Quality Instant / Tankless Water Heaters, Eemax and Rheem, Plumbing World

Tankless Electrice Water Heaters by Eemax
and Tankless Gas Water Heaters by Rheem

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see EX280T2P Eemax whole house electric tankless water heater
see the Eemax Series Two tankless water heaters - see more Eemax tankless water heaters
see larger Eemax electric tankless heaters - see Eemax replacement heater elements

see Ariston undercounter water heaters - see Myson tankless heater parts
see Takagi tankless gas water heaters - see Paloma instant gas water heaters
see Instant 190 ° hot water dispensers - see Aquastar gas tankless water heaters
see larger electric tankless water heaters from Stiebel Eltron
see water heater water flex connectors - see water heater gas flexes
see Frequently Asked Questions about tankless heaters

EX 95 Series Electric Tankless Water Heaters (top quality)

EX95
Flow Controlled

EX95T
Thermostatic

EX95TDI
De-ionized

EX95TDR
Digital Readout

These instant water heaters feature:

These are the finest tankless water heaters made in the U.S.
provides hot water whenever you need it and for as long as you need it
9.5KW- 240v, 40amp draw, needs 8ga wire & 50amp breaker, 3/4 gpm min. flow
Small and compact: 10 3/4" x 5 1/4" x 2 7/8" (Digital Readout size: 10" x 9" x 3")
Single phase models
These come in four different models; Flow-controlled, Thermostatic, De-ionized, and Digital Readout. They turn on with a flow switch (minimum of 3/4 gpm). The Flow-controlled model turns on at full power while the Thermostatic unit will adjust its power lever according to the incoming water temperature. Therefore, the Flow-controlled unit must be fed with cold water only, while the Thermostatic model can be fed with hot or cold water.
The Digital Readout and De-ionized models also have thermostatic temperature control. The Digital Readout model displays the temperature and the De-ionized model produces extreemly clean water.
We have been happily selling Eemax since we started with much customer satisfaction.

Tankless Water Heaters - EX 95 Series - (Single Heating Element)

Model	Description	°F Rise @.75GPM	°F Rise @1GPM	°F Rise @1.5GPM	°F Rise @2GPM	Price & Quantity
#EX95	Flow controlled	86°F	65°F	43°F	32°F	$215.83
#EX95T	Thermostatic	86°F	65°F	43°F	32°F	$266.79
#EX95TDI	De-ionized	86°F	65°F	43°F	32°F	$970.82
#EX95TDR	Digital Readout	86°F	65°F	43°F	32°F	$681.20

to replacement elements for Eemax

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click here for many other Eemax electric tankless water heater models
or click here for whole-house electric tankless water heaters

Another popular model is the SP35 at 3.5kw at 240v. This model is used in many gas stations, etc, where a small heat rise is all that is required for washing hands. The SP3012 rated at 3.5kw and 120v is also sold a lot. It is fine where you don't have large enough wiring, etc. The SP3012 does produce heat but note that it is only for certain applications, such as hand washing, as the heat rise isn't a lot.
also check out our low prices on MANY other voltage/wattage models that Eemax offers such as popular: "Single Point" Model #SP3012, 3.5kw, 120V, 25amp, 40°F rise @ 0.5gpm (specification sheet) - units smaller than the 9.5kw (240v) model above are normally only used in specialized applications because of the small temperature rise.

to other Eemax electric models - to Eemax Series2 electric tankless water heaters
to Eemax commercial size instantaneous water heaters
to elements for tankless water heaters
to tankless water heater faq's

Note: Prior to ordering, please check/confirm the temperature rise limits of all brands of instant tankless water heaters to make certain that they will meet your needs. We guarantee that they will heat as the manufacturer states in the specifications, but instant heaters are not for every water-heating application and will only offer the heat rise stated for each model.

