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Same piece of copper , from the same stick for the 2nd go around? No sir used a new stick of 2 1/2 specifically to rule that out
She never made it past the bedroom door, what was she aiming for...?
She's gone shootin..
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Suction side of pump or discharge ? Chlorine and Copper usually not a good combo in most Water treatment feed lines I have been around most were Schedule 80 PVC with glues that rated for chlorine. Looks like cavitaion to me the 90 is not helping. Just a guess. If its disharge on the pump any air bleeds installed? Discharge side of pump. And yes the 90 is close but again the location and specific nature of the pitting is what’s curious. I have seen the harsh effect of oversized circ pumps on copper systems many times at my sites and this just doesn’t match up
She never made it past the bedroom door, what was she aiming for...?
She's gone shootin..
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Was the 90 ell replaced both times or not all all? You reaming all cuts?
Any chance a gob of solder or a burr from the cut was left behind?
That's erosion from some source that close to the ell.
If it was electrolysis or chemical, It would be appearing in other areas also. Kenneth all fittings and pipe were replaced. Reamed proper and no chance of a burr as I’m anal x10 about fitting/pipe prep... I’m sure you understand that I’ll check for a gob of solder but man I’m pretty careful about that as well.. I agree that the easy answer is electrolysis or chemical but it just doesn’t add up to me... Some harsh and very localized turbulence seems most likely to me but I’m reaching for the why and how
She never made it past the bedroom door, what was she aiming for...?
She's gone shootin..
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As others have said, electrolysis is what I would say your problem is. I would be looking to see if there is stray current on the piping by putting a volt meter on it to ground and see what you got. I would also put dielectric gasket kits on the pump flanges if the pump is cast iron.
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HC..I’m on board with what you’re saying, but I just don’t know how to do it..
Can you walk me thru (plumber) specifically how I would check
These things with my meter
“go across the piping on both sides of the pump with impedance” .....mostly this part
Thanks Checking for continuity across the pump piping and check for voltage while you're at it.
I would not buy something that runs on any kind of primer given the possibility of primer shortages and even regulations. In fact, why not buy a flintlock? Really. Rocks aren't going away anytime soon.
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I suspect there is at least a contributing issue with the volute/impeller being imperfect and causing cavitation and flow issues...
I was told the pump seal had failed a while back (less than a year old) and the impeller was in bad shape and replaced as well at that time. I heard the impeller housing was not in great shape and getting the new impeller in was “tricky”.
Obviously that’s not good..
If both units are cloned, swap the pumps and see if your issue transfers to the other boiler.
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Was it determined what caused the failed seal, and impeller and housing to be in bad shape?
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Some years ago I was involved in the construction of two community swimming pools. When the swimming park opened one of the pools was slowly corroding the pool ladders, fixtures, and plumbing and swimmers would report a tingling sensation when entering and exiting the pool. Inspectors closed the pool and spent tons of money trying to pinpoint the problem.
Turns out it was a defective underwater pool light electrifying the entire system.
Not saying this is the cause of your issue but something to consider.
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Was it determined what caused the failed seal, and impeller and housing to be in bad shape? It was replaced by the company under warranty and cause was not specifically determined I believe today we’re going to take the whole assembly apart and have a look
She never made it past the bedroom door, what was she aiming for...?
She's gone shootin..
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Some years ago I was involved in the construction of two community swimming pools. When the swimming park opened one of the pools was slowly corroding the pool ladders, fixtures, and plumbing and swimmers would report a tingling sensation when entering and exiting the pool. Inspectors closed the pool and spent tons of money trying to pinpoint the problem.
Turns out it was a defective underwater pool light electrifying the entire system.
Not saying this is the cause of your issue but something to consider. Morewood thanks for that and yes it’s definitely something to consider. Interesting possibility but I’m not sure how I could even begin to check that within the parameters we operate in around here
She never made it past the bedroom door, what was she aiming for...?
She's gone shootin..
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Volute looks great ![[Linked Image from i.postimg.cc]](https://i.postimg.cc/nLfT6Qf1/4-BB96880-88-E7-4-CEC-B3-BC-838-D54540-D6-B.jpg)
She never made it past the bedroom door, what was she aiming for...?
She's gone shootin..
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Intake side of impeller is destroyed ![[Linked Image from i.postimg.cc]](https://i.postimg.cc/fbkXqzJv/C1-DA172-C-1-D97-4-DA3-BCC2-FB628201-A3-F9.jpg)
She never made it past the bedroom door, what was she aiming for...?
She's gone shootin..
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Wonderful. Now, where do the impeller pieces now reside?
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Stainless impeller on other boiler pump is in much better shape at approx 18 months old ![[Linked Image from i.postimg.cc]](https://i.postimg.cc/vHg5vHxL/E8694-EEF-0833-44-A4-93-BE-7-D6-E9668-DEF6.jpg)
She never made it past the bedroom door, what was she aiming for...?
She's gone shootin..
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Wonderful. Now, where do the impeller pieces now reside? They’re at every plumbers favorite spot... Just pushed a little further down the line 😂
She never made it past the bedroom door, what was she aiming for...?
She's gone shootin..
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If the last repair was warranteed, it might be time to exercise it.
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Intake side of impeller is destroyed Is this impeller #2? Today's inspection? If so, the 3 way valve up line is in a perfect position to starve or cause the pump to cavitate. I'd take a hard look at it. Proper installation, &/or faulty?
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If this is mechanical damage, it could be caused by incorrect impeller to casing clearance. You did mention that the pump went together with difficulty.
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Cert,
Been heating with boilers all my life. Had to change the volute on my B&G this winter, surprised to see made in China,
Couple thoughts
* bad piece of copper
* stray voltage
* pool water reacting with metals. May have to put in a water exchanger , like salt water boats .
* kids pissing in pool.
Good luck,
Best,
Chuck
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Can you use two 45’s instead of the 90. All of our pool boilers are piped with Sched 80 CPVC. Copper isn’t good with pool chemicals.
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