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Note: ProMax name is now ProLine.

The ProLine® Standard Electric water heater is the reliable choice when you are looking to maximize your hot water output and is designed with environmentally-friendly insulation to reduce standby heat loss.

With a 40-gallon tank delivering 4,500 watts, the ENT-40 delivers a first hour rating of 50 gallons at an Energy Factor of 0.95. The Coregard™ sacrificial anode helps protect the tank from the corrosive effects of water, and is accompanied by a 6-year limited tank warranty..

With a 50-gallon tank delivering 4,500 watts, the ENT-50 delivers a first hour rating of 69 gallons at an Energy Factor of 0.95. The Coregard™ sacrificial anode helps protect the tank from the corrosive effects of water, and is accompanied by a 6-year limited tank warranty.

Enhanced Heating Elements:
  • Dual 4500 watt elements for fast recovery and reliable operation.
  • Incoloy stainless steel lower element lasts longer than a standard copper element.

Dynaclean Diffuser Dip Tube
  • Helps reduce lime and sediment buildup and maximizes hot water output. Made from longlasting PEX cross-linked polymer.

High Energy Factors
  • Eco-friendly non-CFC foam insulation, heat traps and other features combine to yield a higher Energy Factor that maximizes savings on operating costs.

Coregard Anode Rod
  • Our anode rods have a stainless steel core that extends the life of the anode rod allowing superior tank protection far longer than standard anode rods.

Blue Diamond Glass Coating
  • Provides superior corrosion resistance compared to industry standard glass lining.

Enhanced Flow Brass Drain Valve
  • Our residential water heaters have a solid brass, tamper resistant, enhanced flow, ball type, drain valve.
  • Uses a standard female hose fitting that allows for fast and easy draining during maintenance.
  • Designed for easy operation, this valve includes an integral screwdriver slot that features a 1/4 turn (open/close) radius, which not only permits full straight-through water flow but also a quick and positive shut off.

Code Compliance
  • Meets UBC, CEC and HUD National Codes.
  • Meets the thermal efficiency and standby loss requirements of the U.S. Department of Energy and current edition of ASHRAE/IESNA 90.1.
  • Complies with the Federal Energy Conservation Standards effective April 16, 2015, in accordance with the Energy Policy and Conservation Act (EPCA), as amended.

Approved for Manufactured Housing
  • All residential electric water heaters are compliant with HUD Standards for mobile homes/manufactured housing.

6 Year Limited Tank and Parts Warranty
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Intended Household:
3-4 Person
Capacity (Gallons):
Fuel Type:
Max Input (KW):
Diameter (Inches):
Height (Inches):
1st Hour Delivery (Gallons):
Energy Factor:
Recovery 90°F Rise:
21 GPH
Weight (lbs):
125 lbs
6 yr Tank/6 yr Parts Limited
Energy Star Rated:
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