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Pronto™ Tankless Gas Water Heaters
tankless water heaters
Shown: RTG-74 indoor & outdoor models These tankless water heaters feature:

Continuous hot water

Energy efficient design, no storage tank to keep hot

Electronically controlled - 120V, 60Hz single phase

Low NO_x emissions

Self-diagnostic program

Digital display remote

Exclusive oxygen depletion sensor - checks the exhaust gas to see how clean the unit is burning so the unit can adjust the sensing burner for a cleaner burn.

Exclusive film wrap overheat limiter - monitors the temperature of the heat exchanger and will shut the unit down if it exceeds a safe temperature. It also checks for a lack of oxygen - if detected, the unit will shut down.

Built-in electric blower

Includes 3/4" gas ball valve

Indoor units use Category III stainless steel vent

Indoor models supplied with a 120 volt power cord

Low NO_x emissions meet SCAQMD rule 1146 requirements

UMC-117 remote control is included - factory set to 120°F (can be dipswitch changed to a max 140°F) - additional remote control thermostats can be purchased separately

Manufacturer's 10 year limited warranty on heat exchanger, 3 year limited warranty on parts

Click for specifications

Note: these units are designed for installations from 0 to 3280 feet above sea level

Natural Gas Tankless Water Heaters - INDOOR Installation

Model # INDOOR MODEL - Description Price & Quantity
RTG-74PVN-2 Indoor Natural Gas Tankless Water Heater - 19,000 - 199,900 btu/hr $746.12
Accessories for RTG-74PVN-2
Model # Description Price & Quantity
RTG-20007 Installation Vent Kit for Horizontal Termination for RTG-74PV indoor tankless water heaters - 4" diameter. Included Components: Adapter (1), 90 Degree Elbow (2), 12" Length (1), 6-9" Adjustable Length Slip Connector - 3 Pieces (1), Horizontal Wall Thimble (1), 90 Degree Elbow Termination with Screen (1), Thermostat Wire for Remote Connection (1), Pressure Relief Valve (1). $269.21

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Natural Gas Tankless Water Heaters - OUTDOOR Installation

Model # OUTDOOR Model - Description Price & Quantity
RTG-74XN-2 Outdoor Natural Gas Tankless Water Heater - 19,000 - 199,900 btu/hr $746.12

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Propane Tankless Water Heaters - INDOOR Installation

Model # Description Price & Quantity
RTG-74PVP-2 Indoor Propane Tankless Water Heater - 19,000 - 199,900 btu/hr $747.98
Accessories For RTG-74PVP-2
Model # Description Price & Quantity
RTG-20007 Installation Vent Kit for Horizontal Termination for RTG-74PV indoor tankless water heaters - 4" diameter. Included Components: Adapter (1), 90 Degree Elbow (2), 12" Length (1), 6-9" Adjustable Length Slip Connector - 3 Pieces (1), Horizontal Wall Thimble (1), 90 Degree Elbow Termination with Screen (1), Thermostat Wire for Remote Connection (1), Pressure Relief Valve (1). $269.21

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Propane Tankless Water Heaters - OUTDOOR Installation

Model # Description Price & Quantity
RTG-74XP-2 Outdoor Propane Tankless Water Heater - 19,000 - 199,900 btu/hr $746.98

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Accessories For All Rheem RTG-74 Series Tankless Water Heaters
These accessories are designed to work with both indoor and outdoor models.

Model # Description Price & Quantity
2SVSNA04.5 Rheem Adapter Stainless Vent Adapter - more gas venting products $35.88
USC2-117 Additional Remotes for RTG-74 Tankless Water Heaters, provides user with an additional remote control that allows them to place at their desired location. It can be adjusted, however not higher than the temperature set on the main remote. $118.64
RTG-20038 Recess box for tankless water heater RTG-74X and GT-199X only $259.88

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Temperature Pressure Relief Valve is Required on All Water Heaters

Model # BTU Rating Price & Quantity
FVMX-5C 200,000 max $59.33

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to other relief valves

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"The Isolator"
Tankless Water Heater Isolation Valves

Tankless water heater isolation valves

Complete inlet/outlet valve system that provides everything you need for a secure installation including full port testing and flushing of the system with easy to install union connections.

