https://smile.amazon.com/dp/B07L8ZJNYT/ref=cm_sw_r_cp_api_glt_fabc_X8H5DANZ55KFHWJRWXG4?_encoding=UTF8&psc=1 Put whichever of these funnels fits in your kettle & place the cylinder and piston head into the funnel. Once the kettle water is boiling the cylinder will heat precipitously. Best & easiest method I’ve used.