not clean the rust using a steel-bristled brush! Or steel wool, or similar. That apparently leaves iron smears and makes future corrosion worse. Second, found that 316 stainless can tolerate (only) up to 5ppm chlorine, so...

The chemistry was horrible. Previous owner used trichlor exclusively with two floaters in 13,000 gallon pool. I measured about 250ppm CYA (with a 4x dilution to get in range), FC around 25ppm (again, 4x dilution), pH 7.3, Alkalinity 90ppm, CH 575ppm. Refill water is 220ppm CH. But, I'm going...

Is it typical for the Pentair Clean & Clear Plus to corrode excessively? Just bought a house with existing equipment. The filter is dated 2014, and while cleaning today noticed lots of iron stain inside the filter housing, coming from the steel band around the inside. Thought this was...

Found a pump head calculator from Pentair, Pump Calculator. Using 7psi drop when my CCP420 filter receives 120GPM, maybe 50 foot of 2" piping and some elbows, I get 40 feet head. At that head, IntelliFlow 2 pump at 3110RPM can produce 125GPM. So looks like a manual bypass is unnecessary. I...

Thanks JimBethesda! I found your reference in the MasterTemp manual. The pump is a Pentair Intelliflow 2, so from the pump curves I could get 150GPM if the pump is at maximum speed, 3450RPM. On my original home the maximum speed I use is 3050RPM. Don't know how much head loss to attribute to...

Just bought a house with pool needing work (not the one in my signature). A pool contractor told me the Pentair MasterTemp 400k BTU has a maximum allowed flow rate, so I need to add a diverter valve ahead of it. This seems wildly untrue, but anyone doing something like this? Will be replacing...

mguzzy, excellent point on draining the pool. I'll have to once because the pool needs some plaster work (and uses trichlor now with likely high cyanuric acid), but thereafter there should be no reason. Thanks!

Getting a new home, and want to switch to SWG when I upgrade the pool. First, do you really have to run the pump 24 hours/day for SWG? And second, this home has a septic. Where do you drain a salt pool? Finally, thoughts on using potassium chloride for the salt?

Is the TA level only important as a buffer to keep pH stable? If that is true, then if you have a stable / manageable pH the TA would seem irrelevant. Assuming a southwestern, plaster pool where your municipal water is pH 8.

Skipped the TA section on acid addition, and that was the problem -- Thanks! And good to remind me of the CYA to FC relationship. My FC actually has stayed above 2ppm which is consistent with 30ppm CYA, but I incorrectly thought 1ppm would have been OK. And on my muriatic acid container it...

I must not be using Pool Math correctly. Just entered the pH 8.2 measured today, target pH 7.4, and it said to add 2.7oz of 29% muriatic acid. I added 24oz, and will probably see a pH 7.8 tomorrow morning. Pool volume looks correct at 10,000 gallons. Are there other settings (that I must have...

Have needed to add about 2 cups / day muriatic acid to approach pH goal of 7.5. Fill water is pH 8.0, and using a peristaltic pump dispensing 24oz/day 10% bleach. The 2C acid is about 8 times what Pool Math says, so makes me wonder what I'm doing wrong. My pH measurement tool is an Apera...

Surprised that 7 ounces muriatic acid would move the pH much. Maybe something wrong in my pool, but I'd need 16 ounces for my 10k-gallon, plaster pool (very different from what Pool Math recommends). Fill water here in Vegas is pH 8.1. Using a pH meter to measure.

Do you mean the tubing inside the Stenner head, that gets compressed by the rollers? That stuff is special, a highly flexible and chemically inert material. The "official" stuff is called Santoprene, a type of silicone I think, and is sized to match the head, and includes compression fittings...

Moved to Vegas three years ago and have a 10,000 gallon plaster pool. Never had a pool before. Just switched from a pool service because I felt I could do better and avoid the strong chlorine smell. CYA was over 400. Draining the pool to start over, and will follow TFP using an initial 30ppm...