Tankless Water Heaters | McMaster-Carr

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30 Products

Selecting an Immersion Heater

Point-of-Use Water Heaters

Also called tankless water heaters, these provide hot water on demand and take up less space than heaters with a tank. They are easier to install than gas tank heaters and don’t require a relief valve. All turn on when water flows through the heater and turn off when the flow stops.

Estimated yearly energy cost is based on electricity cost of $0.12 per kWh. For more information, visit www.ftc.gov/energy.

Heaters with an adjustable thermostat let you set the exact water temperature you need. Screws are inside the enclosure to prevent accidental movement.

Heaters without temperature control do not provide precise control. The temperature of the water coming out depends on the temperature of the water going in.

Heater for four faucets can be used with circular multistation wash fountains or a single shower.

Adjustable Thermostat with Digital Keypad—3/8" OD Bottom Compression Tube Connection

240V AC, Single Phase
Water Temp. Rise	For No. of Faucets	Wattage, W	Current, A	Max. Water Temp., °F	For Water Pressure Range, psi	Flow Rate, gpm	Ht.	Wd.	Dp.		Each
102° F @ 0.5 gpm 26° F @ 2 gpm 34° F @ 1.5 gpm 51° F @ 1 gpm	1	7,500	32	140°	30 to 150	0.2 to 2.5	10 3/4"	5 1/4"	3"	00000000	0000000
130° F @ 0.5 gpm 32° F @ 2 gpm 43° F @ 1.5 gpm 65° F @ 1 gpm	1	9,500	40	140°	30 to 150	0.2 to 2.5	10 3/4"	5 1/4"	3"	00000000	000000

Adjustable Thermostat with Screw—3/4 NPT Male Bottom Pipe Connection

240V AC, Single Phase
Water Temp. Rise	For No. of Faucets	Wattage, W	Current, A	Max. Water Temp., °F	For Water Pressure Range, psi	Flow Rate, gpm	Ht.	Wd.	Dp.		Each
32° F @ 4 gpm 43° F @ 3 gpm 52° F @ 2.5 gpm 65° F @ 2 gpm	1	19,000	80	180°	40 to 150	1.5 to 4	10"	10 1/2"	3"	00000000	0000000
43° F @ 3 gpm 52° F @ 2.5 gpm 65° F @ 2 gpm 87° F @ 1.5 gpm	4	19,000	80	110°	40 to 150	0.7 to 3	10"	10 1/2"	3"	00000000	000000

Without Temperature Control—3/8" OD Bottom Compression Tube Connection

Water Heaters													Replacement Heating Elements
Water Temp. Rise	For No. of Faucets	Wattage, W	Current, A	Estimated Yearly Energy Cost	Max. Water Temp., °F	For Water Pressure Range, psi	Flow Rate, gpm	Ht.	Wd.	Dp.		Each		Each
120V AC, Single Phase
41° F @ 0.5 gpm	1	3,000	25	$74 @ 0.2 gpm	150°	30 to 150	0.3	10 1/2"	5 1/4"	3"	0000000	0000000	000000	000000
208V AC, Single Phase
56° F @ 0.5 gpm	1	4,100	20	$74 @ 0.4 gpm	150°	30 to 150	0.4	10 1/2"	5 1/4"	3"	0000000	000000	000000	00000
240V AC, Single Phase
43° F @ 1.5 gpm 65° F @ 1 gpm	1	9,500	40	$74 @ 0.8 gpm	150°	30 to 150	0.8	10 1/2"	5 1/4"	3"	0000000	000000	0000000	00000
48° F @ 0.5 gpm	1	3,500	15	$74 @ 0.3 gpm	150°	30 to 150	0.3	10 1/2"	5 1/4"	3"	0000000	000000	000000	00000
75° F @ 0.5 gpm	1	5,500	23	$74 @ 0.5 gpm	150°	30 to 150	0.5	10 1/2"	5 1/4"	3"	0000000	000000	000000	00000
277V AC, Single Phase
56° F @ 0.5 gpm	1	4,100	15	$74 @ 0.3 gpm	150°	30 to 150	0.4	10 1/2"	5 1/4"	3"	0000000	000000	0000000	00000

Flow-Through Heaters for Water

With Temperature-Control Screw

With Temperature-Control Dial

Also known as circulation heaters, these install directly into pipelines to quickly and efficiently heat liquid through direct contact. An adjustable thermostat automatically turns the heater on when the temperature drops below the set temperature and off when it rises above the set temperature. Adjust the set temperature with the screw or dial.

Incoloy heating elements are more corrosion resistant than copper heating elements.

