To get started, just choose a category below and choose a heater from any of its subcategories. Standard immersion heaters are built to order and ship in 5 to 15 business days, depending on the style. Most ship within 10 days, and some flange and screwplug immersion heaters can ship in as little as 2 days. If you need a faster lead time than standard, please contact us, and we will find out whether it's currently Immersion Heaters McMaster-CarrScrew-Plug ImmersionHeaters for Chemical Solutions. Install these heaters into threaded container openings or pipe couplings to quickly and efficiently heat liquid through direct contact. The heating element is Incoloy for excellent resistance to harsh chemicals.