Sir,
My house has roof cistern water, two tanks of 1000 gallons each, above ground, under cover. I have this pump:
http://images.harborfreight.com/manuals/47000-47999/47906.pdf It's a POS, and I'm half-suspecting the pump quality to be the majority of my problems. (yes, I'm sufficiently embarrassed that I bought a harbor freight pump...). It sits between the two tanks, so it's technically below the water line. Home is two story, 1/1, with a propane insta-hot. And
that's why I'm here. Which valve should I use? I've only become more confused browsing the site and forum. I can say, though our water is pure rain, we potentially have issues with algae or slime, although it's never non-potable. I also have particle, carbon, and UV filtration on the system.
Thanks in Advance,
Chris and Mary