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I am new to this forum. How do I submit a sketch? Re cooling the motors, I will specify a pipe sleeve attached to the pump body above the motor, open at the bottom, which will force the flow past the motor. I have used these in the past in booster pump applications with good results.

My client wants to replace a pair of vertical turbine pumps with submersible turbine pumps to reduce noise complaints from nearby residents. The vertical turbines are installed in cans connected to the nearby lake, which varies in level. With a submersible, the intake will be higher than the...

Thanks to all for your responses. I am going to install a nylon bushing between the copper and the stainless, so there will not be any direct contact.

I dont know the conductivity but the water is quite hard. My guess is that the TDS is high for potable water, probably over 600 ppm.

Will direct connection of Type L or K copper pipe to 316 sst underwater present a corrosion problem?

I have direct experience with about 20 municipal iron and manganese systems that utilize either silica sand, or manganese greensand, plus antracite. All have worked well, for up to 25 years so far. One of the older plants using greensand was recently replaced with a pyrolusite system, which...