The Flojet Duplex series pumps are 12v DC and suitable for continuous duty as a medium volume water supply or nutrient and some chemical spraying pump. The D3131-H5011 has a built in pressure switch with a cut-out pressure of 420 kPa (60 psi) and comes with Santoprene diaphragms and EPDM check valves. This particular model has a maximum flow of 6.1 L/minute and is suitable for use with some chemicals, nutrients, sea water and fresh water. Chemical resistant materials (see chart for details - click here). Particularly suitable for water and natural nutrient pumping or spraying. Click here to download the pdf spec sheet.
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The advice and service I got from these guys was awesome.
The pump works beautifully off the batts in my boat for pumping water up 10m.
It is barely warm after 40mins running and is forgiving on high head pressure.
The fruit tingles were a nice touch too.
My only note is when given links to multiple items, ensure you don't just pick the top of the page - but that is my bad.