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Hi Chuck, For every 2.31ft of tank elevation equals 1psi at the bottom of the discharge pipe. It doesn't matter if the diameter is 1/4" or 25ft as you will still have 1psi for every 2.31ft of rise. The same applys to the rise in your horizontal piping if that was in your system design. Like was stated you won't have a problem with algae if no sun lite gets in the tank or hose, so don't use clear hose. Bacteria on the other hand can develope without sunlite from a source of contamination. That source could come from the well or from the cattle drinking water. The best system and code required, is too seperate the domestic animal water source from the main drinking water supply, usually by a anti-syphion valve. You can use a float valve on the stock tank but make the tank water pipe inlet higher than the tank water level so when the tanks fills the water runs into the tank in free air. The two water sources never touch each other so use a over flow pipe on your stock tank. Here we have coummity wells where there's 500 people using the same water source. When the hauling tank fill hose is disconnected then about a 1/4gal runs out of the well tank supply hose anti-syphion valve thus flusing away any bacteria between users. In 25yrs that I've been here we've never had a bacteria problem. However, I still chlorinate my water tank and piping system twice a year, once in the spring and once in the fall. By law, We now are required to chlorinate the well storage tanks each month. You can also use a 12v SurFlo RV water pump, 5gpm at 45psi, about $50 at Camping World, for a pressure pump to your house/RV. Add a solar PV with a charge controller, about $200, too keep the battery charged. Beats a gererator all to heck as it's very quite and will last several years. T_Bone
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