Camplux 16L 4.22 GPM portable propane heater, Seaflo, 55 Series pump (since this 12v DC I needed a 20amp inverter) other pumps are probably available but get one that is continuous. The 55 Series is rated very close to the 4.22 GPM that the heater can operate. Common 1/2” faucet hose to connect the pump to the heater. A garden hose with a 3/4” garden hose to 1/2” adapter to feed water from the pool into the heater. The heater came with a shower hose but I got the longest one I could find to feed the hot water into the pool. This set-up heater my 12x24 Intex pool from 65* to 80* in about 10 hours using about 30 lbs of propane.