Indirect Water Heater ,   Model: HL Additional Information The HotLine Storage Tank works in conjunction with a gas or oil-fired boiler to supply residential and commercial hot water needs more efficiently. HotLine tanks deliver 3 to 5 times more domestic hot water than electric or gas-fired water heaters. Capacity: 30 - 40 - 50 - 80 - 119 Gal. Brochure 240004872 - HL Series Rev. 8/10 492.9 kb Installation & Operation Manual 240004873 - HL Rev. 1.0 448.4 kb Product Bulletin Hotline Packaging Product Bulletin 7/1/08 38.1 kb Service Bulletin HL Rev. 6/06 289.8 kb Warranty 240004877 - HL Rev. 5/06 41.8 kb