Hayward Pool Vac XL Experiences and Questions

Jun 4, 2018
112
Houston, Texas
I bought my Hayward Pool Vac XL a few years ago, but never put it into service because my pool pump's suction side was so weak, it wouldn't power the vac. Well, I finally traced the problem down to the suction side piping sucking air, so I replaced it. Now I've got great suction and it's enough to cause my Pool Vac XL's "feet" to run busily.

Maybe half the time or so, after clearing tiny bits of debris from inside the Pool Vac, when I drop it back into the pool, it will go on its merry way at a pretty good clip. Other times, it doesn't seem to be quite so inclined. And other times I notice that it will be moving along, then it will slow down and pause for a moment, then it will start back up again. Is this latter behavior part of the Pool Vac's "programming," I wonder?

During the years when we were procrastinating about what to do with our pool's suction line, the Pool Vac had just set out on our patio, for the most part, exposed to the elements, which would include about nine months of summer down here in Cairo West. Several times I tossed the Pool Vac into the pool, figuring that's where it belonged and that, even when not in use, that was a better environment for it. But every time, our pool guy would fish it back out. I explained to him my reasoning, but I think it went right over his head (possible language issue) and besides I think that pool guys don't like these things because they replace much of what the pool guy is supposed to do, so . . .

Anyway, this unit has "suffered" through a few summers of being dried out. The internals, what I can see of them, don't appear to be any worse for wear. But the "shoes" are another matter. They are dry and crusty looking. They even have traces of mildew. I don't even recall anymore what they looked like when new. So I'm thinking that, at their current state, they're probably negatively affecting the performance of my Pool Vac, so I've ordered a new set of shoes. Couldn't hurt, I reckon. So, would you agree with my assessment?

One sort of annoying characteristic of this Pool Vac, but I'm thinking that it is one shared by many other designs, is its sensitivity toward small items. We had a bunch of tiny little things in our pool that looked like seeds, about the size of a BB, but the had a hard stem about 3/4" long. These would sometimes clog the turbine. Other times I dunno what it sucked up to stop the turbine. I'd remove the bottom inspection plate, or whatever it's called, to take a look at the vac's innards, but was unable to find anything, and most of the times when I did this, I found that the turbine spun freely. A couple of times the turbine resisted my coaxing for its first couple of revolutions, but then it was fine -- whatever was clogging it had fallen free, I suppose. But most of the time when I find the Pool Vac just sitting on the bottom and not moving, when I pull it out to take a look at it, I can't find anything wrong with its turbine -- even though the feet weren't moving. I suspect that, just the act of turning the unit upside down was enough to dislodge whatever was affecting its operation. So what I've begun to do now is disconnect the suction hose, bring the Pool Vac up out of the water, and give it a good strong shake for a few seconds, then resubmerge it and hook it back up to the suction line. What usually happens is the feet stark kicking away merrily once again. Huh.

I guess there isn't much I can do about this sensitivity to small things, other than keep the pool clean so it doesn't have much to do. What do you folks do, who have suction side vacs?
 
Sometimes you need to pull the turbine wheel completely out in order to clear all the debris. This happens to me a few times a year when a rock/wood chip/etc. gets sucked up and gets jammed. Often, a few shakes is all it takes, but if you don't see it fall out, then there's a good chance that it's still hiding in there and will just get jammed again. It's not too difficult to take out the next layer of the assembly in order to get to the turbine. Just take your time and maybe take pictures to remind you how everything goes back together.

Another possibility is that the some of the internal bearings are shot. It might be that the plastic bearing housings may worn or cracked, which means that they don't transfer the cam action from the turbine wheel to the feet. This is usually more a problem due to wear-and-tear, but it's possible that excessive heat/dryness might also cause problems. Note that the outside of the bearing has a slight bump, about 1/16" square, that needs to be aligned with a groove where the bearing is installed.
 
Hey Peter, thanks for your reply!

Okay, I've tucked away your comment for future reference. Now that the Pool Vac XL has been running for several days -- and has basically vacuumed the pool into a spotless example, now -- I have a better feel for its performance characteristics and capabilities. The new feet should be arriving in the next day or so, but now that I know a bit more, I don't suspect the new ones are going to make much of a difference. I could be wrong, and I will soon see, I guess.

