What pressure for water pump?
 

I want to install a 12v waterpump for our water system, but not sure what specs I should be looking for. 10 l/min flow rate will be more than enough. Won't be using it for a shower, just from the watertank. The only thing I'm not sure about is what pressure it should be. I have this katadyn filter (Zu bestellen bei Daerr.de: Katadyn Ersatz- Filterelement Keramik "Offroad" / "Nr. 4" (Katadyn)) with this housing (Zu bestellen bei Daerr.de: Katadyn Einbau Filter Gehäuse OHNE FILTERELEMENT !!!!! (Katadyn)) which is going in as well. I was thinking a 20psi will be good enough, but not sure.:confused1:

Oh yes, I thought one of these will be up to the job.

Shurflo Low Pressure Water Pump -7LPM 20PSi 12V

or

Shurflo Trail King 12v Water Pump

Any advice appreciated...

Thanks

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).