Which one did you get? I bought this one. In my studies after I learned we need to choose demand/delivery style pumps and not just a straight diaphragm like as bought.

This gets here Monday.

Pentair SHURflo 8000-543-236 Automatic-Demand Diaphragm Pump, 1.8 GPM With Viton Valves, Santoprene Diaphragm, 50 PSI Demand Switch, 12V, 3/8" NPT Female Port https://www.amazon.com/dp/B00E5UV0W8/ref=cm_sw_r_cp_api_i_RMG5EbVX3TM6Y