			Heating Element			Temp. Control
Wattage, W	Watt Density, W/sq. in.	Current, A	Lg.	Wd.	No. of	Method	Range, °F	Pipe Size	Thread Type	Gender	Wire Connection Type		Each
Copper Heating Element with Bronze Body
120V AC, Single Phase
1,500	34	12.5	11 1/4"	4"	1	Screw	60° to 180°	1	NPT	Female	Screw Terminals	0000000	000000000
2,000	47	16.7	11 3/4"	4"	1	Screw	60° to 180°	1	NPT	Female	Screw Terminals	0000000	00000000
240V AC, Single Phase
3,000	51	12.5	16"	4"	1	Screw	60° to 180°	1	NPT	Female	Screw Terminals	0000000	00000000
Incoloy Heating Element with Aluminum Body
480V AC, Three Phase
6,000	50	7.3	28 13/16"	5 5/8"	3	Dial	60° to 250°	1	NPT	Male	Wire Leads	000000000	00000000
12,000	50	14.5	39 9/16"	5 5/8"	3	Dial	60° to 250°	1	NPT	Male	Wire Leads	000000000	00000000
18,000	50	21.7	51 5/16"	5 5/8"	3	Dial	60° to 250°	1	NPT	Male	Wire Leads	000000000	00000000
24,000	50	29	37 5/16"	8"	6	Dial	60° to 250°	2	NPT	Male	Wire Leads	000000000	00000000
40,000	50	48	55 3/4"	8"	6	Dial	60° to 250°	2	NPT	Male	Wire Leads	000000000	00000000

Flow-Through Heaters for Chemical Solutions

5-15

Also known as circulation heaters, these install directly into pipelines to quickly and efficiently heat liquid through direct contact. All are designed to heat chemical solutions at much higher watt densities than other immersion heaters without damaging the heating element. An adjustable thermostat automatically turns the heater on when the temperature drops below the set temperature and off when it rises above the set temperature. Adjust the set temperature with the dial. Heaters automatically shut off at 202° F to prevent fire and heating element burnout. The heating element is titanium for excellent resistance to harsh chemicals.

			Heating Element
Wattage, W	Watt Density, W/sq. in.	Current, A	Lg.	Wd.	Temp. Control Range, °F	Pipe Size	Thread Type	Gender	Electrical Connection Type	NEMA Style	Environmental Rating	For Use With		Each
Titanium Heating Element with 304 Stainless Steel Body
120V AC, Single Phase
1,500	42	12.5	15"	5.7"	90° to 190°	1 1/2	NPT	Female	Plug	5-15	NEMA 1	Ammonium Hydroxide (0-3%), Ammonium Hydroxide (3-6%), Deionized Water, Salt Water, Water	0000000	0000000
240V AC, Single Phase
3,000	84	12.5	15"	5.7"	90° to 190°	1 1/2	NPT	Female	Hardwire	__	NEMA 1	Ammonium Hydroxide (0-3%), Ammonium Hydroxide (3-6%), Deionized Water, Salt Water, Water	0000000	000000
4,000	112	16.7	15"	5.7"	90° to 190°	1 1/2	NPT	Female	Hardwire	__	NEMA 1	Ammonium Hydroxide (0-3%), Ammonium Hydroxide (3-6%), Deionized Water, Salt Water, Water	0000000	000000
6,000	167	25	15"	5.7"	90° to 190°	1 1/2	NPT	Female	Hardwire	__	NEMA 1	Ammonium Hydroxide (0-3%), Ammonium Hydroxide (3-6%), Deionized Water, Salt Water, Water	0000000	000000

Flow-Through Heaters for Coolant

Also known as circulation heaters, these install directly into pipelines to quickly and efficiently heat liquid through direct contact. To heat coolant without creating hot spots and damaging the heating element, they have a lower watt density than heaters for water or chemicals. An adjustable thermostat automatically turns the heater on when the temperature drops below the set temperature and off when it rises above the set temperature. Adjust the set temperature with the dial.

			Heating Element
Wattage, W	Watt Density, W/sq. in.	Current, A	Lg.	Wd.	No. of	Temp. Control Range, °F	Pipe Size	Thread Type	Gender	Wire Connection Type	For Use With		Each
Steel Heating Element with Steel Body
120V AC, Single Phase
500	17	4.2	8 3/8"	4"	1	150° to 560°	1	NPT	Female	Screw Terminals	Ethylene Glycol, Water	0000000	000000000
750	17	6.3	13"	4"	1	150° to 560°	1	NPT	Female	Screw Terminals	Ethylene Glycol, Water	0000000	00000000
240V AC, Single Phase
1,000	18	4.2	15 1/4"	4"	1	150° to 560°	1	NPT	Female	Screw Terminals	Ethylene Glycol, Water	0000000	00000000