07-12-2019, 07:10 AM
Hi Fred, how long is it sitting before you get varying results? Depending how the hoses are sitting you could be losing the prime, do you see some empty tube below the pump? When you setup the pumps it's best to have them like the image you attached, this way the prime can't be lost as easy.
Those other pumps you linked will work to.
Those other pumps you linked will work to.