What caused this?

[tarment]

thread407-270902

This was an older thread and I'm not sure if anyone is still being notified of responses but...

Based on the initial information provided on where the supply was located, has anyone entertained the thought of Vortices reaching the impeller? At a 5 foot height above and 4 feet away (suction line size?), this could be a possibility.

 

[BigInch]

Corrosion.

Let your acquaintances be many, but your advisors one in a thousand’ ... Book of Ecclesiasticus

 

[JJPellin]

Corrosion.

Johnny Pellin

 

[Artisi]

Vortices are possible although very unlikely and in any case the concensus is corrosion - probably de-zincification - possibly coupled with some erosion.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[pumpman50]

Looks like a bad case of corrosion/erosion. The pitting could be due to grit of sand in the water. I can't see clearly the normal direction of rotation but the angle of the pitting could suggest reverse rotation. If its drinking water the Ph value should be around 7 but the corrosion suggests something else. Suggest you also check that out.
Andy