I am using a small flojet pump - on the specs it says that max pressure is 50psi, which is the same max pressure as the small general ecology filter cartridge that I have used as an inline filter for potable water - works well. I used snap in male and female airline fittings (brass) so that I can use either a shower head or my drinking water attachment. By using ball valves it is possible to fill and discharge from the tank or an external source (e.g. if showering).
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