Description Price & Quantity
Isolation Valve - Set (Hot & Cold) 3/4" IPS Union x 3/4" IPS $94.57
Isolation Valve - Set (Hot & Cold) 3/4" IPS Union x 3/4" Sweat $94.68
Pressure Relief Valve - Brass - 3/4" - 150 PSI
For the isolation valves shown above $13.97

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Ultraflow™ High BTU Stainless Steel Gas Connectors
Ultraflow gas connectors
These gas connectors feature:

Pre-assembled

Designed for applications with a significant BTU requirement

Can supply up to 290,000 BTU (NG) or 465,000 (LP)

Increases productivity by eliminating the need for pipe nipples, 90's and elbows

Common applications: tankless water heaters, commercial water heaters, furnaces, manufactured homes, boilers, rooftop HVAC units, and gas meters

Description Price & Quantity
Stainless Gasflex - 1"od (3/4"id) x 24" - with adapter to 3/4"fip x 3/4"mip $59.95

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Hot Water Heater Scale Inhibitor System

This water heater scale inhibitor system features:

3/4" NPT

6 GPM

Cold water feed line

Inhibits scale build-up caused by hard water

Helps protect piping from corrosion

Maintains efficiency and extends life of system

Translucent dispenser cartridge allows for convenient detection of remaining scale stopper level

Slow dissolve rate for long life and consistent dosing

Multi-application design effective on all types of hot water systems-boilers, tankless, and tank-type (gas or electric)

Made from FDA CFR-21 compliant materials, suitable for drinking and cooking water and all food applications

Replacement cartridges (AP431) are available for these in-line scale inhibitor systems

Description Price & Quantity
Hot Water Heater Scale Inhibitor System $66.10
Replacement filter for hot water heater scale inhibitor system $27.31
Note: Recommended time to change/replace filter cartridge is 6 months.
Purchase a replacement cartridge to have on hand when needed.

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Specifications For RTG-74 Rheem Tankless Water Heaters

DESCRIPTION FEATURES ROUGHING IN DIMENSIONS (shown in inches)
Model # Gas
Input
BTU/Hr. Type Temp.
Range* GPM @ 77°
Rise Max. GPM @ 45°
Rise Max. Water
Conn. Gas
Conn. Height Width Depth Vent
Diameter
RTG-74PVN-2
(Nat. Gas) 19,000-199,900 Indoor 100° to
140°F 4.2 7.4 3/4" 3/4" 25-3/8" 14-7/8" 11-1/8" 4"
RTG-74PVP-2
(LP Gas) 19,000-199,900 Indoor 100° to
140°F 4.2 7.4 3/4" 3/4" 25-3/8" 14-7/8" 11-1/8" 4"
RTG-74XN-2
(Nat. Gas) 19,000-199,900 Outdoor 100° to
140°F 4.2 7.4 3/4" 3/4" 25-3/8" 14-7/8" 11-1/8" N/A
RTG-74XP-2
(LP Gas) 19,000-199,900 Outdoor 100° to
140°F 4.2 7.4 3/4" 3/4" 25-3/8" 14-7/8" 11-1/8" N/A

click here to compare Rheem tankless water heaters

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Tankless Water Heaters - How It Works

to Takagi tankless water heaters - to Takagi # TK3 flash gas heater - to Takagi Mobius TM1 tankless gas water heater
to Paloma PH6 gas water heater - to Paloma PH12M - to Paloma PH24M tankless
to Eemax electric tankless water heaters - to Electric Eemax Series Two tankless water heaters
to Electric Commercial tankless water heaters by Eemax
to Whole house electric tankless water heaters
to Undercounter - point of use electric water heaters - to Instant 190 degree hot water dispensers
to Insinkerator hot water dispensers - to Franke Little Butler hot water dispensers

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Parts for Myson Water Heaters