The most important thing about my Pool Vac XL that I've discovered is that it needs good, strong suction in order to run properly. I have a Hayward pump and cartridge filter for my pool. We just recently upgraded the pump motor to 1 hp from 3/4 hp because the old one burned out. I don't know the model of the filter offhand, but the cartridge is about 2 feet tall and 8 inches in diameter. I have been told by a couple of different sources that this pump and filter are too small for our pool. I don't know exactly how large our pool is, but because of its outer dimensions and its depth (10 feet at the deep end), I've been estimating its size at 20,000 gallons. So I dunno, maybe the package is too small for the pool, but it gets the job done.

A point of confusion I have about this: about a month after we moved into this house, the pump and filter suffered a catastrophic failure. This was also a Hayward package -- Hayward pump and motor and a Hayward cartridge filter. The motor burned out and the filter's canister split right down the middle, from top to bottom! The pool repair guy told us that the package was seriously undersized for our pool. And I guess it was -- the old, split filter canister looks wimpy compared to the one we have now, about half its size. But what I'm puzzled about is why he installed a filter that was still too small for our pool size. Maybe he misunderestimated its size when he decided on the replacement package? I don't recall if I told him the pool's size. Heck, back then I probably didn't even have a clue -- being that we'd only lived here for about a month and that this was our first pool.

At any rate, we're stuck with it now. There isn't room in our current budget for upgrading either the pump or the filter or both. Especially since we just replaced the motor. I think that, from a practical standpoint, all it really means is I have to clean the filter a bit more often that I'd have to if it were larger.

Which brings me back to the topic of this thread. I've noticed that my Pool Vac XL is happiest right after I clean the filter. It really zips along the bottom of the pool. And, as pressure across the filter increases (the filter canister has a pressure gauge), performance drops off. In the past, I've tried to make a habit of cleaning the filter once pressure builds up to about 20 psi. But the vac doesn't perform very well at all at this pressure. In fact, it barely creeps along at 20 psi. So I've decided that I should probably get into the habit of cleaning the filter once the pressure hits 15 psi, which it can do rapidly if there's much stuff on the bottom for the vac to pick up, I've found. It still moves along at an acceptable clip at 15 psi, although its less inclined to perform some of its more dramatic activities, such as climbing the wall from the bottom up to the water line from the 10 foot deep end. I'm also thinking that, with the greater suction maintained by having a cleaner filter, this will naturally keep the innards of the vac from building up crud as well. Does this make sense to you? Makes sense to me.

On balance, I really must admit that I'm pleased with this Pool Vac XL's overall performance. I don't know if the pool has ever been as clean as it is right now. And now that it is so clean, I'm beginning to think that I probably should idle the Pool Vac periodically, since there is little point in having it vacuum a surface that's already been cleaned. This will save on wear and tear of the vac unit itself. Which brings to mind another question -- when (if?) you guys idle your pool vacs, do you pull them from the pool, or leave them submerged? If I leave it submerged, I don't have to purge air form the hoses, whereas if I remove it (and the hoses), I'll have to go through the often tedious process of evacuating all the air from the hoses prior to putting it into service. Or is this something I don't need to do? I've always just assumed that I need to eliminate air from the hoses. Or will doing something clever like running a garden hose down the pump's suction inlet be an easier way to get rid of the air? Huh, hadn't thought of that one until just now.
 
Your XL behaves the same as our Navi Pro. Inheriting a pool when you buy a house is certainly interesting.

One pool expert had ours flying right along with wings flapping and I've yet to duplicate that (flapping).

Just changed the filter this AM and the pressure gauge read 5 psi. Wish I had noticed what the soaked filter was reading, but can't report that.

I have come to the conclusion that for our pool, in-ground and under screens, I will be running the suction side about Main Drain 20 percent, Skimmer 40 percent, and 40 percent Vacuum. Mostly we're needing the Skimmer to keep the pollen and other fallout under control.
 
Thanks for the info and perspective, Chuck. I don't have any control over the main drain in this pool. As near as I've been able to determine, it taps into the skimmer's suction piping just under the skimmer box itself. That section is not visible -- it's all encased in concrete -- but there is no other place in the suction line for it to tap into. When we replaced the suction line a couple weeks ago, we replaced the entire line from the skimmer to the pump, and there was no evidence of the main drain tying in anywhere else, so it has to be up there at the skimmer.

The way I'm running the Pool Vac right now is I have the hose shoved down into the skimmer's suction inlet. The downside to this is that anything the XL picks up winds up in the pump basket -- and sometimes in the filter. But we've been keeping the pool floor free of leaves, so things are manageable right now. Our property and neighboring properties have LOTS of trees however, and during the Fall and winter, we get a lot of leaves in the pool. So I think I'm gonna get one of those leaf canisters for the vac before the Fall weather sets in.
 
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