Hayward Pump questions

[Poconos]

Hi Ron,
The pressure gauge will tell if you're taxing the pump. What kind of pressures do you normally run? 15 years? Part of me says if it lasted this long then it's good for another 15. Joking. Really depends on what is causing the noise. One or both of two things. Water pressure seal or bearings. The fact it is at times quiet still doesn't point to one or the other.
If you do replace it and that size has been working fine then stick with the same and save electricity. As for the solar 25' in the air, once it is filled with water it may as well be laying flat on the ground. Takes a little more poop to get the water up there but once filled, gravity helps on the downside.
Tell us the pressure and that may change our thoughts.
Al

[rhosk]

Wow, fast responses here

Pressure runs at about 16-17 PSI without the panels and 18-19 PSI with the panels. When I port the panels, I do have to restrict the flow on the output a tad (I use washers inside the outlet jets to do this) to add more pressure to purge air (I assume at the top of the panels). But this is what sends it from 18 to 19 PSI. I have a ball valve; I just haven't installed it yet.

Not a significant difference as you can see. And I can get the 1 HP pump for the same price as the 3/4 HP at Amazon (The 1 HP being free shipping), so I figured I might as well get the 1 HP - only if it would help. I'd like to save electricity too!

What do you think?

[mas985]

I wouldn't go any higher than a 3/4 HP. In fact, I am running a 1/2 HP (full rate) pump with solar and a 25' roof without any problem. The panels prime fine in less than about a minuite.

Also, I am surprised you need to restrict the returns at all. You shouldn't need to do that with only a 25' rise. Again, I am able to prime my panels with about 15 PSI. Have you tried it without the restriction?

[rhosk]

I wouldn't go any higher than a 3/4 HP. In fact, I am running a 1/2 HP (full rate) pump with solar and a 25' roof without any problem. The panels prime fine in less than about a minuite.

You've convinced me, thanks.

Also, I am surprised you need to restrict the returns at all. You shouldn't need to do that with only a 25' rise. Again, I am able to prime my panels with about 15 PSI. Have you tried it without the restriction?

If I run it without the restriction, it bubble-burps every several seconds or so. Not a major problem, but it does cease when I restrict it

Regarding the electrical... has anyone purchased a new pump recently? Will I just be able to remove my current cord and install/wire it on the new pump? Or have things changed in that arena?

[mas985]

Do you currently have the SP2605X7 pump (uprated 3/4 HP)? If so, that pump actually has a lower head curve than my 1/2 HP pump which might explain why you have having some trouble with priming. What is the filter pressure when you don't have the extra restriction?

[rhosk]

Hi Mark,

No trouble with priming, just the air. The pump model number is SP1605 Z1...

Without the washers in the outlets, I get about 17 PSI or so. It's not much of a difference at all with/without restriction, but it does get rid of the air when I increase the pressure slightly.

[waste]

Ron, I'll gladly leave pump size and flow issues to experts like Mark and Al (if I know a little about what they're talking about, it's only from reading their threads )

However, it's easy, usually, to see if the shaft seal has failed, all you need do is look for a drip at the motor/ housing interface when the pump is running (a puddle coming from under said interface is a good indication as well)

Good luck with keeping the motor running another 15 years.

[mas985]

Hi Mark,

No trouble with priming, just the air. The pump model number is SP1605 Z1...

Without the washers in the outlets, I get about 17 PSI or so. It's not much of a difference at all with/without restriction, but it does get rid of the air when I increase the pressure slightly.

That is actually the motor number but it is the motor for the SP2605X7 model pump which is a 3/4 HP uprated pump. The SP2607x10, an uprated 1 HP, is actaully closer to the 1/2 HP pump that I have in terms of performance (not all pumps are created equal).

What may be happening is that the pressure at the vacuum release is not high enough to completely close off thereby allowing air into the panels. So the panels go through a cycle of air and purge which is why you see bubbles come out periodically. So the issue could be with the valve itself.

However, 17 PSI should be more than enough pressure to close the VRV and prime the panels unless there is a lot of head loss between the filter and VRV. What size pipe do you have going to the panels? Where is the VRV located? Sometimes you can move the valve to the supply side of the panels so it closes off easier.