Model Description Price & Quantity
#MysonPart-10-10075 Case seal for former direct vent $22.04
#MysonPart-10-13846 Ceramic interrupter insert $15.23
#MysonPart-10-12460 Diaphragm $52.05
#MysonPart-10-13850 Eco assembly (see replacement #50-10014)
#MysonPart-50-10014 High-limit thermostat 13 1/2" lead $56.23
#MysonPart-10-13495 Long sensing tube $23.11
#MysonPart-10-12410 Magnet, main gas valve, ffd assy $166.19
#MysonPart-20-11822 O-ring for diaphram push pin $5.82
#MysonPart-20-10047 O-ring for heat exchanger $3.49
#MysonPart-20-12335 O-ring for sensing tube $3.46
#MysonPart-20-14834 O-ring for thermostat bellows $3.51
#MysonPart-10-11935 Piezo electric $40.05
#MysonPart-10-10196 Seat tape for heat exchanger $24.80
#MysonPart-10-14923 Short sensing tube $43.07
#MysonPart-10-11904 Stat assembly pin $16.66
#MysonPart-10-13848 Thermocouple $42.65
#MysonPart-10-13849 Thermocouple connector extension $44.04
#MysonPart-10-13486 Thermostat bellows $227.46

If your Myson was manufactured in England then the above parts might fit. to Myson parts breakdown pictures

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"Is it possible to drain a tankless water heater to prevent freeze damage when not in use?"
Yes. Simply drain both lines 'to' and 'from' the unit. As long as there are no check valves in the way, that should drain the water from the unit. To guarantee that there is no water in the unit, we recommend two drain valves - one before and one after the unit - as well as blowing air through the water line.

"On the electric tankless models; why should I buy the thermostatic model instead of the lower priced flow model?"
The thermostatic model has a number of advantages. A non-thermostatically controlled model's outlet temperature is dependent on the flow rate, and it can create a potential problem with anti-scalding valves and the like. When in doubt, please order the thermostatically controlled models. Also, the thermostatic models can have a warm or hot water source, but the non thermostatically controlled models are only designed for a cold-water source/input.

"Can I replace my existing tank type water heater with a tankless water heater?"
Yes, but there are specific requirements that will need to be addressed. Gas units will require a larger, special vent pipe and a larger gas supply line that not only will supply the water heater, but all other appliances on that gas pipe run. Electric units will require larger gauge wire and breakers than most tank type water heaters.

"I have a pressure/temperature pressure balancing valve for scalding safety. Can I use all of the above instant heaters without worry?"
In that case never install a non-modulating heater such as the small electric tankless water heater model EX95. When ordering make sure to only order a heater that has a modulating valve and also it's a good idea to install an additional scald protection valve before your showerhead.

"I would like to convert my natural gas tankless heater to be able to use LPG (propane) gas instead. Do you offer a conversion kit?"
Sorry, but we don't. Even if we could, we probably wouldn't, as in most cases it is not a good idea to convert one type of gas for another. Burners can be different, orifices, etc. Not only is the BTU rating different for these two gases, but also the heat of the flames and a number of other factors. We simply do not wish to sell ("profit from") something that might create a non-safe environment.

"Will an instantaneous water heater save me money on my utility bills?"
Yes, in most applications you will see a savings. There are some variables that could reduce the amount you save. One example is you will not run out of hot water, so longer showers could cut into your savings. Also, the cost of electricity, propane and natural gas in your area will affect the amount of money saved. The higher the cost for the energy type used to heat your water, the quicker you will recover the higher initial cost of installing a tankless versus tank style water heater.

Positives:

Why

Negatives:

little

very

some

(not a negative if you originally purchase from us, as we like to carry parts for the units that we sell)

Summary:
Tankless water heaters have their place. They're not "the answer" to every hot water need, but if they're used correctly they can be the solution to many of them.

"Do you sell old Thermar or Homemaster brand gas tankless parts?"
If the units were manufactured in England (Thermar #TL100 and #TL200), then our Myson parts will probably fit.

"If these units don't have a tank, how do they know when to turn on?"
The tankless water heaters have a flow switch built into them. When you turn on (open) the hot side of a faucet the water then moves (travels). Once the water is traveling at 3/4 of a gallon per minute or faster most tankless water heater switches will then turn on the gas or electricity.

"What's the difference between a conventional flue and a direct vent?"
A conventional flue is what most people are familiar with. It typically consists of a double-wall flue pipe going from the top of the heater through the roof, venting outside. The fixture draws its combustion air from the space around it (utility room, garage, hallway, etc.). A direct-vent unit on the other hand, both vents and draws its combustion air through a specially designed pipe from the outside via an adjacent wall.

"Can I install tankless water heaters in my attic?"
Without seeing all of your plumbing piping, etc. it is difficult for us to answer with a straight "yes" or "no." One must be sure that a possible water siphoning condition can not be created as tankless water heaters should not have air in the lines. Water siphoning out of any brand of tankless water heater might damage the heater when there is no water (or not enough water) in the lines.

"Your products specify the 'temp. rise' based on the GPM flow; what do you mean by this?"
Temperature rise is the amount the heater raises the temperature of the incoming water, based on the flow rate shown of that water.

Help save our environment by saving energy.
Stand-by heat loss wastes a LOT of energy.
Installing tankless water heaters saves
energy, as well as your pocket book in the
long run. Think future! Think green.
Think Tankless!

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Model #	INDOOR MODEL - Description	Price & Quantity
RTG-74PVN-2	Indoor Natural Gas Tankless Water Heater - 19,000 - 199,900 btu/hr	$746.12
Accessories for RTG-74PVN-2
Model #	Description	Price & Quantity
RTG-20007	Installation Vent Kit for Horizontal Termination for RTG-74PV indoor tankless water heaters - 4" diameter. Included Components: Adapter (1), 90 Degree Elbow (2), 12" Length (1), 6-9" Adjustable Length Slip Connector - 3 Pieces (1), Horizontal Wall Thimble (1), 90 Degree Elbow Termination with Screen (1), Thermostat Wire for Remote Connection (1), Pressure Relief Valve (1).	$269.21

Model #	OUTDOOR Model - Description	Price & Quantity
RTG-74XN-2	Outdoor Natural Gas Tankless Water Heater - 19,000 - 199,900 btu/hr	$746.12

Model #	BTU Rating	Price & Quantity
FVMX-5C	200,000 max	$59.33

Description	Price & Quantity
Isolation Valve - Set (Hot & Cold) 3/4" IPS Union x 3/4" IPS	$94.57
Isolation Valve - Set (Hot & Cold) 3/4" IPS Union x 3/4" Sweat	$94.68
Pressure Relief Valve - Brass - 3/4" - 150 PSI For the isolation valves shown above	$13.97

DESCRIPTION			FEATURES			ROUGHING IN DIMENSIONS (shown in inches)
Model #	Gas Input BTU/Hr.	Type	Temp. Range*	GPM @ 77° Rise Max.	GPM @ 45° Rise Max.	Water Conn.	Gas Conn.	Height	Width	Depth	Vent Diameter
RTG-74PVN-2 (Nat. Gas)	19,000-199,900	Indoor	100° to 140°F	4.2	7.4	3/4"	3/4"	25-3/8"	14-7/8"	11-1/8"	4"
RTG-74PVP-2 (LP Gas)	19,000-199,900	Indoor	100° to 140°F	4.2	7.4	3/4"	3/4"	25-3/8"	14-7/8"	11-1/8"	4"
RTG-74XN-2 (Nat. Gas)	19,000-199,900	Outdoor	100° to 140°F	4.2	7.4	3/4"	3/4"	25-3/8"	14-7/8"	11-1/8"	N/A
RTG-74XP-2 (LP Gas)	19,000-199,900	Outdoor	100° to 140°F	4.2	7.4	3/4"	3/4"	25-3/8"	14-7/8"	11-1/8"	N/A